Tasić, V., Kovačević, R., Apostolovski-Trujić, T., Lazović, I., Mirkov, N., Topalović, D., Božilov, A.,& Mišić, N.. (2023). Uređaj za merenje kvaliteta vazduha - PAQMAN 2020. in Univerzitet u Beogradu : Institut za nuklearne nauke "Vinča" - Institut od nacionalnog značaja za Republiku Srbiju.
https://hdl.handle.net/21.15107/rcub_vinar_13000

Tasić V, Kovačević R, Apostolovski-Trujić T, Lazović I, Mirkov N, Topalović D, Božilov A, Mišić N. Uređaj za merenje kvaliteta vazduha - PAQMAN 2020. in Univerzitet u Beogradu : Institut za nuklearne nauke "Vinča" - Institut od nacionalnog značaja za Republiku Srbiju. 2023;.
https://hdl.handle.net/21.15107/rcub_vinar_13000 .

Tasić, Viša, Kovačević, Renata, Apostolovski-Trujić, Tatjana, Lazović, Ivan, Mirkov, Nikola, Topalović, Dušan, Božilov, Aca, Mišić, Nikola, "Uređaj za merenje kvaliteta vazduha - PAQMAN 2020" in Univerzitet u Beogradu : Institut za nuklearne nauke "Vinča" - Institut od nacionalnog značaja za Republiku Srbiju (2023),
https://hdl.handle.net/21.15107/rcub_vinar_13000 .

TY  - JOUR
AU  - Božilov, Aca
AU  - Tasić, Viša
AU  - Živković, Nenad
AU  - Lazović, Ivan
AU  - Blagojević, Milan
AU  - Mišić, Nikola
AU  - Topalović, Dušan
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10372
AB  - Over the last 10 years, as a possible alternative to the conventional approach to air quality monitoring, real-time monitoring systems that use low-cost sensors and sensor platforms have been frequently applied. Generally, the long-term characteristics of low-cost PM sensors and monitoring have not been thoroughly documented except for a few widely used sensors and monitors. This article addresses the laboratory and field validation of three low-cost PM monitors of the same type that use the NOVA SDS011 PM sensor module over a 1-year period. In outdoor environments, we co-located low-cost PM monitors with GRIMM EDM180 monitors at the National Air Quality Monitoring stations. In indoor environments, we co-located them with a Turnkey Osiris PM monitor. Several performance aspects of the PM monitors were examined: operational data coverage, linearity of response, accuracy, precision, and inter-sensor variability. The obtained results show that inter-monitor R values were typically higher than 0.95 regardless of the environment. The tested monitors demonstrate high linearity in comparison with PM10 and PM2.5 concentrations measured in outdoor air with reference-equivalent instrumentation with R2 values ranging from 0.52 up to 0.83. In addition, very good agreement (R2 values ranging from 0.93 up to 0.97) with the gravimetric PM10 and PM2.5 method is obtained in the indoor environment (30 < RH < 70%). High RH (over 70%) negatively affected the PM monitors’ response, especially in the case of PM10 concentrations (high overestimation).
T2  - Environmental Monitoring and Assessment
T1  - Performance assessment of NOVA SDS011 low-cost PM sensor in various microenvironments
VL  - 194
IS  - 9
SP  - 595
DO  - 10.1007/s10661-022-10290-7
ER  - 

