TY  - JOUR
AU  - Slavković-Beškoski, Latinka
AU  - Ignjatović, Ljubiša
AU  - Bolognesi, Guido
AU  - Maksin, Danijela
AU  - Savić, Aleksandra
AU  - Vladisavljević, Goran
AU  - Onjia, Antonije E.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10251
AB  - A dispersive solid-phase microextraction (DSPME) sorbent consisting of poly(1,6-hexanedi-ol diacrylate)-based polymer microspheres, with embedded graphene microparticles (poly(HDDA)/g-raphene), was synthesized by microfluidic emulsification/photopolymerization and characterized by optical microscopy and X-ray fluorescence spectrometry. This sorbent was applied for simple, fast, and sensitive vortex-assisted DSPME of rare earth elements (RREs) in coal fly ash (CFA) leachate, prior to their quantification by inductively coupled plasma mass spectrometry (ICP-MS). Among nine DSPME variables, the Plackett–Burman screening design (PBD), followed by the central composite optimization design (CCD) using the Derringer desirability function (D), identified the eluent type as the most influencing DSPME variable. The optimum conditions with maximum D (0.65) for the chelating agent di-(2-ethylhexyl) phosphoric acid (D2EHPA) amount, the sorbent amount, the eluting solvent, the extraction temperature, the centrifuge speed, the vortexing time, the elution time, the centrifugation time, and pH, were set to 60 µL, 30 mg, 2 M HNO3, 25◦ C, 6000 rpm, 1 min, 1 min, 5 min, and 4.2, respectively. Analytical validation of the DSPME method for 16 REEs (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in CFA leachate samples estimated the detection limits at the low ppt level, the recovery range 43–112%, and relative standard deviation within ± 22%. This method was applied to a water extraction procedure (EP) and acetic acid toxicity characteristic leaching procedure (TCLP) for leachate of CFA, from five different coal-fired thermoelectric power plants. The most abundant REEs in leachate (20 ÷ 1 solid-to-liquid ratio) are Ce, Y, and La, which were found in the range of 22–194 ng/L, 35–105 ng/L, 48–95 ng/L, and 9.6–51 µg/L, 7.3–22 µg/L, 2.4–17 µg/L, for EP and TCLP leachate, respectively. The least present REE in TCLP leachate was Lu (42–125 ng/L), which was not detected in EP leachate.
T2  - Metals
T1  - Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate
VL  - 12
SP  - 5
SP  - 791
DO  - 10.3390/met12050791
ER  - 

@article{
author = "Slavković-Beškoski, Latinka and Ignjatović, Ljubiša and Bolognesi, Guido and Maksin, Danijela and Savić, Aleksandra and Vladisavljević, Goran and Onjia, Antonije E.",
year = "2022",
abstract = "A dispersive solid-phase microextraction (DSPME) sorbent consisting of poly(1,6-hexanedi-ol diacrylate)-based polymer microspheres, with embedded graphene microparticles (poly(HDDA)/g-raphene), was synthesized by microfluidic emulsification/photopolymerization and characterized by optical microscopy and X-ray fluorescence spectrometry. This sorbent was applied for simple, fast, and sensitive vortex-assisted DSPME of rare earth elements (RREs) in coal fly ash (CFA) leachate, prior to their quantification by inductively coupled plasma mass spectrometry (ICP-MS). Among nine DSPME variables, the Plackett–Burman screening design (PBD), followed by the central composite optimization design (CCD) using the Derringer desirability function (D), identified the eluent type as the most influencing DSPME variable. The optimum conditions with maximum D (0.65) for the chelating agent di-(2-ethylhexyl) phosphoric acid (D2EHPA) amount, the sorbent amount, the eluting solvent, the extraction temperature, the centrifuge speed, the vortexing time, the elution time, the centrifugation time, and pH, were set to 60 µL, 30 mg, 2 M HNO3, 25◦ C, 6000 rpm, 1 min, 1 min, 5 min, and 4.2, respectively. Analytical validation of the DSPME method for 16 REEs (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) in CFA leachate samples estimated the detection limits at the low ppt level, the recovery range 43–112%, and relative standard deviation within ± 22%. This method was applied to a water extraction procedure (EP) and acetic acid toxicity characteristic leaching procedure (TCLP) for leachate of CFA, from five different coal-fired thermoelectric power plants. The most abundant REEs in leachate (20 ÷ 1 solid-to-liquid ratio) are Ce, Y, and La, which were found in the range of 22–194 ng/L, 35–105 ng/L, 48–95 ng/L, and 9.6–51 µg/L, 7.3–22 µg/L, 2.4–17 µg/L, for EP and TCLP leachate, respectively. The least present REE in TCLP leachate was Lu (42–125 ng/L), which was not detected in EP leachate.",
journal = "Metals",
title = "Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate",
volume = "12",
pages = "5-791",
doi = "10.3390/met12050791"
}

Slavković-Beškoski, L., Ignjatović, L., Bolognesi, G., Maksin, D., Savić, A., Vladisavljević, G.,& Onjia, A. E.. (2022). Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate. in Metals, 12, 5.
https://doi.org/10.3390/met12050791

Slavković-Beškoski L, Ignjatović L, Bolognesi G, Maksin D, Savić A, Vladisavljević G, Onjia AE. Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate. in Metals. 2022;12:5.
doi:10.3390/met12050791 .

Slavković-Beškoski, Latinka, Ignjatović, Ljubiša, Bolognesi, Guido, Maksin, Danijela, Savić, Aleksandra, Vladisavljević, Goran, Onjia, Antonije E., "Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate" in Metals, 12 (2022):5,
https://doi.org/10.3390/met12050791 . .

TY  - JOUR
AU  - Đorđević, Jelena S.
AU  - Vladisavljević, Goran T.
AU  - Trtić-Petrović, Tatjana M.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1318
AB  - A two-phase membrane extraction in a hollow fibre contactor with feed-stream recycle was applied to remove selected pesticides (tebufenozide, linuron, imidacloprid, acetamiprid and dimethoate) from their mixed aqueous solutions. The contactor consisted of 50 polypropylene hollow fibres impregnated with 5% tri-n-octylphosphine oxide in di-n-hexyl ether. For low-polar pesticides with log P2 (tebufenozide and linuron), the maximum removal efficiency increased linearly from 85% to 96% with increasing the feed flow rate. The maximum removal efficiencies of more polar pesticides were significantly higher under feed recirculation (86%) than in a continuous single-pass operation (30%). It was found from the Wilsons plot that the mass transfer resistance of the liquid membrane can be neglected for low-polar pesticides. The pesticide removals from commercial formulations were similar to those from pure pesticide solutions, indicating that built-in adjuvants did not affect the extraction process.
T2  - Environmental Technology
T1  - Liquid-phase membrane extraction of targeted pesticides from manufacturing wastewaters in a hollow fibre contactor with feed-stream recycle
VL  - 38
IS  - 1
SP  - 78
EP  - 84
DO  - 10.1080/09593330.2016.1186747
ER  - 

@article{
author = "Đorđević, Jelena S. and Vladisavljević, Goran T. and Trtić-Petrović, Tatjana M.",
year = "2017",
abstract = "A two-phase membrane extraction in a hollow fibre contactor with feed-stream recycle was applied to remove selected pesticides (tebufenozide, linuron, imidacloprid, acetamiprid and dimethoate) from their mixed aqueous solutions. The contactor consisted of 50 polypropylene hollow fibres impregnated with 5% tri-n-octylphosphine oxide in di-n-hexyl ether. For low-polar pesticides with log P2 (tebufenozide and linuron), the maximum removal efficiency increased linearly from 85% to 96% with increasing the feed flow rate. The maximum removal efficiencies of more polar pesticides were significantly higher under feed recirculation (86%) than in a continuous single-pass operation (30%). It was found from the Wilsons plot that the mass transfer resistance of the liquid membrane can be neglected for low-polar pesticides. The pesticide removals from commercial formulations were similar to those from pure pesticide solutions, indicating that built-in adjuvants did not affect the extraction process.",
journal = "Environmental Technology",
title = "Liquid-phase membrane extraction of targeted pesticides from manufacturing wastewaters in a hollow fibre contactor with feed-stream recycle",
volume = "38",
number = "1",
pages = "78-84",
doi = "10.1080/09593330.2016.1186747"
}

Đorđević, J. S., Vladisavljević, G. T.,& Trtić-Petrović, T. M.. (2017). Liquid-phase membrane extraction of targeted pesticides from manufacturing wastewaters in a hollow fibre contactor with feed-stream recycle. in Environmental Technology, 38(1), 78-84.
https://doi.org/10.1080/09593330.2016.1186747

Đorđević JS, Vladisavljević GT, Trtić-Petrović TM. Liquid-phase membrane extraction of targeted pesticides from manufacturing wastewaters in a hollow fibre contactor with feed-stream recycle. in Environmental Technology. 2017;38(1):78-84.
doi:10.1080/09593330.2016.1186747 .

Đorđević, Jelena S., Vladisavljević, Goran T., Trtić-Petrović, Tatjana M., "Liquid-phase membrane extraction of targeted pesticides from manufacturing wastewaters in a hollow fibre contactor with feed-stream recycle" in Environmental Technology, 38, no. 1 (2017):78-84,
https://doi.org/10.1080/09593330.2016.1186747 . .

TY  - JOUR
AU  - Petrović, Đorđe
AU  - Trtić-Petrović, Tatjana M.
AU  - Vladisavljević, Goran T.
AU  - Stoiljković, Milovan
AU  - Slavković-Beškoski, Latinka J.
AU  - Kumrić, Ksenija
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/562
AB  - Separation of yttrium(III) from strontium(II) with 15% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The donor phase was a mixture of 5.7 mmol dm(-3) of Sr(II) and 0.23 mmol dm(-3) of Y(III) in 0.1 mol dm(-3) HCl, the acceptor solution was 3 mol dm(-3) HCl, and the donor to acceptor phase volume ratio was 6.2. At the donor flow rate of 4.7 cm(3) min(-1) and the acceptor flow rate of 0.8 cm(3) min(-1), the yield of Y(III) in the acceptor phase (in the form suitable for radiopharmaceutical preparation) reached 60% after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to 1:25 in the donor phase. The yield of Y(III) was 72% at the acceptor flow rate to 1.9 cm3 min(-1), but a breakthrough of Sr(II) through liquid membrane increased from 0.02 to 0.2%. (C) 2015 The Institution a Chemical Engineers. Published by Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Research and Design
T1  - Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor
VL  - 97
SP  - 57
EP  - 67
DO  - 10.1016/j.cherd.2015.03.015
ER  - 

@article{
author = "Petrović, Đorđe and Trtić-Petrović, Tatjana M. and Vladisavljević, Goran T. and Stoiljković, Milovan and Slavković-Beškoski, Latinka J. and Kumrić, Ksenija",
year = "2015",
abstract = "Separation of yttrium(III) from strontium(II) with 15% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in dodecane was carried out in a hollow fiber supported liquid membrane (SLM) extraction system operated under closed-loop recirculation of the donor and acceptor phase. The donor phase was a mixture of 5.7 mmol dm(-3) of Sr(II) and 0.23 mmol dm(-3) of Y(III) in 0.1 mol dm(-3) HCl, the acceptor solution was 3 mol dm(-3) HCl, and the donor to acceptor phase volume ratio was 6.2. At the donor flow rate of 4.7 cm(3) min(-1) and the acceptor flow rate of 0.8 cm(3) min(-1), the yield of Y(III) in the acceptor phase (in the form suitable for radiopharmaceutical preparation) reached 60% after 360 min with a molar ratio of Y(III) to Sr(II) in the acceptor of 250:1, as compared to 1:25 in the donor phase. The yield of Y(III) was 72% at the acceptor flow rate to 1.9 cm3 min(-1), but a breakthrough of Sr(II) through liquid membrane increased from 0.02 to 0.2%. (C) 2015 The Institution a Chemical Engineers. Published by Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Research and Design",
title = "Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor",
volume = "97",
pages = "57-67",
doi = "10.1016/j.cherd.2015.03.015"
}

Petrović, Đ., Trtić-Petrović, T. M., Vladisavljević, G. T., Stoiljković, M., Slavković-Beškoski, L. J.,& Kumrić, K.. (2015). Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor. in Chemical Engineering Research and Design, 97, 57-67.
https://doi.org/10.1016/j.cherd.2015.03.015

Petrović Đ, Trtić-Petrović TM, Vladisavljević GT, Stoiljković M, Slavković-Beškoski LJ, Kumrić K. Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor. in Chemical Engineering Research and Design. 2015;97:57-67.
doi:10.1016/j.cherd.2015.03.015 .