@article{
author = "Božilov, Aca and Tasić, Viša and Živković, Nenad and Lazović, Ivan and Blagojević, Milan and Mišić, Nikola and Topalović, Dušan",
year = "2022",
abstract = "Over the last 10 years, as a possible alternative to the conventional approach to air quality monitoring, real-time monitoring systems that use low-cost sensors and sensor platforms have been frequently applied. Generally, the long-term characteristics of low-cost PM sensors and monitoring have not been thoroughly documented except for a few widely used sensors and monitors. This article addresses the laboratory and field validation of three low-cost PM monitors of the same type that use the NOVA SDS011 PM sensor module over a 1-year period. In outdoor environments, we co-located low-cost PM monitors with GRIMM EDM180 monitors at the National Air Quality Monitoring stations. In indoor environments, we co-located them with a Turnkey Osiris PM monitor. Several performance aspects of the PM monitors were examined: operational data coverage, linearity of response, accuracy, precision, and inter-sensor variability. The obtained results show that inter-monitor R values were typically higher than 0.95 regardless of the environment. The tested monitors demonstrate high linearity in comparison with PM10 and PM2.5 concentrations measured in outdoor air with reference-equivalent instrumentation with R2 values ranging from 0.52 up to 0.83. In addition, very good agreement (R2 values ranging from 0.93 up to 0.97) with the gravimetric PM10 and PM2.5 method is obtained in the indoor environment (30 < RH < 70%). High RH (over 70%) negatively affected the PM monitors’ response, especially in the case of PM10 concentrations (high overestimation).",
journal = "Environmental Monitoring and Assessment",
title = "Performance assessment of NOVA SDS011 low-cost PM sensor in various microenvironments",
volume = "194",
number = "9",
pages = "595",
doi = "10.1007/s10661-022-10290-7"
}

Božilov, A., Tasić, V., Živković, N., Lazović, I., Blagojević, M., Mišić, N.,& Topalović, D.. (2022). Performance assessment of NOVA SDS011 low-cost PM sensor in various microenvironments. in Environmental Monitoring and Assessment, 194(9), 595.
https://doi.org/10.1007/s10661-022-10290-7

Božilov A, Tasić V, Živković N, Lazović I, Blagojević M, Mišić N, Topalović D. Performance assessment of NOVA SDS011 low-cost PM sensor in various microenvironments. in Environmental Monitoring and Assessment. 2022;194(9):595.
doi:10.1007/s10661-022-10290-7 .

Božilov, Aca, Tasić, Viša, Živković, Nenad, Lazović, Ivan, Blagojević, Milan, Mišić, Nikola, Topalović, Dušan, "Performance assessment of NOVA SDS011 low-cost PM sensor in various microenvironments" in Environmental Monitoring and Assessment, 194, no. 9 (2022):595,
https://doi.org/10.1007/s10661-022-10290-7 . .

TY  - CONF
AU  - Topalović, Dušan
AU  - Radenković, Mirjana
AU  - Stanković-Petrović, Jelena S.
AU  - Tasić, Viša
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11111
AB  - Light Absorbing Carbon (LAC) or Black carbon (BC) is one of the most important components of fine particulate matter (PM2.5), which is formed through the incomplete combustion of fossil fuels, biofuels and biomass. Based on a number of studies, it has been shown that carbonaceous particles significantly affect air quality/environment and they are an important factor in the carbon cycle and climate change. BC, as one of the constituents of carbonaceous respirable particles, has the property of absorbing light and leads to an increase in the annual average air temperature. Therefore, its quantitative analysis and differentiation for determination of potential radiative effects is extremely important. The BC concentration is usually determined by using thermal or optical methods. In this paper, the results of the application of multiwavelength optical technique for BC estimation which is based on measuring the intensity of absorption/transmission of light through samples of deposited aerosols on PTFE filters, are presented. Sample collection was conducted at Belgrade suburban background site, in heating and nonheating seasons, using low-volume air samplers. In order to estimate the BC concentration of different particle diameters, measurements were performed by using the MABI ANSTO instrument, with LEDs that emit light at seven different wavelengths: 405 nm, 465 nm, 525 nm, 639 nm, 870 nm, 940 nm and 1050nm. The measurement procedure is started by determination of the value of light transmission I0 through an unexposed or blank filter at different wavelengths. After sampling, the estimation of light transmission I through the exposed filters was performed. Before estimation of BC concentration, the light-absorbing coefficient (babs) at each wavelength was determined separately. More intense variations in the values of babs were observed, which most likely occur due to the change in the nature of the pollution sources at the sampling site. The accuracy of the BC concentration depends on the value of the mass absorption coefficient (ε) estimated experimentally and whose values are compared with the predefined manufacturer values. BC generated by combustion at lower temperatures is better absorbed at shorter wavelengths. On the other hand, BC generated through high-temperature processes is better absorbed in the infrared region of the electromagnetic spectrum. Therefore, the differences of BC concentrations at two boundary wavelengths: 405 nm and 1050 nm were analyzed. Finally, seasonal BC variations were observed, with increased values in the winter and autumn periods compared to the summer period.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
T1  - Assessment and differentiation of light absorbing carbon in atmospheric aerosols
SP  - 51
DO  - 10.21175/rad.spr.abstr.book.2022.13.6
ER  - 