Petrović, Đorđe, Trtić-Petrović, Tatjana M., Vladisavljević, Goran T., Stoiljković, Milovan, Slavković-Beškoski, Latinka J., Kumrić, Ksenija, "Novel Sr-90-Y-90 generator system based on a pertraction through supported liquid membrane in hollow fiber contactor" in Chemical Engineering Research and Design, 97 (2015):57-67,
https://doi.org/10.1016/j.cherd.2015.03.015 . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/822
AB  - This paper provides an overview of membrane emulsification routes for fabrication of structured microparticles with tailored properties for specific applications. Direct (bottom-up) and premix (top-down) membrane emulsification processes are discussed including operational, formulation and membrane factors that control the droplet size and droplet generation regimes. A special emphasis was put on different methods of controlled shear generation on membrane surface, such as cross flow on the membrane surface, swirl flow, forward and backward flow pulsations in the continuous phase and membrane oscillations and rotations. Droplets produced by membrane emulsification can be used for synthesis of particles with versatile morphology (solid and hollow, matrix and core/shell, spherical and non-spherical, porous and coherent, composite and homogeneous), which can be surface functionalised and coated or loaded with macromolecules, nanoparticles, quantum dots, drugs, phase change materials and high molecular weight gases to achieve controlled/targeted drug release and impart special optical, chemical, electrical, acoustic, thermal and magnetic properties. The template emulsions including metal-in-oil, solid-in-oil-in-water, oil-in-oil, multilayer, and Pickering emulsions can be produced with high encapsulation efficiency of encapsulated materials and narrow size distribution and transformed into structured particles using a variety of solidification processes, such as polymerisation (suspension, mini-emulsion, interfacial and in-situ), ionic gelation, chemical crosslinldng, melt solidification, internal phase separation, layer-by-layer electrostatic deposition, particle self-assembly, complex coacervation, spray drying, sol gel processing, and molecular imprinting. Particles fabricated from droplets produced by membrane emulsification include nanoclusters, colloidosomes, carbon aerogel particles, nanoshells, polymeric (molecularly imprinted, hypercrosslinked, Janus and core/shell) particles, solder metal powders and inorganic particles. Membrane emulsification devices operate under constant temperature due to low shear rates on the membrane surface, which range from (1-10) x 10(3) s(-1) in a direct process to (1-10) x 10(4) s(-1) in a premix process. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Advances in Colloid and Interface Science
T1  - Structured microparticles with tailored properties produced by membrane emulsification
VL  - 225
SP  - 53
EP  - 87
DO  - 10.1016/j.cis.2015.07.013
ER  - 

@article{
author = "Vladisavljević, Goran T.",
year = "2015",
abstract = "This paper provides an overview of membrane emulsification routes for fabrication of structured microparticles with tailored properties for specific applications. Direct (bottom-up) and premix (top-down) membrane emulsification processes are discussed including operational, formulation and membrane factors that control the droplet size and droplet generation regimes. A special emphasis was put on different methods of controlled shear generation on membrane surface, such as cross flow on the membrane surface, swirl flow, forward and backward flow pulsations in the continuous phase and membrane oscillations and rotations. Droplets produced by membrane emulsification can be used for synthesis of particles with versatile morphology (solid and hollow, matrix and core/shell, spherical and non-spherical, porous and coherent, composite and homogeneous), which can be surface functionalised and coated or loaded with macromolecules, nanoparticles, quantum dots, drugs, phase change materials and high molecular weight gases to achieve controlled/targeted drug release and impart special optical, chemical, electrical, acoustic, thermal and magnetic properties. The template emulsions including metal-in-oil, solid-in-oil-in-water, oil-in-oil, multilayer, and Pickering emulsions can be produced with high encapsulation efficiency of encapsulated materials and narrow size distribution and transformed into structured particles using a variety of solidification processes, such as polymerisation (suspension, mini-emulsion, interfacial and in-situ), ionic gelation, chemical crosslinldng, melt solidification, internal phase separation, layer-by-layer electrostatic deposition, particle self-assembly, complex coacervation, spray drying, sol gel processing, and molecular imprinting. Particles fabricated from droplets produced by membrane emulsification include nanoclusters, colloidosomes, carbon aerogel particles, nanoshells, polymeric (molecularly imprinted, hypercrosslinked, Janus and core/shell) particles, solder metal powders and inorganic particles. Membrane emulsification devices operate under constant temperature due to low shear rates on the membrane surface, which range from (1-10) x 10(3) s(-1) in a direct process to (1-10) x 10(4) s(-1) in a premix process. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Advances in Colloid and Interface Science",
title = "Structured microparticles with tailored properties produced by membrane emulsification",
volume = "225",
pages = "53-87",
doi = "10.1016/j.cis.2015.07.013"
}

Vladisavljević, G. T.. (2015). Structured microparticles with tailored properties produced by membrane emulsification. in Advances in Colloid and Interface Science
Elsevier., 225, 53-87.
https://doi.org/10.1016/j.cis.2015.07.013

Vladisavljević GT. Structured microparticles with tailored properties produced by membrane emulsification. in Advances in Colloid and Interface Science. 2015;225:53-87.
doi:10.1016/j.cis.2015.07.013 .

Vladisavljević, Goran T., "Structured microparticles with tailored properties produced by membrane emulsification" in Advances in Colloid and Interface Science, 225 (2015):53-87,
https://doi.org/10.1016/j.cis.2015.07.013 . .

TY  - CONF
AU  - Kumrić, Ksenija
AU  - Petrović, Đorđe
AU  - Vladisavljević, Goran T.
AU  - Stoiljković, Milovan
AU  - Slavković-Beškoski, Latinka J.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9253
AB  - Separation of Y(III) from Sr(II) was performed using the hollow fibre
membrane contactor operated in a recirculation mode. The steady-state was
established after ~5 h of operation and the maximum removal of Y(III) from
the donor to the acceptor was achieved at the donor flow rate of 4.7 cm3
min-1. The investigated system showed promising results as a method which
could be potentially applied for the preparation of 90Sr/90Y generator system.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Separation of yttrium from strontium by hollow fibre supported liquid membrane containing di(2-ethylhexyl)phosphoric acid
VL  - L-05-P
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9253
ER  - 

@conference{
author = "Kumrić, Ksenija and Petrović, Đorđe and Vladisavljević, Goran T. and Stoiljković, Milovan and Slavković-Beškoski, Latinka J.",
year = "2014",
abstract = "Separation of Y(III) from Sr(II) was performed using the hollow fibre
membrane contactor operated in a recirculation mode. The steady-state was
established after ~5 h of operation and the maximum removal of Y(III) from
the donor to the acceptor was achieved at the donor flow rate of 4.7 cm3
min-1. The investigated system showed promising results as a method which
could be potentially applied for the preparation of 90Sr/90Y generator system.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Separation of yttrium from strontium by hollow fibre supported liquid membrane containing di(2-ethylhexyl)phosphoric acid",
volume = "L-05-P",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9253"
}

Kumrić, K., Petrović, Đ., Vladisavljević, G. T., Stoiljković, M.,& Slavković-Beškoski, L. J.. (2014). Separation of yttrium from strontium by hollow fibre supported liquid membrane containing di(2-ethylhexyl)phosphoric acid. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., L-05-P.
https://hdl.handle.net/21.15107/rcub_vinar_9253

Kumrić K, Petrović Đ, Vladisavljević GT, Stoiljković M, Slavković-Beškoski LJ. Separation of yttrium from strontium by hollow fibre supported liquid membrane containing di(2-ethylhexyl)phosphoric acid. in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2014;L-05-P.
https://hdl.handle.net/21.15107/rcub_vinar_9253 .

Kumrić, Ksenija, Petrović, Đorđe, Vladisavljević, Goran T., Stoiljković, Milovan, Slavković-Beškoski, Latinka J., "Separation of yttrium from strontium by hollow fibre supported liquid membrane containing di(2-ethylhexyl)phosphoric acid" in Physical chemistry 2014: 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry, L-05-P (2014),
https://hdl.handle.net/21.15107/rcub_vinar_9253 .

TY  - JOUR
AU  - Đorđević, Jelena S.
AU  - Vladisavljević, Goran T.
AU  - Trtić-Petrović, Tatjana M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5934
AB  - A supported liquid membrane extraction of different pesticides (acetamiprid, dimethoate, imidacloprid, linuron, and tebufenozide) from an aqueous solution containing 20 mg dm(-3) of each pesticide by 5% TOPO (tri-n-octylphosphine oxide) in DHE (di-n-hexyl ether) has been investigated in a hollow fiber contactor having an aqueous feed/organic interfacial area of 15.4 cm(2). In a single-pass operation, the maximum removal efficiency of 95% was achieved for the most nonpolar (log P = 4.38) pesticide tebufenozide at the feed flow rate of 0.5 cm(3) min(-1). The diffusion through the boundary layer of the feed stream was a rate-controlling step in the extraction of nonpolar pesticides (linuron and tebufenozide) with a mass-transfer coefficient in the feed stream being proportional to the feed flow rate raised to the power of 0.51-0.57. The maximum overall mass-transfer coefficient based on the feed phase of K-F = 0.18 cm min(-1) was obtained for tebufenozide at the feed flow rate of 1.8 cm(3) min(-1). The organic phase entrapped in the membrane pores offered a major resistance to the mass transfer of polar pesticides (log P LT 1) and accounted for 85% of the overall mass-transfer resistance for imidacloprid at 1.8 cm(3) min(-1). The pesticides removed from the feed solution were almost completely accumulated in the organic phase but were recovered from the membrane pores to a large extent (50-90%) by rinsing the membrane with methanol after extraction.
T2  - Industrial and Engineering Chemistry Research
T1  - Removal of the Selected Pesticides from a Water Solution by Applying Hollow Fiber Liquid-Liquid Membrane Extraction
VL  - 53
IS  - 12
SP  - 4861
EP  - 4870
DO  - 10.1021/ie404210k
ER  - 

@article{
author = "Đorđević, Jelena S. and Vladisavljević, Goran T. and Trtić-Petrović, Tatjana M.",
year = "2014",
abstract = "A supported liquid membrane extraction of different pesticides (acetamiprid, dimethoate, imidacloprid, linuron, and tebufenozide) from an aqueous solution containing 20 mg dm(-3) of each pesticide by 5% TOPO (tri-n-octylphosphine oxide) in DHE (di-n-hexyl ether) has been investigated in a hollow fiber contactor having an aqueous feed/organic interfacial area of 15.4 cm(2). In a single-pass operation, the maximum removal efficiency of 95% was achieved for the most nonpolar (log P = 4.38) pesticide tebufenozide at the feed flow rate of 0.5 cm(3) min(-1). The diffusion through the boundary layer of the feed stream was a rate-controlling step in the extraction of nonpolar pesticides (linuron and tebufenozide) with a mass-transfer coefficient in the feed stream being proportional to the feed flow rate raised to the power of 0.51-0.57. The maximum overall mass-transfer coefficient based on the feed phase of K-F = 0.18 cm min(-1) was obtained for tebufenozide at the feed flow rate of 1.8 cm(3) min(-1). The organic phase entrapped in the membrane pores offered a major resistance to the mass transfer of polar pesticides (log P LT 1) and accounted for 85% of the overall mass-transfer resistance for imidacloprid at 1.8 cm(3) min(-1). The pesticides removed from the feed solution were almost completely accumulated in the organic phase but were recovered from the membrane pores to a large extent (50-90%) by rinsing the membrane with methanol after extraction.",
journal = "Industrial and Engineering Chemistry Research",
title = "Removal of the Selected Pesticides from a Water Solution by Applying Hollow Fiber Liquid-Liquid Membrane Extraction",
volume = "53",
number = "12",
pages = "4861-4870",
doi = "10.1021/ie404210k"
}

Đorđević, J. S., Vladisavljević, G. T.,& Trtić-Petrović, T. M.. (2014). Removal of the Selected Pesticides from a Water Solution by Applying Hollow Fiber Liquid-Liquid Membrane Extraction. in Industrial and Engineering Chemistry Research, 53(12), 4861-4870.
https://doi.org/10.1021/ie404210k

Đorđević JS, Vladisavljević GT, Trtić-Petrović TM. Removal of the Selected Pesticides from a Water Solution by Applying Hollow Fiber Liquid-Liquid Membrane Extraction. in Industrial and Engineering Chemistry Research. 2014;53(12):4861-4870.
doi:10.1021/ie404210k .

Đorđević, Jelena S., Vladisavljević, Goran T., Trtić-Petrović, Tatjana M., "Removal of the Selected Pesticides from a Water Solution by Applying Hollow Fiber Liquid-Liquid Membrane Extraction" in Industrial and Engineering Chemistry Research, 53, no. 12 (2014):4861-4870,
https://doi.org/10.1021/ie404210k . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
AU  - Wang, Bing
AU  - Dragosavac, Marijana M.
AU  - Holdich, Richard G.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7010
AB  - Food-grade water-in-oil-in-water (W/O/W) multiple emulsions with a volume median diameter of outer droplets of 50-210 mu m were produced by injecting a water-in-oil (W/O) emulsion at the flux of 30 L m(-2) h(-1) through a 10-mu m pore electroplated nickel membrane oscillating at 10-90 Hz frequency and 0.1-5 mm amplitude in 2 wt% aqueous Tween(R) 20 (polyoxyethylene sorbitan monolaurate) solution. The oil phase in the primary W/O emulsion was 5 wt% PGPR (polyglycerol polyricinoleate) dissolved in sunflower oil and the content of water phase in the W/O emulsion was 30 vol%. The size of outer droplets was precisely controlled by the amplitude and frequency of membrane oscillation. Only 3-5% of the inner droplets with a mean diameter of 0.54 mu m were released into the outer aqueous phase during membrane emulsification. A sustained release of 200 ppm copper (II) loaded in the inner aqueous phase was investigated over 7 days. 95% of Cu(II) initially present in the inner water phase was released in the first 2 days from 56-mu m diameter multiple emulsion droplets and less than 15% of Cu(II) was released over the same interval from 122 mu m droplets. The release rate of Cu(II) decreased with increasing the size of outer droplets and followed non-zero-order kinetics with a release exponent of 0.3-0.5. The prepared multiple emulsions can be used for controlled release of hydrophilic actives in the pharmaceutical, food, and cosmetic industry. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Production of food-grade multiple emulsions with high encapsulation yield using oscillating membrane emulsification
VL  - 458
SP  - 78
EP  - 84
DO  - 10.1016/j.colsurfa.2014.05.011
ER  - 

@article{
author = "Vladisavljević, Goran T. and Wang, Bing and Dragosavac, Marijana M. and Holdich, Richard G.",
year = "2014",
abstract = "Food-grade water-in-oil-in-water (W/O/W) multiple emulsions with a volume median diameter of outer droplets of 50-210 mu m were produced by injecting a water-in-oil (W/O) emulsion at the flux of 30 L m(-2) h(-1) through a 10-mu m pore electroplated nickel membrane oscillating at 10-90 Hz frequency and 0.1-5 mm amplitude in 2 wt% aqueous Tween(R) 20 (polyoxyethylene sorbitan monolaurate) solution. The oil phase in the primary W/O emulsion was 5 wt% PGPR (polyglycerol polyricinoleate) dissolved in sunflower oil and the content of water phase in the W/O emulsion was 30 vol%. The size of outer droplets was precisely controlled by the amplitude and frequency of membrane oscillation. Only 3-5% of the inner droplets with a mean diameter of 0.54 mu m were released into the outer aqueous phase during membrane emulsification. A sustained release of 200 ppm copper (II) loaded in the inner aqueous phase was investigated over 7 days. 95% of Cu(II) initially present in the inner water phase was released in the first 2 days from 56-mu m diameter multiple emulsion droplets and less than 15% of Cu(II) was released over the same interval from 122 mu m droplets. The release rate of Cu(II) decreased with increasing the size of outer droplets and followed non-zero-order kinetics with a release exponent of 0.3-0.5. The prepared multiple emulsions can be used for controlled release of hydrophilic actives in the pharmaceutical, food, and cosmetic industry. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Production of food-grade multiple emulsions with high encapsulation yield using oscillating membrane emulsification",
volume = "458",
pages = "78-84",
doi = "10.1016/j.colsurfa.2014.05.011"
}

Vladisavljević, G. T., Wang, B., Dragosavac, M. M.,& Holdich, R. G.. (2014). Production of food-grade multiple emulsions with high encapsulation yield using oscillating membrane emulsification. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 458, 78-84.
https://doi.org/10.1016/j.colsurfa.2014.05.011

Vladisavljević GT, Wang B, Dragosavac MM, Holdich RG. Production of food-grade multiple emulsions with high encapsulation yield using oscillating membrane emulsification. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2014;458:78-84.
doi:10.1016/j.colsurfa.2014.05.011 .

Vladisavljević, Goran T., Wang, Bing, Dragosavac, Marijana M., Holdich, Richard G., "Production of food-grade multiple emulsions with high encapsulation yield using oscillating membrane emulsification" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 458 (2014):78-84,
https://doi.org/10.1016/j.colsurfa.2014.05.011 . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
AU  - Vukosavljevic, Predrag
AU  - Veljović, Mile S.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5785
AB  - Red raspberry (Rubus idaeus) juice was produced by maceration of raspberry pulp at 50 degrees C for 2 h using 400 mg kg(-1) Klerzyme (R) 150 enzymatic pectolitic preparation followed by raw juice clarification with gelatin and bentonite or cross-flow membrane filtration. A minimal loss of anthocyanins from 630 to 540 mg l(-1) was obtained when the juice was clarified using a ceramic multichannel microfilter (MF) with a pore size of 0.2 mu m. A light transmission at 625 nm in MF permeate was above 85% and the residual pectin (900 mg l(-1)) was completely removed. During ultrafiltration through ceramic or polysulfone membranes with a molecular weight cut-off of 30-300 kDa, the content of anthocyanins was reduced to 220-370 mg l(-1), but a light transmission at 625 nm was as high as 96%. The permeate flux in MF was maintained at high values above 170 l m(-2) h(-1) at 3 bar for more than 2 h by backwashing the membrane with a compressed air every 6 min for 1 mm. The cake compression at high pressures was avoided by short filtration times between backwashing. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
T2  - Food and Bioproducts Processing
T1  - Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins
VL  - 91
IS  - C4
SP  - 473
EP  - 480
DO  - 10.1016/j.fbp.2013.05.004
ER  - 

@article{
author = "Vladisavljević, Goran T. and Vukosavljevic, Predrag and Veljović, Mile S.",
year = "2013",
abstract = "Red raspberry (Rubus idaeus) juice was produced by maceration of raspberry pulp at 50 degrees C for 2 h using 400 mg kg(-1) Klerzyme (R) 150 enzymatic pectolitic preparation followed by raw juice clarification with gelatin and bentonite or cross-flow membrane filtration. A minimal loss of anthocyanins from 630 to 540 mg l(-1) was obtained when the juice was clarified using a ceramic multichannel microfilter (MF) with a pore size of 0.2 mu m. A light transmission at 625 nm in MF permeate was above 85% and the residual pectin (900 mg l(-1)) was completely removed. During ultrafiltration through ceramic or polysulfone membranes with a molecular weight cut-off of 30-300 kDa, the content of anthocyanins was reduced to 220-370 mg l(-1), but a light transmission at 625 nm was as high as 96%. The permeate flux in MF was maintained at high values above 170 l m(-2) h(-1) at 3 bar for more than 2 h by backwashing the membrane with a compressed air every 6 min for 1 mm. The cake compression at high pressures was avoided by short filtration times between backwashing. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.",
journal = "Food and Bioproducts Processing",
title = "Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins",
volume = "91",
number = "C4",
pages = "473-480",
doi = "10.1016/j.fbp.2013.05.004"
}

Vladisavljević, G. T., Vukosavljevic, P.,& Veljović, M. S.. (2013). Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins. in Food and Bioproducts Processing, 91(C4), 473-480.
https://doi.org/10.1016/j.fbp.2013.05.004

Vladisavljević GT, Vukosavljevic P, Veljović MS. Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins. in Food and Bioproducts Processing. 2013;91(C4):473-480.
doi:10.1016/j.fbp.2013.05.004 .

Vladisavljević, Goran T., Vukosavljevic, Predrag, Veljović, Mile S., "Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins" in Food and Bioproducts Processing, 91, no. C4 (2013):473-480,
https://doi.org/10.1016/j.fbp.2013.05.004 . .

TY  - JOUR
AU  - Kumrić, Ksenija
AU  - Vladisavljević, Goran T.
AU  - Đorđević, Jelena S.
AU  - Jonsson, Jan Ake
AU  - Trtić-Petrović, Tatjana M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5044
AB  - In this study, the mass transport resistance in liquid-phase microextraction (LPME) in a single hollow fiber was investigated. A mathematical model has been developed for the determination of the overall mass transfer coefficient based on the acceptor phase in an unsteady state. The overall mass transfer coefficient in LPME in a single hollow fiber has been estimated from time-dependent concentration of extracted analyte in the acceptor phase while maintaining a constant analyte concentration in the donor phase. It can be achieved either using a high volume of donor to acceptor phase ratio or tuning the extraction conditions to obtain a low-enrichment factor, so that the analyte concentration in the sample is not significantly influenced by the mass transfer. Two extraction systems have been used to test experimentally the developed model: the extraction of Lu(III) from a buffer solution and the extraction of three local anesthetics from a buffer or plasma solution. The mass transfer resistance, defined as a reciprocal values of the mass transfer coefficient, was found to be 1.2 x 103 cm-1 min for Lu(III) under optimal conditions and from 1.96 to 3.3 x 103 cm-1 min for the local anesthetics depending on the acceptor pH and the hydrophobicity of the drug.
T2  - Journal of Separation Science
T1  - Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions
VL  - 35
IS  - 18
SP  - 2390
EP  - 2398
DO  - 10.1002/jssc.201200497
ER  - 

@article{
author = "Kumrić, Ksenija and Vladisavljević, Goran T. and Đorđević, Jelena S. and Jonsson, Jan Ake and Trtić-Petrović, Tatjana M.",
year = "2012",
abstract = "In this study, the mass transport resistance in liquid-phase microextraction (LPME) in a single hollow fiber was investigated. A mathematical model has been developed for the determination of the overall mass transfer coefficient based on the acceptor phase in an unsteady state. The overall mass transfer coefficient in LPME in a single hollow fiber has been estimated from time-dependent concentration of extracted analyte in the acceptor phase while maintaining a constant analyte concentration in the donor phase. It can be achieved either using a high volume of donor to acceptor phase ratio or tuning the extraction conditions to obtain a low-enrichment factor, so that the analyte concentration in the sample is not significantly influenced by the mass transfer. Two extraction systems have been used to test experimentally the developed model: the extraction of Lu(III) from a buffer solution and the extraction of three local anesthetics from a buffer or plasma solution. The mass transfer resistance, defined as a reciprocal values of the mass transfer coefficient, was found to be 1.2 x 103 cm-1 min for Lu(III) under optimal conditions and from 1.96 to 3.3 x 103 cm-1 min for the local anesthetics depending on the acceptor pH and the hydrophobicity of the drug.",
journal = "Journal of Separation Science",
title = "Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions",
volume = "35",
number = "18",
pages = "2390-2398",
doi = "10.1002/jssc.201200497"
}

Kumrić, K., Vladisavljević, G. T., Đorđević, J. S., Jonsson, J. A.,& Trtić-Petrović, T. M.. (2012). Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions. in Journal of Separation Science, 35(18), 2390-2398.
https://doi.org/10.1002/jssc.201200497

Kumrić K, Vladisavljević GT, Đorđević JS, Jonsson JA, Trtić-Petrović TM. Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions. in Journal of Separation Science. 2012;35(18):2390-2398.
doi:10.1002/jssc.201200497 .

Kumrić, Ksenija, Vladisavljević, Goran T., Đorđević, Jelena S., Jonsson, Jan Ake, Trtić-Petrović, Tatjana M., "Mass transfer resistance in a liquid-phase microextraction employing a single hollow fiber under unsteady-state conditions" in Journal of Separation Science, 35, no. 18 (2012):2390-2398,
https://doi.org/10.1002/jssc.201200497 . .