@conference{
author = "Topalović, Dušan and Radenković, Mirjana and Stanković-Petrović, Jelena S. and Tasić, Viša",
year = "2022",
abstract = "Light Absorbing Carbon (LAC) or Black carbon (BC) is one of the most important components of fine particulate matter (PM2.5), which is formed through the incomplete combustion of fossil fuels, biofuels and biomass. Based on a number of studies, it has been shown that carbonaceous particles significantly affect air quality/environment and they are an important factor in the carbon cycle and climate change. BC, as one of the constituents of carbonaceous respirable particles, has the property of absorbing light and leads to an increase in the annual average air temperature. Therefore, its quantitative analysis and differentiation for determination of potential radiative effects is extremely important. The BC concentration is usually determined by using thermal or optical methods. In this paper, the results of the application of multiwavelength optical technique for BC estimation which is based on measuring the intensity of absorption/transmission of light through samples of deposited aerosols on PTFE filters, are presented. Sample collection was conducted at Belgrade suburban background site, in heating and nonheating seasons, using low-volume air samplers. In order to estimate the BC concentration of different particle diameters, measurements were performed by using the MABI ANSTO instrument, with LEDs that emit light at seven different wavelengths: 405 nm, 465 nm, 525 nm, 639 nm, 870 nm, 940 nm and 1050nm. The measurement procedure is started by determination of the value of light transmission I0 through an unexposed or blank filter at different wavelengths. After sampling, the estimation of light transmission I through the exposed filters was performed. Before estimation of BC concentration, the light-absorbing coefficient (babs) at each wavelength was determined separately. More intense variations in the values of babs were observed, which most likely occur due to the change in the nature of the pollution sources at the sampling site. The accuracy of the BC concentration depends on the value of the mass absorption coefficient (ε) estimated experimentally and whose values are compared with the predefined manufacturer values. BC generated by combustion at lower temperatures is better absorbed at shorter wavelengths. On the other hand, BC generated through high-temperature processes is better absorbed in the infrared region of the electromagnetic spectrum. Therefore, the differences of BC concentrations at two boundary wavelengths: 405 nm and 1050 nm were analyzed. Finally, seasonal BC variations were observed, with increased values in the winter and autumn periods compared to the summer period.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro",
title = "Assessment and differentiation of light absorbing carbon in atmospheric aerosols",
pages = "51",
doi = "10.21175/rad.spr.abstr.book.2022.13.6"
}

Topalović, D., Radenković, M., Stanković-Petrović, J. S.,& Tasić, V.. (2022). Assessment and differentiation of light absorbing carbon in atmospheric aerosols. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 51.
https://doi.org/10.21175/rad.spr.abstr.book.2022.13.6

Topalović D, Radenković M, Stanković-Petrović JS, Tasić V. Assessment and differentiation of light absorbing carbon in atmospheric aerosols. in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro. 2022;:51.
doi:10.21175/rad.spr.abstr.book.2022.13.6 .

Topalović, Dušan, Radenković, Mirjana, Stanković-Petrović, Jelena S., Tasić, Viša, "Assessment and differentiation of light absorbing carbon in atmospheric aerosols" in RAD 2022 : 10th Jubilee International Conference on Radiation in Various Fields of Research : book of abstracts; June 13-17; Herceg Novi, Montenegro (2022):51,
https://doi.org/10.21175/rad.spr.abstr.book.2022.13.6 . .