TY  - JOUR
AU  - Kumrić, Ksenija
AU  - Vladisavljević, Goran T.
AU  - Trtić-Petrović, Tatjana M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5147
AB  - Extraction of Lu(III) from an aqueous LuCl3 solution at pH 3.5 into an organic phase containing 5% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in di-n-hexyl ether (DHE) immobilized within a polypropylene hollow fiber membrane and a simultaneous back extraction of Lu(III) into 2 mol dm(-3) HCl solution has been investigated using two miniaturized supported liquid membrane (SLM) systems: (i) a single hollow fiber membrane, with stagnant acceptor phase in the lumen, immersed into a donor phase reservoir; and (ii) a U-shaped module containing a single hollow fiber membrane with a closed loop recirculation of aqueous phases through the module. In the stagnant SLM system, the maximum extraction efficiency was 8.8% due to limited acceptor volume and absence of flow within the lumen. In recirculating SLM system, after 80 mm of operation at the donor phase flow rate of 5.3 cm(3) min(-1), the acceptor phase flow rate of 0.4 cm(3) min(-1) and the donor-to-acceptor phase volume ratio of 6.7, the equilibrium removal efficiency of Lu(III) reached 88% and less than 5% of Lu(III) extracted from the feed solution was kept in the organic phase. For shell side flow of the donor phase at Reynolds numbers of Re = 3-34, the overall mass-transfer coefficient was proportional to the donor flow rate raised to the power of 0.63 and increased from 2.3 x 10(-5) m s(-1) to 8.8 x 10(-5) m s(-1). The rate-limiting step was the mass transfer of Lu(III) within the boundary layer of the donor phase adjacent to the outer wall of the hollow fiber.
T2  - Industrial and Engineering Chemistry Research
T1  - Membrane-Assisted Liquid-Phase Extraction of Lu(III) in a U-Shaped Contactor with a Single Hollow Fiber Membrane
VL  - 51
IS  - 43
SP  - 14199
EP  - 14208
DO  - 10.1021/ie301887h
ER  - 

@article{
author = "Kumrić, Ksenija and Vladisavljević, Goran T. and Trtić-Petrović, Tatjana M.",
year = "2012",
abstract = "Extraction of Lu(III) from an aqueous LuCl3 solution at pH 3.5 into an organic phase containing 5% (v/v) di(2-ethylhexyl)phosphoric acid (DEHPA) in di-n-hexyl ether (DHE) immobilized within a polypropylene hollow fiber membrane and a simultaneous back extraction of Lu(III) into 2 mol dm(-3) HCl solution has been investigated using two miniaturized supported liquid membrane (SLM) systems: (i) a single hollow fiber membrane, with stagnant acceptor phase in the lumen, immersed into a donor phase reservoir; and (ii) a U-shaped module containing a single hollow fiber membrane with a closed loop recirculation of aqueous phases through the module. In the stagnant SLM system, the maximum extraction efficiency was 8.8% due to limited acceptor volume and absence of flow within the lumen. In recirculating SLM system, after 80 mm of operation at the donor phase flow rate of 5.3 cm(3) min(-1), the acceptor phase flow rate of 0.4 cm(3) min(-1) and the donor-to-acceptor phase volume ratio of 6.7, the equilibrium removal efficiency of Lu(III) reached 88% and less than 5% of Lu(III) extracted from the feed solution was kept in the organic phase. For shell side flow of the donor phase at Reynolds numbers of Re = 3-34, the overall mass-transfer coefficient was proportional to the donor flow rate raised to the power of 0.63 and increased from 2.3 x 10(-5) m s(-1) to 8.8 x 10(-5) m s(-1). The rate-limiting step was the mass transfer of Lu(III) within the boundary layer of the donor phase adjacent to the outer wall of the hollow fiber.",
journal = "Industrial and Engineering Chemistry Research",
title = "Membrane-Assisted Liquid-Phase Extraction of Lu(III) in a U-Shaped Contactor with a Single Hollow Fiber Membrane",
volume = "51",
number = "43",
pages = "14199-14208",
doi = "10.1021/ie301887h"
}

Kumrić, K., Vladisavljević, G. T.,& Trtić-Petrović, T. M.. (2012). Membrane-Assisted Liquid-Phase Extraction of Lu(III) in a U-Shaped Contactor with a Single Hollow Fiber Membrane. in Industrial and Engineering Chemistry Research, 51(43), 14199-14208.
https://doi.org/10.1021/ie301887h

Kumrić K, Vladisavljević GT, Trtić-Petrović TM. Membrane-Assisted Liquid-Phase Extraction of Lu(III) in a U-Shaped Contactor with a Single Hollow Fiber Membrane. in Industrial and Engineering Chemistry Research. 2012;51(43):14199-14208.
doi:10.1021/ie301887h .

Kumrić, Ksenija, Vladisavljević, Goran T., Trtić-Petrović, Tatjana M., "Membrane-Assisted Liquid-Phase Extraction of Lu(III) in a U-Shaped Contactor with a Single Hollow Fiber Membrane" in Industrial and Engineering Chemistry Research, 51, no. 43 (2012):14199-14208,
https://doi.org/10.1021/ie301887h . .

TY  - CONF
AU  - Haigh, Kathleen F.
AU  - Abidin, Sumaiya Zainal
AU  - Saha, Basu
AU  - Vladisavljević, Goran T.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6981
AB  - Used cooking oil (UCO) offers a number of benefits for the production of biodiesel because it is a waste material and relatively cheap; however UCOs contain free fatty acids (FFAs) which need to be removed. Esterification can be used to convert the FFAs to biodiesel, and this work has compared two types of heterogeneous catalyst for esterification. An immobilized enzyme, Novozyme 435, was investigated because it has been shown to give a high conversion of FFAs and it has been compared to an ion-exchange resin, Purolite D5081, which was developed for the esterification of UCO for the production of biodiesel. It was found that a conversion of 94% was achieved using Purolite D5081 compared to 90% conversion with Novozyme 435.
C3  - Progress in Colloid and Polymer Science
T1  - Pretreatment of Used Cooking Oil for the Preparation of Biodiesel Using Heterogeneous Catalysis
VL  - 139
SP  - 19
EP  - +
DO  - 10.1007/978-3-642-28974-3_4
ER  - 

@conference{
author = "Haigh, Kathleen F. and Abidin, Sumaiya Zainal and Saha, Basu and Vladisavljević, Goran T.",
year = "2012",
abstract = "Used cooking oil (UCO) offers a number of benefits for the production of biodiesel because it is a waste material and relatively cheap; however UCOs contain free fatty acids (FFAs) which need to be removed. Esterification can be used to convert the FFAs to biodiesel, and this work has compared two types of heterogeneous catalyst for esterification. An immobilized enzyme, Novozyme 435, was investigated because it has been shown to give a high conversion of FFAs and it has been compared to an ion-exchange resin, Purolite D5081, which was developed for the esterification of UCO for the production of biodiesel. It was found that a conversion of 94% was achieved using Purolite D5081 compared to 90% conversion with Novozyme 435.",
journal = "Progress in Colloid and Polymer Science",
title = "Pretreatment of Used Cooking Oil for the Preparation of Biodiesel Using Heterogeneous Catalysis",
volume = "139",
pages = "19-+",
doi = "10.1007/978-3-642-28974-3_4"
}

Haigh, K. F., Abidin, S. Z., Saha, B.,& Vladisavljević, G. T.. (2012). Pretreatment of Used Cooking Oil for the Preparation of Biodiesel Using Heterogeneous Catalysis. in Progress in Colloid and Polymer Science, 139, 19-+.
https://doi.org/10.1007/978-3-642-28974-3_4

Haigh KF, Abidin SZ, Saha B, Vladisavljević GT. Pretreatment of Used Cooking Oil for the Preparation of Biodiesel Using Heterogeneous Catalysis. in Progress in Colloid and Polymer Science. 2012;139:19-+.
doi:10.1007/978-3-642-28974-3_4 .

Haigh, Kathleen F., Abidin, Sumaiya Zainal, Saha, Basu, Vladisavljević, Goran T., "Pretreatment of Used Cooking Oil for the Preparation of Biodiesel Using Heterogeneous Catalysis" in Progress in Colloid and Polymer Science, 139 (2012):19-+,
https://doi.org/10.1007/978-3-642-28974-3_4 . .

TY  - CONF
AU  - Vladisavljević, Goran T.
AU  - Shum, Ho Cheung
AU  - Weitz, David A.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6983
AB  - Monodisperse core/shell drops with aqueous core and poly(dimethylsiloxane) (PDMS) shell of controllable thickness have been produced using a glass microcapillary device that combines co-flow and flow-focusing geometries. The throughput of the droplet generation was high, with droplet generation frequency in the range from 1,000 to 10,000 Hz. The size of the droplets can be tuned by changing the flow rate of the continuous phase. The technique enables control over the shell thickness through adjusting the flow rate ratio of the middle to inner phase. As the flow rate of the middle and inner phase increases, the droplet breakup occurs in the dripping-to-jetting transition regime, with each double emulsion droplet containing two monodisperse internal aqueous droplets. The resultant drops can be used subsequently as templates for monodisperse polymer capsules with a single or multiple inner compartments, as well as functional vesicles such as liposomes, polymersomes and colloidosomes.
C3  - Progress in Colloid and Polymer Science
T1  - Control over the Shell Thickness of Core/Shell Drops in Three-Phase Glass Capillary Devices
VL  - 139
SP  - 115
EP  - +
DO  - 10.1007/978-3-642-28974-3_20
ER  - 

@conference{
author = "Vladisavljević, Goran T. and Shum, Ho Cheung and Weitz, David A.",
year = "2012",
abstract = "Monodisperse core/shell drops with aqueous core and poly(dimethylsiloxane) (PDMS) shell of controllable thickness have been produced using a glass microcapillary device that combines co-flow and flow-focusing geometries. The throughput of the droplet generation was high, with droplet generation frequency in the range from 1,000 to 10,000 Hz. The size of the droplets can be tuned by changing the flow rate of the continuous phase. The technique enables control over the shell thickness through adjusting the flow rate ratio of the middle to inner phase. As the flow rate of the middle and inner phase increases, the droplet breakup occurs in the dripping-to-jetting transition regime, with each double emulsion droplet containing two monodisperse internal aqueous droplets. The resultant drops can be used subsequently as templates for monodisperse polymer capsules with a single or multiple inner compartments, as well as functional vesicles such as liposomes, polymersomes and colloidosomes.",
journal = "Progress in Colloid and Polymer Science",
title = "Control over the Shell Thickness of Core/Shell Drops in Three-Phase Glass Capillary Devices",
volume = "139",
pages = "115-+",
doi = "10.1007/978-3-642-28974-3_20"
}

Vladisavljević, G. T., Shum, H. C.,& Weitz, D. A.. (2012). Control over the Shell Thickness of Core/Shell Drops in Three-Phase Glass Capillary Devices. in Progress in Colloid and Polymer Science, 139, 115-+.
https://doi.org/10.1007/978-3-642-28974-3_20

Vladisavljević GT, Shum HC, Weitz DA. Control over the Shell Thickness of Core/Shell Drops in Three-Phase Glass Capillary Devices. in Progress in Colloid and Polymer Science. 2012;139:115-+.
doi:10.1007/978-3-642-28974-3_20 .

Vladisavljević, Goran T., Shum, Ho Cheung, Weitz, David A., "Control over the Shell Thickness of Core/Shell Drops in Three-Phase Glass Capillary Devices" in Progress in Colloid and Polymer Science, 139 (2012):115-+,
https://doi.org/10.1007/978-3-642-28974-3_20 . .

TY  - CONF
AU  - Vladisavljević, Goran T.
AU  - Henry, J. V.
AU  - Duncanson, Wynter J.
AU  - Shum, Ho C.
AU  - Weitz, David A.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6982
AB  - Monodisperse poly(dl-lactic acid) (PLA) particles with a diameter in the range from 12 to 100 mu m were fabricated in flow focusing glass capillary devices by evaporation of dichloromethane (DCM) from emulsions at room temperature. The dispersed phase was 5% (w/w) PLA in DCM containing a small amount of Nile red and the continuous phase was 5% (w/w) poly(vinyl alcohol) in reverse osmosis water. Particle diameter was 2.7 times smaller than the size of the emulsion droplet template indicating that the particle porosity was very low. SEM images revealed that the majority of particle pores are in the sub-micron region but in some instances these pores can reach 3 mu m in diameter. Droplet diameter was influenced by the flow rates of the two phases and the entry diameter of the collection capillary tube; droplet diameters decreased with increasing values of the flow rate ratio of the dispersed to continuous phase to reach constant minimum values at 40-60% orifice diameter. At flow rate ratios less than 5, jetting can occur, giving rise to large droplets formed by detachment from relatively long jets (similar to 10 times longer than droplet diameter).
C3  - Progress in Colloid and Polymer Science
T1  - Fabrication of Biodegradable Poly(Lactic Acid) Particles in Flow-Focusing Glass Capillary Devices
VL  - 139
SP  - 111
EP  - +
DO  - 10.1007/978-3-642-28974-3_19
ER  - 

@conference{
author = "Vladisavljević, Goran T. and Henry, J. V. and Duncanson, Wynter J. and Shum, Ho C. and Weitz, David A.",
year = "2012",
abstract = "Monodisperse poly(dl-lactic acid) (PLA) particles with a diameter in the range from 12 to 100 mu m were fabricated in flow focusing glass capillary devices by evaporation of dichloromethane (DCM) from emulsions at room temperature. The dispersed phase was 5% (w/w) PLA in DCM containing a small amount of Nile red and the continuous phase was 5% (w/w) poly(vinyl alcohol) in reverse osmosis water. Particle diameter was 2.7 times smaller than the size of the emulsion droplet template indicating that the particle porosity was very low. SEM images revealed that the majority of particle pores are in the sub-micron region but in some instances these pores can reach 3 mu m in diameter. Droplet diameter was influenced by the flow rates of the two phases and the entry diameter of the collection capillary tube; droplet diameters decreased with increasing values of the flow rate ratio of the dispersed to continuous phase to reach constant minimum values at 40-60% orifice diameter. At flow rate ratios less than 5, jetting can occur, giving rise to large droplets formed by detachment from relatively long jets (similar to 10 times longer than droplet diameter).",
journal = "Progress in Colloid and Polymer Science",
title = "Fabrication of Biodegradable Poly(Lactic Acid) Particles in Flow-Focusing Glass Capillary Devices",
volume = "139",
pages = "111-+",
doi = "10.1007/978-3-642-28974-3_19"
}

Vladisavljević, G. T., Henry, J. V., Duncanson, W. J., Shum, H. C.,& Weitz, D. A.. (2012). Fabrication of Biodegradable Poly(Lactic Acid) Particles in Flow-Focusing Glass Capillary Devices. in Progress in Colloid and Polymer Science, 139, 111-+.
https://doi.org/10.1007/978-3-642-28974-3_19

Vladisavljević GT, Henry JV, Duncanson WJ, Shum HC, Weitz DA. Fabrication of Biodegradable Poly(Lactic Acid) Particles in Flow-Focusing Glass Capillary Devices. in Progress in Colloid and Polymer Science. 2012;139:111-+.
doi:10.1007/978-3-642-28974-3_19 .

Vladisavljević, Goran T., Henry, J. V., Duncanson, Wynter J., Shum, Ho C., Weitz, David A., "Fabrication of Biodegradable Poly(Lactic Acid) Particles in Flow-Focusing Glass Capillary Devices" in Progress in Colloid and Polymer Science, 139 (2012):111-+,
https://doi.org/10.1007/978-3-642-28974-3_19 . .

TY  - CONF
AU  - Dragosavac, Marijana M.
AU  - Vladisavljević, Goran T.
AU  - Holdich, Richard G.
AU  - Stillwell, Michael T.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6980
AB  - A membrane emulsification method for production of monodispersed silica-based ion exchange particles through water-in-oil emulsion route is developed. A hydrophobic microsieve membrane with 15 mu m pore size and 200 pm pore spacing was used to produce droplets, with a mean size between 65 and 240 pm containing acidified sodium silicate solution (with 4 and 6 wt% SiO2) in kerosene. After drying, the final silica particles had a mean size in the range between 30 and 70 mu m. Coefficient of variation for both the droplets and particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. The particles were functionalised with 3-aminopropyltrimethoxysilane and used for chemisorption of Cu(II) from an aqueous solution of CuSO4 in a continuous flow stirred cell with slotted pore microfiltration membrane. Functionalised silica particles showed a higher binding affinity toward Cu(II) than nontreated silica particles.
C3  - Progress in Colloid and Polymer Science
T1  - Novel Membrane Emulsification Method of Producing Highly Uniform Silica Particles Using Inexpensive Silica Sources
VL  - 139
SP  - 7
EP  - +
DO  - 10.1007/978-3-642-28974-3_2
ER  - 

@conference{
author = "Dragosavac, Marijana M. and Vladisavljević, Goran T. and Holdich, Richard G. and Stillwell, Michael T.",
year = "2012",
abstract = "A membrane emulsification method for production of monodispersed silica-based ion exchange particles through water-in-oil emulsion route is developed. A hydrophobic microsieve membrane with 15 mu m pore size and 200 pm pore spacing was used to produce droplets, with a mean size between 65 and 240 pm containing acidified sodium silicate solution (with 4 and 6 wt% SiO2) in kerosene. After drying, the final silica particles had a mean size in the range between 30 and 70 mu m. Coefficient of variation for both the droplets and particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. The particles were functionalised with 3-aminopropyltrimethoxysilane and used for chemisorption of Cu(II) from an aqueous solution of CuSO4 in a continuous flow stirred cell with slotted pore microfiltration membrane. Functionalised silica particles showed a higher binding affinity toward Cu(II) than nontreated silica particles.",
journal = "Progress in Colloid and Polymer Science",
title = "Novel Membrane Emulsification Method of Producing Highly Uniform Silica Particles Using Inexpensive Silica Sources",
volume = "139",
pages = "7-+",
doi = "10.1007/978-3-642-28974-3_2"
}

Dragosavac, M. M., Vladisavljević, G. T., Holdich, R. G.,& Stillwell, M. T.. (2012). Novel Membrane Emulsification Method of Producing Highly Uniform Silica Particles Using Inexpensive Silica Sources. in Progress in Colloid and Polymer Science, 139, 7-+.
https://doi.org/10.1007/978-3-642-28974-3_2

Dragosavac MM, Vladisavljević GT, Holdich RG, Stillwell MT. Novel Membrane Emulsification Method of Producing Highly Uniform Silica Particles Using Inexpensive Silica Sources. in Progress in Colloid and Polymer Science. 2012;139:7-+.
doi:10.1007/978-3-642-28974-3_2 .

Dragosavac, Marijana M., Vladisavljević, Goran T., Holdich, Richard G., Stillwell, Michael T., "Novel Membrane Emulsification Method of Producing Highly Uniform Silica Particles Using Inexpensive Silica Sources" in Progress in Colloid and Polymer Science, 139 (2012):7-+,
https://doi.org/10.1007/978-3-642-28974-3_2 . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
AU  - Duncanson, Wynter J.
AU  - Shum, Ho Cheung
AU  - Weitz, David A.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5039
AB  - Monodisperse poly(DL-lactic acid) (PLA) particles of diameters between 11 and 121 mu m were fabricated in flow focusing glass microcapillary devices by evaporation of dichloromethane (DCM) from emulsion droplets at room temperature. The dispersed phase was 5% (w/w) PLA in DCM containing 0.1-2 mM Nile Red and the continuous phase was 5% (w/w) poly(vinyl alcohol) in reverse osmosis water. Particle diameter was 2.7 times smaller than the diameter of the emulsion droplet template, indicating very low particle porosity. Monodisperse droplets have only been produced under dripping regime using a wide range of dispersed phase flow rates (0.002-7.2 cm(3).h(-1)), continuous phase flow rates (0.3-30 cm(3).h(-1)), and orifice diameters (50-237 mu m). In the dripping regime, the ratio of droplet diameter to orifice diameter was inversely proportional to the 0.39 power of the ratio of the continuous phase flow rate to dispersed phase flow rate. Highly uniform droplets with a coefficient of variation (CV) below 2% and a ratio of the droplet diameter to orifice diameter of 0.5-1 were obtained at flow rate ratios of 4-25. Under jetting regime, polydisperse droplets (CV GT 6%) were formed by detachment from relatively long jets (between 4 and 10 times longer than droplet diameter) and a ratio of the droplet size to orifice size of 2-5.
T2  - Langmuir
T1  - Emulsion Templating of Poly(lactic acid) Particles: Droplet Formation Behavior
VL  - 28
IS  - 36
SP  - 12948
EP  - 12954
DO  - 10.1021/la302092f
ER  - 

@article{
author = "Vladisavljević, Goran T. and Duncanson, Wynter J. and Shum, Ho Cheung and Weitz, David A.",
year = "2012",
abstract = "Monodisperse poly(DL-lactic acid) (PLA) particles of diameters between 11 and 121 mu m were fabricated in flow focusing glass microcapillary devices by evaporation of dichloromethane (DCM) from emulsion droplets at room temperature. The dispersed phase was 5% (w/w) PLA in DCM containing 0.1-2 mM Nile Red and the continuous phase was 5% (w/w) poly(vinyl alcohol) in reverse osmosis water. Particle diameter was 2.7 times smaller than the diameter of the emulsion droplet template, indicating very low particle porosity. Monodisperse droplets have only been produced under dripping regime using a wide range of dispersed phase flow rates (0.002-7.2 cm(3).h(-1)), continuous phase flow rates (0.3-30 cm(3).h(-1)), and orifice diameters (50-237 mu m). In the dripping regime, the ratio of droplet diameter to orifice diameter was inversely proportional to the 0.39 power of the ratio of the continuous phase flow rate to dispersed phase flow rate. Highly uniform droplets with a coefficient of variation (CV) below 2% and a ratio of the droplet diameter to orifice diameter of 0.5-1 were obtained at flow rate ratios of 4-25. Under jetting regime, polydisperse droplets (CV GT 6%) were formed by detachment from relatively long jets (between 4 and 10 times longer than droplet diameter) and a ratio of the droplet size to orifice size of 2-5.",
journal = "Langmuir",
title = "Emulsion Templating of Poly(lactic acid) Particles: Droplet Formation Behavior",
volume = "28",
number = "36",
pages = "12948-12954",
doi = "10.1021/la302092f"
}

Vladisavljević, G. T., Duncanson, W. J., Shum, H. C.,& Weitz, D. A.. (2012). Emulsion Templating of Poly(lactic acid) Particles: Droplet Formation Behavior. in Langmuir, 28(36), 12948-12954.
https://doi.org/10.1021/la302092f

Vladisavljević GT, Duncanson WJ, Shum HC, Weitz DA. Emulsion Templating of Poly(lactic acid) Particles: Droplet Formation Behavior. in Langmuir. 2012;28(36):12948-12954.
doi:10.1021/la302092f .

Vladisavljević, Goran T., Duncanson, Wynter J., Shum, Ho Cheung, Weitz, David A., "Emulsion Templating of Poly(lactic acid) Particles: Droplet Formation Behavior" in Langmuir, 28, no. 36 (2012):12948-12954,
https://doi.org/10.1021/la302092f . .

TY  - JOUR
AU  - Dragosavac, Marijana M.
AU  - Holdich, Richard G.
AU  - Vladisavljević, Goran T.
AU  - Sovilj, Milan N.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4717
AB  - Stirred cell membrane emulsification was used to create double water-in-oil-in-water emulsions at the dispersed phase flux of up to 3200 L m(-2) h(-1). The oil phase was unrefined pumpkin seed oil or sunflower oil containing 30% by volume of internal water phase and the external water phase was 2% Tween 20 (polyoxyethylene sorbitan monolaurate) or 2% Pluronic F-68 (polyoxyethylene-polyoxypropylen copolymer). Using microengineered nickel membranes with pore sizes between 15 and 40 mu m, median drop sizes of double emulsion droplets were in the range between 100 and 430 mu m, depending mainly on the shear at the membrane surface and dispersed phase injection rate. In most cases the drops were very uniform, with span (i.e. 90% drop size minus 10% drop size divided by median size) values of around 0.5. This data is similar to what was obtained previously for simple O/W emulsions of the same materials. Hence, the internal water phase, and internal surfactant, 5% PGPR (polyglycerol polyricinoleate), did not adversely influence the emulsification process. A marker material, copper sulfate, was added to the internal water phase and the release of copper was monitored with respect to time. For both lipid systems, at the larger droplet size, there was a significant period of no copper release, followed by almost linear release with time. This initial period was absent when the drop size was close to 100 mu m. The initial entrapment efficiency of the copper, in all experiments, was higher than 94%. (C) 2011 Elsevier B. V. All rights reserved.
T2  - Journal of Membrane Science
T1  - Stirred cell membrane emulsification for multiple emulsions containing unrefined pumpkin seed oil with uniform droplet size
VL  - 392
SP  - 122
EP  - 129
DO  - 10.1016/j.memsci.2011.12.009
ER  - 

@article{
author = "Dragosavac, Marijana M. and Holdich, Richard G. and Vladisavljević, Goran T. and Sovilj, Milan N.",
year = "2012",
abstract = "Stirred cell membrane emulsification was used to create double water-in-oil-in-water emulsions at the dispersed phase flux of up to 3200 L m(-2) h(-1). The oil phase was unrefined pumpkin seed oil or sunflower oil containing 30% by volume of internal water phase and the external water phase was 2% Tween 20 (polyoxyethylene sorbitan monolaurate) or 2% Pluronic F-68 (polyoxyethylene-polyoxypropylen copolymer). Using microengineered nickel membranes with pore sizes between 15 and 40 mu m, median drop sizes of double emulsion droplets were in the range between 100 and 430 mu m, depending mainly on the shear at the membrane surface and dispersed phase injection rate. In most cases the drops were very uniform, with span (i.e. 90% drop size minus 10% drop size divided by median size) values of around 0.5. This data is similar to what was obtained previously for simple O/W emulsions of the same materials. Hence, the internal water phase, and internal surfactant, 5% PGPR (polyglycerol polyricinoleate), did not adversely influence the emulsification process. A marker material, copper sulfate, was added to the internal water phase and the release of copper was monitored with respect to time. For both lipid systems, at the larger droplet size, there was a significant period of no copper release, followed by almost linear release with time. This initial period was absent when the drop size was close to 100 mu m. The initial entrapment efficiency of the copper, in all experiments, was higher than 94%. (C) 2011 Elsevier B. V. All rights reserved.",
journal = "Journal of Membrane Science",
title = "Stirred cell membrane emulsification for multiple emulsions containing unrefined pumpkin seed oil with uniform droplet size",
volume = "392",
pages = "122-129",
doi = "10.1016/j.memsci.2011.12.009"
}

Dragosavac, M. M., Holdich, R. G., Vladisavljević, G. T.,& Sovilj, M. N.. (2012). Stirred cell membrane emulsification for multiple emulsions containing unrefined pumpkin seed oil with uniform droplet size. in Journal of Membrane Science, 392, 122-129.
https://doi.org/10.1016/j.memsci.2011.12.009

Dragosavac MM, Holdich RG, Vladisavljević GT, Sovilj MN. Stirred cell membrane emulsification for multiple emulsions containing unrefined pumpkin seed oil with uniform droplet size. in Journal of Membrane Science. 2012;392:122-129.
doi:10.1016/j.memsci.2011.12.009 .

Dragosavac, Marijana M., Holdich, Richard G., Vladisavljević, Goran T., Sovilj, Milan N., "Stirred cell membrane emulsification for multiple emulsions containing unrefined pumpkin seed oil with uniform droplet size" in Journal of Membrane Science, 392 (2012):122-129,
https://doi.org/10.1016/j.memsci.2011.12.009 . .

TY  - JOUR
AU  - Dragosavac, Marijana M.
AU  - Vladisavljević, Goran T.
AU  - Holdich, Richard G.
AU  - Stillwell, Michael T.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4644
AB  - A method for the production of near-monodispersed spherical silica particles with controllable porosity based on the formation of uniform emulsion droplets using membrane emulsification is described. A hydrophobic metal membrane with a 15 mu m pore size and 200 mu m pore spacing was used to produce near-monodispersed droplets, with a mean size that could be controlled between 65 and 240 mu m containing acidified sodium silicate solution (with 4 and 6 wt % SiO(2)) in kerosene. After drying and shrinking, the final silica particles had a mean size in the range between 30 and 70 mu m. The coefficient of variation for both the droplets and the particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. By altering the pH of the sodium silicate solution and aging the gel particles in water or acetone, the internal structure of the silica particles was successfully modified, and both micro- and mesoporous near-monodispersed spherical particles were produced with an average internal pore size between 1 and 6 nm and an average surface area between 360 and 750 m(2) g(-1). A material balance and particle size analysis provided identical values for the internal voidage of the particles, when compared to the voidage as determined by BET analysis.
T2  - Langmuir
T1  - Production of Porous Silica Microparticles by Membrane Emulsification
VL  - 28
IS  - 1
SP  - 134
EP  - 143
DO  - 10.1021/la202974b
ER  - 

@article{
author = "Dragosavac, Marijana M. and Vladisavljević, Goran T. and Holdich, Richard G. and Stillwell, Michael T.",
year = "2012",
abstract = "A method for the production of near-monodispersed spherical silica particles with controllable porosity based on the formation of uniform emulsion droplets using membrane emulsification is described. A hydrophobic metal membrane with a 15 mu m pore size and 200 mu m pore spacing was used to produce near-monodispersed droplets, with a mean size that could be controlled between 65 and 240 mu m containing acidified sodium silicate solution (with 4 and 6 wt % SiO(2)) in kerosene. After drying and shrinking, the final silica particles had a mean size in the range between 30 and 70 mu m. The coefficient of variation for both the droplets and the particles did not exceed 35%. The most uniform particles had a mean diameter of 40 mu m and coefficient of variation of 17%. By altering the pH of the sodium silicate solution and aging the gel particles in water or acetone, the internal structure of the silica particles was successfully modified, and both micro- and mesoporous near-monodispersed spherical particles were produced with an average internal pore size between 1 and 6 nm and an average surface area between 360 and 750 m(2) g(-1). A material balance and particle size analysis provided identical values for the internal voidage of the particles, when compared to the voidage as determined by BET analysis.",
journal = "Langmuir",
title = "Production of Porous Silica Microparticles by Membrane Emulsification",
volume = "28",
number = "1",
pages = "134-143",
doi = "10.1021/la202974b"
}

Dragosavac, M. M., Vladisavljević, G. T., Holdich, R. G.,& Stillwell, M. T.. (2012). Production of Porous Silica Microparticles by Membrane Emulsification. in Langmuir, 28(1), 134-143.
https://doi.org/10.1021/la202974b

Dragosavac MM, Vladisavljević GT, Holdich RG, Stillwell MT. Production of Porous Silica Microparticles by Membrane Emulsification. in Langmuir. 2012;28(1):134-143.
doi:10.1021/la202974b .

Dragosavac, Marijana M., Vladisavljević, Goran T., Holdich, Richard G., Stillwell, Michael T., "Production of Porous Silica Microparticles by Membrane Emulsification" in Langmuir, 28, no. 1 (2012):134-143,
https://doi.org/10.1021/la202974b . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
AU  - Kobayashi, Isao
AU  - Nakajima, Mitsutoshi
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4310
AB  - Uniformly sized droplets of soybean oil, MCT (medium-chain fatty acid triglyceride) oil and n-tetradecane with a Sauter mean diameter of d (3,2) = 26-35 mu m and a distribution span of 0.21-0.25 have been produced at high throughputs using a 24 x 24 mm silicon microchannel plate consisting of 23,348 asymmetric channels fabricated by photolithography and deep reactive ion etching. Each channel consisted of a 10-mu m diameter straight-through micro-hole with a length of 70 mu m and a 50 x 10 mu m micro-slot with a depth of 30 mu m at the outlet of each channel. The maximum dispersed phase flux for monodisperse emulsion generation increased with decreasing dispersed phase viscosity and ranged from over 120 L m(-2) h(-1) for soybean oil to 2,700 L m(-2) h(-1) for n-tetradecane. The droplet generation frequency showed significant channel to channel variations and increased with decreasing viscosity of the dispersed phase. For n-tetradecane, the maximum mean droplet generation frequency was 250 Hz per single active channel, corresponding to the overall throughput in the device of 3.2 million droplets per second. The proportion of active channels at high throughputs approached 100% for soybean oil and MCT oil, and 50% for n-tetradecane. The agreement between the experimental and CFD (Computational Fluid Dynamics) results was excellent for soybean oil and the poorest for n-tetradecane.
T2  - Microfluidics and Nanofluidics
T1  - Effect of dispersed phase viscosity on maximum droplet generation frequency in microchannel emulsification using asymmetric straight-through channels
VL  - 10
IS  - 6
SP  - 1199
EP  - 1209
DO  - 10.1007/s10404-010-0750-9
ER  - 

@article{
author = "Vladisavljević, Goran T. and Kobayashi, Isao and Nakajima, Mitsutoshi",
year = "2011",
abstract = "Uniformly sized droplets of soybean oil, MCT (medium-chain fatty acid triglyceride) oil and n-tetradecane with a Sauter mean diameter of d (3,2) = 26-35 mu m and a distribution span of 0.21-0.25 have been produced at high throughputs using a 24 x 24 mm silicon microchannel plate consisting of 23,348 asymmetric channels fabricated by photolithography and deep reactive ion etching. Each channel consisted of a 10-mu m diameter straight-through micro-hole with a length of 70 mu m and a 50 x 10 mu m micro-slot with a depth of 30 mu m at the outlet of each channel. The maximum dispersed phase flux for monodisperse emulsion generation increased with decreasing dispersed phase viscosity and ranged from over 120 L m(-2) h(-1) for soybean oil to 2,700 L m(-2) h(-1) for n-tetradecane. The droplet generation frequency showed significant channel to channel variations and increased with decreasing viscosity of the dispersed phase. For n-tetradecane, the maximum mean droplet generation frequency was 250 Hz per single active channel, corresponding to the overall throughput in the device of 3.2 million droplets per second. The proportion of active channels at high throughputs approached 100% for soybean oil and MCT oil, and 50% for n-tetradecane. The agreement between the experimental and CFD (Computational Fluid Dynamics) results was excellent for soybean oil and the poorest for n-tetradecane.",
journal = "Microfluidics and Nanofluidics",
title = "Effect of dispersed phase viscosity on maximum droplet generation frequency in microchannel emulsification using asymmetric straight-through channels",
volume = "10",
number = "6",
pages = "1199-1209",
doi = "10.1007/s10404-010-0750-9"
}

Vladisavljević, G. T., Kobayashi, I.,& Nakajima, M.. (2011). Effect of dispersed phase viscosity on maximum droplet generation frequency in microchannel emulsification using asymmetric straight-through channels. in Microfluidics and Nanofluidics, 10(6), 1199-1209.
https://doi.org/10.1007/s10404-010-0750-9

Vladisavljević GT, Kobayashi I, Nakajima M. Effect of dispersed phase viscosity on maximum droplet generation frequency in microchannel emulsification using asymmetric straight-through channels. in Microfluidics and Nanofluidics. 2011;10(6):1199-1209.
doi:10.1007/s10404-010-0750-9 .

Vladisavljević, Goran T., Kobayashi, Isao, Nakajima, Mitsutoshi, "Effect of dispersed phase viscosity on maximum droplet generation frequency in microchannel emulsification using asymmetric straight-through channels" in Microfluidics and Nanofluidics, 10, no. 6 (2011):1199-1209,
https://doi.org/10.1007/s10404-010-0750-9 . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Kumrić, Ksenija
AU  - Đorđević, Jelena S.
AU  - Vladisavljević, Goran T.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4058
AB  - Transport behaviour of Lu(III) across a polypropylene hollow fibre-supported liquid membrane containing di(2-ethylhexyl)phosphoric acid (DEHPA) in dihexyl ether as a carrier has been studied. The donor phase was LuCl(3) in the buffer solution consisting of 0.2 M sodium acetate at pH 2.5-5.0. A miniaturised system with a single hollow fibre has been operated in a batch mode. The concentration of Lu(III) was determined by indirect voltammetric method using Zn-EDTA complex. The effect of pH and volume of the donor phase, DEHPA concentration in the organic (liquid membrane) phase, the time of extraction and the content of the acceptor phase on the Lu(III) extraction and stripping behaviour was investigated. The results were discussed in terms of the pertraction and removal efficiency, the memory effect and the mean flux of Lu(III). The optimal conditions for the removal of (177)Lu(III) from labelled (177)Lu-radiopharmaceuticals were discussed and identified. The removal efficiency of Lu(III) greater than 99% was achieved at pH of the donor phase between 3.5 and 5.0 using DEHPA concentration in the organic phase of 0.47 M and the ratio of the donor to the acceptor phase of 182.
T2  - Journal of Separation Science
T1  - Extraction of lutetium(III) from aqueous solutions by employing a single fibre-supported liquid membrane
VL  - 33
IS  - 13
SP  - 2002
EP  - 2009
DO  - 10.1002/jssc.201000042
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Kumrić, Ksenija and Đorđević, Jelena S. and Vladisavljević, Goran T.",
year = "2010",
abstract = "Transport behaviour of Lu(III) across a polypropylene hollow fibre-supported liquid membrane containing di(2-ethylhexyl)phosphoric acid (DEHPA) in dihexyl ether as a carrier has been studied. The donor phase was LuCl(3) in the buffer solution consisting of 0.2 M sodium acetate at pH 2.5-5.0. A miniaturised system with a single hollow fibre has been operated in a batch mode. The concentration of Lu(III) was determined by indirect voltammetric method using Zn-EDTA complex. The effect of pH and volume of the donor phase, DEHPA concentration in the organic (liquid membrane) phase, the time of extraction and the content of the acceptor phase on the Lu(III) extraction and stripping behaviour was investigated. The results were discussed in terms of the pertraction and removal efficiency, the memory effect and the mean flux of Lu(III). The optimal conditions for the removal of (177)Lu(III) from labelled (177)Lu-radiopharmaceuticals were discussed and identified. The removal efficiency of Lu(III) greater than 99% was achieved at pH of the donor phase between 3.5 and 5.0 using DEHPA concentration in the organic phase of 0.47 M and the ratio of the donor to the acceptor phase of 182.",
journal = "Journal of Separation Science",
title = "Extraction of lutetium(III) from aqueous solutions by employing a single fibre-supported liquid membrane",
volume = "33",
number = "13",
pages = "2002-2009",
doi = "10.1002/jssc.201000042"
}

Trtić-Petrović, T. M., Kumrić, K., Đorđević, J. S.,& Vladisavljević, G. T.. (2010). Extraction of lutetium(III) from aqueous solutions by employing a single fibre-supported liquid membrane. in Journal of Separation Science, 33(13), 2002-2009.
https://doi.org/10.1002/jssc.201000042

Trtić-Petrović TM, Kumrić K, Đorđević JS, Vladisavljević GT. Extraction of lutetium(III) from aqueous solutions by employing a single fibre-supported liquid membrane. in Journal of Separation Science. 2010;33(13):2002-2009.
doi:10.1002/jssc.201000042 .

Trtić-Petrović, Tatjana M., Kumrić, Ksenija, Đorđević, Jelena S., Vladisavljević, Goran T., "Extraction of lutetium(III) from aqueous solutions by employing a single fibre-supported liquid membrane" in Journal of Separation Science, 33, no. 13 (2010):2002-2009,
https://doi.org/10.1002/jssc.201000042 . .

TY  - JOUR
AU  - Vladisavljević, Goran T.
AU  - McClements, D. Julian
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4041
AB  - This study examined the possibility of modifying the interfacial characteristics of uniformly sized droplets produced by premix membrane emulsification using surfactant-displacement and/or electrostatic deposition methods. The non-ionic surfactant Tween 20 is particularly effective at producing uniformly sized lipid droplets by premix membrane emulsification, but the droplets produced have a low net charge. The interfacial characteristics of emulsion droplets initially coated by Tween 20 could be made either negative or positive (without altering droplet size) by adding controlled amounts of either anionic emulsifiers (SDS) or cationic emulsifiers (DTAB or beta-lactoglobulin) to the continuous phase after homogenisation. In addition, cationic emulsion droplets could be prepared by depositing a cationic biopolymer (chitosan) onto the surfaces of anionic droplets (SDS/Tween coated). These results have important consequences for the design, fabrication and utilisation of uniformly sized lipid droplets with controlled interfacial characteristics. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Modification of interfacial characteristics of monodisperse droplets produced using membrane emulsification by surfactant displacement and/or polyelectrolyte electrostatic deposition
VL  - 364
IS  - 1-3
SP  - 123
EP  - 131
DO  - 10.1016/j.colsurfa.2010.05.006
ER  - 

@article{
author = "Vladisavljević, Goran T. and McClements, D. Julian",
year = "2010",
abstract = "This study examined the possibility of modifying the interfacial characteristics of uniformly sized droplets produced by premix membrane emulsification using surfactant-displacement and/or electrostatic deposition methods. The non-ionic surfactant Tween 20 is particularly effective at producing uniformly sized lipid droplets by premix membrane emulsification, but the droplets produced have a low net charge. The interfacial characteristics of emulsion droplets initially coated by Tween 20 could be made either negative or positive (without altering droplet size) by adding controlled amounts of either anionic emulsifiers (SDS) or cationic emulsifiers (DTAB or beta-lactoglobulin) to the continuous phase after homogenisation. In addition, cationic emulsion droplets could be prepared by depositing a cationic biopolymer (chitosan) onto the surfaces of anionic droplets (SDS/Tween coated). These results have important consequences for the design, fabrication and utilisation of uniformly sized lipid droplets with controlled interfacial characteristics. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Modification of interfacial characteristics of monodisperse droplets produced using membrane emulsification by surfactant displacement and/or polyelectrolyte electrostatic deposition",
volume = "364",
number = "1-3",
pages = "123-131",
doi = "10.1016/j.colsurfa.2010.05.006"
}

Vladisavljević, G. T.,& McClements, D. J.. (2010). Modification of interfacial characteristics of monodisperse droplets produced using membrane emulsification by surfactant displacement and/or polyelectrolyte electrostatic deposition. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 364(1-3), 123-131.
https://doi.org/10.1016/j.colsurfa.2010.05.006

Vladisavljević GT, McClements DJ. Modification of interfacial characteristics of monodisperse droplets produced using membrane emulsification by surfactant displacement and/or polyelectrolyte electrostatic deposition. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2010;364(1-3):123-131.
doi:10.1016/j.colsurfa.2010.05.006 .

Vladisavljević, Goran T., McClements, D. Julian, "Modification of interfacial characteristics of monodisperse droplets produced using membrane emulsification by surfactant displacement and/or polyelectrolyte electrostatic deposition" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 364, no. 1-3 (2010):123-131,
https://doi.org/10.1016/j.colsurfa.2010.05.006 . .

TY  - JOUR
AU  - Mark, Daniel
AU  - Haeberle, Stefan
AU  - Zengerle, Roland
AU  - Ducree, Jens
AU  - Vladisavljević, Goran T.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3735
AB  - A centrifugally driven pulse-free flow has been used for generation of tripolyphosphate (TPP)-gelated chitosan beads with tunable diameters ranging from 148 to 257 pm. The production process requires a single motor as the sole actively actuated component. The 2% (w/w) chitosan solution was extruded through a polymeric nozzle with an inner diameter of 127 mu m in the centrifugal field ranging from 93 to 452g and the drops were collected in an Eppendorf tube containing 10% (w/w) TPP Solution at pH 4.0. The reproducibility of the bead diameters out of different nozzles was very good with overall CVs of the bead diameters down to 15% and the production rate was 45 beads per second per nozzle at 44 Hz rotor frequency. The production rate was proportional to the sixth power of the rotor frequency, which was explained by the non-Newtonian behaviour of the chitosan solution with a flow behaviour index of 0.466. An analytical model for the bead diameter and production rate has been presented and validated by the experimental data. The shrinkage of chitosan drops during gelation was estimated from the observations and the theoretical model. (C) 2009 Elsevier Inc. All rights reserved
T2  - Journal of Colloid and Interface Science
T1  - Manufacture of chitosan microbeads using centrifugally driven flow of gel-forming solutions through a polymeric micronozzle
VL  - 336
IS  - 2
SP  - 634
EP  - 641
DO  - 10.1016/j.jcis.2009.04.029
ER  - 

@article{
author = "Mark, Daniel and Haeberle, Stefan and Zengerle, Roland and Ducree, Jens and Vladisavljević, Goran T.",
year = "2009",
abstract = "A centrifugally driven pulse-free flow has been used for generation of tripolyphosphate (TPP)-gelated chitosan beads with tunable diameters ranging from 148 to 257 pm. The production process requires a single motor as the sole actively actuated component. The 2% (w/w) chitosan solution was extruded through a polymeric nozzle with an inner diameter of 127 mu m in the centrifugal field ranging from 93 to 452g and the drops were collected in an Eppendorf tube containing 10% (w/w) TPP Solution at pH 4.0. The reproducibility of the bead diameters out of different nozzles was very good with overall CVs of the bead diameters down to 15% and the production rate was 45 beads per second per nozzle at 44 Hz rotor frequency. The production rate was proportional to the sixth power of the rotor frequency, which was explained by the non-Newtonian behaviour of the chitosan solution with a flow behaviour index of 0.466. An analytical model for the bead diameter and production rate has been presented and validated by the experimental data. The shrinkage of chitosan drops during gelation was estimated from the observations and the theoretical model. (C) 2009 Elsevier Inc. All rights reserved",
journal = "Journal of Colloid and Interface Science",
title = "Manufacture of chitosan microbeads using centrifugally driven flow of gel-forming solutions through a polymeric micronozzle",
volume = "336",
number = "2",
pages = "634-641",
doi = "10.1016/j.jcis.2009.04.029"
}

Mark, D., Haeberle, S., Zengerle, R., Ducree, J.,& Vladisavljević, G. T.. (2009). Manufacture of chitosan microbeads using centrifugally driven flow of gel-forming solutions through a polymeric micronozzle. in Journal of Colloid and Interface Science, 336(2), 634-641.
https://doi.org/10.1016/j.jcis.2009.04.029

Mark D, Haeberle S, Zengerle R, Ducree J, Vladisavljević GT. Manufacture of chitosan microbeads using centrifugally driven flow of gel-forming solutions through a polymeric micronozzle. in Journal of Colloid and Interface Science. 2009;336(2):634-641.
doi:10.1016/j.jcis.2009.04.029 .

Mark, Daniel, Haeberle, Stefan, Zengerle, Roland, Ducree, Jens, Vladisavljević, Goran T., "Manufacture of chitosan microbeads using centrifugally driven flow of gel-forming solutions through a polymeric micronozzle" in Journal of Colloid and Interface Science, 336, no. 2 (2009):634-641,
https://doi.org/10.1016/j.jcis.2009.04.029 . .

TY  - JOUR
AU  - Dragosavac, Marijana M.
AU  - Sovilj, Milan N.
AU  - Kosvintsev, Serguei R.
AU  - Holdich, Richard G.
AU  - Vladisavljević, Goran T.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3518
AB  - Membrane emulsification of unrefined pumpkin seed oil was performed using microengineered flat disc membranes on top of which a paddle blade stirrer was operated to induce surface shear. The membranes used were fabricated by galvanic deposition of nickel onto a photolithographic template and contained hexagonal arrays of uniform cylindrical pores with a diameter of 19 or 40 mu m and a pore spacing of 140 mu m. The uniformly sized pumpkin seed oil drops with span values less than 0.4 were obtained at oil fluxes up to 640 L m(-2) h(-1) using 2 wt.% Tween 20 (polyoxyethylene sorbitan monolaurate) or 2-10 wt.% Pluronic F-68 (polyoxyethylene-polyoxypropylen copolymer) as an aqueous surfactant solution. Pumpkin seed oil is rich in surface active ingredients that can be adsorbed on the membrane surface, such as free fatty acids, phospholipids, and chlorophyll. The adsorption of these components on the membrane surface gradually led to membrane wetting by the oil phase and the formation of uniform drops was achieved only for dispersed phase contents less than 10 vol.% At high oil fluxes, Pluronic F-68 molecules present at a concentration of 2 wt.% could not adsorb fast enough, on the newly formed oil drops, to stabilise the expanding inter-face. (c) 2008 Elsevier B.V. All rights reserved.
T2  - Journal of Membrane Science
T1  - Controlled production of oil-in-water emulsions containing unrefined pumpkin seed oil using stirred cell membrane emulsification
VL  - 322
IS  - 1
SP  - 178
EP  - 188
DO  - 10.1016/j.memsci.2008.05.026
ER  - 

@article{
author = "Dragosavac, Marijana M. and Sovilj, Milan N. and Kosvintsev, Serguei R. and Holdich, Richard G. and Vladisavljević, Goran T.",
year = "2008",
abstract = "Membrane emulsification of unrefined pumpkin seed oil was performed using microengineered flat disc membranes on top of which a paddle blade stirrer was operated to induce surface shear. The membranes used were fabricated by galvanic deposition of nickel onto a photolithographic template and contained hexagonal arrays of uniform cylindrical pores with a diameter of 19 or 40 mu m and a pore spacing of 140 mu m. The uniformly sized pumpkin seed oil drops with span values less than 0.4 were obtained at oil fluxes up to 640 L m(-2) h(-1) using 2 wt.% Tween 20 (polyoxyethylene sorbitan monolaurate) or 2-10 wt.% Pluronic F-68 (polyoxyethylene-polyoxypropylen copolymer) as an aqueous surfactant solution. Pumpkin seed oil is rich in surface active ingredients that can be adsorbed on the membrane surface, such as free fatty acids, phospholipids, and chlorophyll. The adsorption of these components on the membrane surface gradually led to membrane wetting by the oil phase and the formation of uniform drops was achieved only for dispersed phase contents less than 10 vol.% At high oil fluxes, Pluronic F-68 molecules present at a concentration of 2 wt.% could not adsorb fast enough, on the newly formed oil drops, to stabilise the expanding inter-face. (c) 2008 Elsevier B.V. All rights reserved.",
journal = "Journal of Membrane Science",
title = "Controlled production of oil-in-water emulsions containing unrefined pumpkin seed oil using stirred cell membrane emulsification",
volume = "322",
number = "1",
pages = "178-188",
doi = "10.1016/j.memsci.2008.05.026"
}

Dragosavac, M. M., Sovilj, M. N., Kosvintsev, S. R., Holdich, R. G.,& Vladisavljević, G. T.. (2008). Controlled production of oil-in-water emulsions containing unrefined pumpkin seed oil using stirred cell membrane emulsification. in Journal of Membrane Science, 322(1), 178-188.
https://doi.org/10.1016/j.memsci.2008.05.026

Dragosavac MM, Sovilj MN, Kosvintsev SR, Holdich RG, Vladisavljević GT. Controlled production of oil-in-water emulsions containing unrefined pumpkin seed oil using stirred cell membrane emulsification. in Journal of Membrane Science. 2008;322(1):178-188.
doi:10.1016/j.memsci.2008.05.026 .

Dragosavac, Marijana M., Sovilj, Milan N., Kosvintsev, Serguei R., Holdich, Richard G., Vladisavljević, Goran T., "Controlled production of oil-in-water emulsions containing unrefined pumpkin seed oil using stirred cell membrane emulsification" in Journal of Membrane Science, 322, no. 1 (2008):178-188,
https://doi.org/10.1016/j.memsci.2008.05.026 . .

TY  - JOUR
AU  - Surh, Jeonghee
AU  - Jeong, Young Gyu
AU  - Vladisavljević, Goran T.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3500
AB  - We report on the preparation and characterization of lecithin-stabilized oil-in-water emulsions (10 or 20 wt% corn oil, 2 wt% lecithin, pH 3, 100 or 150 kPa) by multi-stage premix membrane emulsification using a Shirasu porous glass membrane (mean pore size 8 mu m). Structural characteristics of the emulsions such as droplet size distribution, mean droplet diameter, and morphology were measured by using a laser light scattering and optical microscopy, respectively. As the number of passes through the membrane increased from 1 to 5, the transmembrane flux decreased from 30 to 1 m(3) m(-2) h(-1). It demonstrates that lecithin emulsifier, even if its net charge is negative (pK(a) similar to pH 1.5), tends to foul SPG membrane by blocking the membrane pores, which was attributed to the possible interaction between positive groups on the lecithin molecules with anionic silanol groups on the membrane surface. (c) 2008 Elsevier Ltd. All rights reserved.
T2  - Journal of Food Engineering
T1  - On the preparation of lecithin-stabilized oil-in-water emulsions by multi-stage premix membrane emulsification
VL  - 89
IS  - 2
SP  - 164
EP  - 170
DO  - 10.1016/j.jfoodeng.2008.04.023
ER  - 

@article{
author = "Surh, Jeonghee and Jeong, Young Gyu and Vladisavljević, Goran T.",
year = "2008",
abstract = "We report on the preparation and characterization of lecithin-stabilized oil-in-water emulsions (10 or 20 wt% corn oil, 2 wt% lecithin, pH 3, 100 or 150 kPa) by multi-stage premix membrane emulsification using a Shirasu porous glass membrane (mean pore size 8 mu m). Structural characteristics of the emulsions such as droplet size distribution, mean droplet diameter, and morphology were measured by using a laser light scattering and optical microscopy, respectively. As the number of passes through the membrane increased from 1 to 5, the transmembrane flux decreased from 30 to 1 m(3) m(-2) h(-1). It demonstrates that lecithin emulsifier, even if its net charge is negative (pK(a) similar to pH 1.5), tends to foul SPG membrane by blocking the membrane pores, which was attributed to the possible interaction between positive groups on the lecithin molecules with anionic silanol groups on the membrane surface. (c) 2008 Elsevier Ltd. All rights reserved.",
journal = "Journal of Food Engineering",
title = "On the preparation of lecithin-stabilized oil-in-water emulsions by multi-stage premix membrane emulsification",
volume = "89",
number = "2",
pages = "164-170",
doi = "10.1016/j.jfoodeng.2008.04.023"
}

Surh, J., Jeong, Y. G.,& Vladisavljević, G. T.. (2008). On the preparation of lecithin-stabilized oil-in-water emulsions by multi-stage premix membrane emulsification. in Journal of Food Engineering, 89(2), 164-170.
https://doi.org/10.1016/j.jfoodeng.2008.04.023

Surh J, Jeong YG, Vladisavljević GT. On the preparation of lecithin-stabilized oil-in-water emulsions by multi-stage premix membrane emulsification. in Journal of Food Engineering. 2008;89(2):164-170.
doi:10.1016/j.jfoodeng.2008.04.023 .

Surh, Jeonghee, Jeong, Young Gyu, Vladisavljević, Goran T., "On the preparation of lecithin-stabilized oil-in-water emulsions by multi-stage premix membrane emulsification" in Journal of Food Engineering, 89, no. 2 (2008):164-170,
https://doi.org/10.1016/j.jfoodeng.2008.04.023 . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Vladisavljević, Goran T.
AU  - Tesic, M
AU  - Kumrić, Ksenija
AU  - Čomor, Jožef J.
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6338
AB  - The development of concentration boundary layer (CBL) inside the hollow fibers, based on the experimental data from membrane-based solvent extraction of thallium (III) from chloride-containing acidic solutions with butyl acetate, was investigated. The experiments have been performed using three laboratory made contactors, consisting of hydrophobic polypropylene or polyvinylidene fluoride fibers of different length. The feed solution flowed inside the fibers, while the organic phase was pumped counter-currently at the module shell side. The influence of aqueous flow rate on the mean mass transfer coefficient in the aqueous phase was investigated. The tube-side Sherwood number was proportional to the Graetz number raised to powers ranging between 0.4 and 0.81. A model for the determination of CBL thickness and entry length was developed and used for the numerical analysis of the process. The entry length, i.e. the axial distance from the fiber inlet at which CBL reaches the axis of the fibers, was directly proportional to the aqueous phase flow rate and inversely proportional to the number of fibers in a module.
T2  - Desalination
T1  - Analysis of concentration boundary layer in thallium (III) extraction with butyl acetate using membrane modules of different length
VL  - 148
IS  - 1-3
SP  - 241
EP  - 246
DO  - 10.1016/S0011-9164(02)00704-X
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Vladisavljević, Goran T. and Tesic, M and Kumrić, Ksenija and Čomor, Jožef J.",
year = "2002",
abstract = "The development of concentration boundary layer (CBL) inside the hollow fibers, based on the experimental data from membrane-based solvent extraction of thallium (III) from chloride-containing acidic solutions with butyl acetate, was investigated. The experiments have been performed using three laboratory made contactors, consisting of hydrophobic polypropylene or polyvinylidene fluoride fibers of different length. The feed solution flowed inside the fibers, while the organic phase was pumped counter-currently at the module shell side. The influence of aqueous flow rate on the mean mass transfer coefficient in the aqueous phase was investigated. The tube-side Sherwood number was proportional to the Graetz number raised to powers ranging between 0.4 and 0.81. A model for the determination of CBL thickness and entry length was developed and used for the numerical analysis of the process. The entry length, i.e. the axial distance from the fiber inlet at which CBL reaches the axis of the fibers, was directly proportional to the aqueous phase flow rate and inversely proportional to the number of fibers in a module.",
journal = "Desalination",
title = "Analysis of concentration boundary layer in thallium (III) extraction with butyl acetate using membrane modules of different length",
volume = "148",
number = "1-3",
pages = "241-246",
doi = "10.1016/S0011-9164(02)00704-X"
}

Trtić-Petrović, T. M., Vladisavljević, G. T., Tesic, M., Kumrić, K.,& Čomor, J. J.. (2002). Analysis of concentration boundary layer in thallium (III) extraction with butyl acetate using membrane modules of different length. in Desalination, 148(1-3), 241-246.
https://doi.org/10.1016/S0011-9164(02)00704-X

Trtić-Petrović TM, Vladisavljević GT, Tesic M, Kumrić K, Čomor JJ. Analysis of concentration boundary layer in thallium (III) extraction with butyl acetate using membrane modules of different length. in Desalination. 2002;148(1-3):241-246.
doi:10.1016/S0011-9164(02)00704-X .

Trtić-Petrović, Tatjana M., Vladisavljević, Goran T., Tesic, M, Kumrić, Ksenija, Čomor, Jožef J., "Analysis of concentration boundary layer in thallium (III) extraction with butyl acetate using membrane modules of different length" in Desalination, 148, no. 1-3 (2002):241-246,
https://doi.org/10.1016/S0011-9164(02)00704-X . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Vladisavljević, Goran T.
AU  - Archimandritis, Spyridon
AU  - Varvarigou, A
AU  - Čomor, Jožef J.
PY  - 2001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2456
AB  - The influence of module arrangements on solvent extraction of thallium(III) from NaCl/H2SO4 solution into butyl acetate has been studied using two laboratory-made modules consisting of hydrophobic polypropylene hollow fibers. The aqueous phase was recirculated between the module(s) and a mixed reservoir, and the organic phase was stagnant on the shell side. It was found that the extraction of Tl([Il) from aqueous phase strictly depends on aqueous flow rate and module arrangement. The results obtained are discussed in terms of the fraction of TI(III) removed from the aqueous phase reservoir, the flux of TI(III) through the interfacial area, and the best arrangement of modules for the production process of the radiopharmaceutical (TlCl)-Tl-201.
T2  - Journal of Separation Science
T1  - Influence of module arrangements on solvent extraction of thallium(III) in hollow fiber contactors
VL  - 24
IS  - 7
SP  - 519
EP  - 525
DO  - 10.1002/1615-9314(20010801)24:7 LT 519::AID-JSSC519 GT 3.0.CO;2-N
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Vladisavljević, Goran T. and Archimandritis, Spyridon and Varvarigou, A and Čomor, Jožef J.",
year = "2001",
abstract = "The influence of module arrangements on solvent extraction of thallium(III) from NaCl/H2SO4 solution into butyl acetate has been studied using two laboratory-made modules consisting of hydrophobic polypropylene hollow fibers. The aqueous phase was recirculated between the module(s) and a mixed reservoir, and the organic phase was stagnant on the shell side. It was found that the extraction of Tl([Il) from aqueous phase strictly depends on aqueous flow rate and module arrangement. The results obtained are discussed in terms of the fraction of TI(III) removed from the aqueous phase reservoir, the flux of TI(III) through the interfacial area, and the best arrangement of modules for the production process of the radiopharmaceutical (TlCl)-Tl-201.",
journal = "Journal of Separation Science",
title = "Influence of module arrangements on solvent extraction of thallium(III) in hollow fiber contactors",
volume = "24",
number = "7",
pages = "519-525",
doi = "10.1002/1615-9314(20010801)24:7 LT 519::AID-JSSC519 GT 3.0.CO;2-N"
}

Trtić-Petrović, T. M., Vladisavljević, G. T., Archimandritis, S., Varvarigou, A.,& Čomor, J. J.. (2001). Influence of module arrangements on solvent extraction of thallium(III) in hollow fiber contactors. in Journal of Separation Science, 24(7), 519-525.
https://doi.org/10.1002/1615-9314(20010801)24:7 LT 519::AID-JSSC519 GT 3.0.CO;2-N

Trtić-Petrović TM, Vladisavljević GT, Archimandritis S, Varvarigou A, Čomor JJ. Influence of module arrangements on solvent extraction of thallium(III) in hollow fiber contactors. in Journal of Separation Science. 2001;24(7):519-525.
doi:10.1002/1615-9314(20010801)24:7 LT 519::AID-JSSC519 GT 3.0.CO;2-N .

Trtić-Petrović, Tatjana M., Vladisavljević, Goran T., Archimandritis, Spyridon, Varvarigou, A, Čomor, Jožef J., "Influence of module arrangements on solvent extraction of thallium(III) in hollow fiber contactors" in Journal of Separation Science, 24, no. 7 (2001):519-525,
https://doi.org/10.1002/1615-9314(20010801)24:7 LT 519::AID-JSSC519 GT 3.0.CO;2-N . .