TY  - CONF
AU  - Radenković, Mirjana
AU  - Topalović, Dušan
AU  - Trtić-Petrović, Tatjana M.
AU  - Tasić, Viša
AU  - Stanković, Srboljub
AU  - Stanić, Vojislav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11123
AB  - Besides the evident harmful impact to human health, black carbon (BC) is considered as second important contributor to climate change due to its sunlight absorption and warming effects. It is a major component of fine atmospheric particulate matter emitted during the incomplete combustion of fossil fuels and biomass burning emissions from both natural and anthropogenic sources. Atmospheric carbon was recognized in forms of soot, black carbon, elemental carbon, inorganic carbon, organic carbon, brown carbon, etc, depending on the origin and absorption characteristics. Measurement methodologies for BC analysis in aerosol samples are mostly based on optical and thermal properties of carbon species. Here are presented results of the application of the optical analytical technique which relies on the multi-wavelenght light attenuation by black carbon component of fine particulate matter deposited on filter media. For that purpose, standard polytetrafluoroethylene (PTFE), quartz and carbon nanotube filters with different qualitative features and pore diameters were exposed to fine aerosol fraction at urban background monitoring site in heating and non heating seasons, using low-volume air samplers with 2.3 m3/h air flow. A multi wavelength absorption black carbon instrument (MABI) with 405 nm, 465 nm, 525 nm, 639 nm, 870 nm, 940 nm and 1050 nm LEDs was used for blank and exposed filters analysis and black carbon evaluation. Differences in obtained BC values are discussed in relation to various absorption potential of different filter media, taking into account absorption coefficients dependence on the wavelength and density. Main advantage of this method is simplicity and complementarity with nondestructive nuclear analytical techniques (EDXRF, PIXE) for elemental analysis of fine aerosol fraction on specific filter media. Differentiation between black carbon coming from fossil fuels combustion and from biomass burning sources would be additional information valuable for source apportionment analysis using positive matrix factorization and reliable discussion of air pollution observed at selected receptor site.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - Evaluation of black carbon in fine atmospheric particulate matter on various filter types by multi-wavelength light absorption technique
SP  - 64
DO  - 10.21175/rad.abstr.book.2021.11.6
ER  - 

@conference{
author = "Radenković, Mirjana and Topalović, Dušan and Trtić-Petrović, Tatjana M. and Tasić, Viša and Stanković, Srboljub and Stanić, Vojislav",
year = "2021",
abstract = "Besides the evident harmful impact to human health, black carbon (BC) is considered as second important contributor to climate change due to its sunlight absorption and warming effects. It is a major component of fine atmospheric particulate matter emitted during the incomplete combustion of fossil fuels and biomass burning emissions from both natural and anthropogenic sources. Atmospheric carbon was recognized in forms of soot, black carbon, elemental carbon, inorganic carbon, organic carbon, brown carbon, etc, depending on the origin and absorption characteristics. Measurement methodologies for BC analysis in aerosol samples are mostly based on optical and thermal properties of carbon species. Here are presented results of the application of the optical analytical technique which relies on the multi-wavelenght light attenuation by black carbon component of fine particulate matter deposited on filter media. For that purpose, standard polytetrafluoroethylene (PTFE), quartz and carbon nanotube filters with different qualitative features and pore diameters were exposed to fine aerosol fraction at urban background monitoring site in heating and non heating seasons, using low-volume air samplers with 2.3 m3/h air flow. A multi wavelength absorption black carbon instrument (MABI) with 405 nm, 465 nm, 525 nm, 639 nm, 870 nm, 940 nm and 1050 nm LEDs was used for blank and exposed filters analysis and black carbon evaluation. Differences in obtained BC values are discussed in relation to various absorption potential of different filter media, taking into account absorption coefficients dependence on the wavelength and density. Main advantage of this method is simplicity and complementarity with nondestructive nuclear analytical techniques (EDXRF, PIXE) for elemental analysis of fine aerosol fraction on specific filter media. Differentiation between black carbon coming from fossil fuels combustion and from biomass burning sources would be additional information valuable for source apportionment analysis using positive matrix factorization and reliable discussion of air pollution observed at selected receptor site.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "Evaluation of black carbon in fine atmospheric particulate matter on various filter types by multi-wavelength light absorption technique",
pages = "64",
doi = "10.21175/rad.abstr.book.2021.11.6"
}

Radenković, M., Topalović, D., Trtić-Petrović, T. M., Tasić, V., Stanković, S.,& Stanić, V.. (2021). Evaluation of black carbon in fine atmospheric particulate matter on various filter types by multi-wavelength light absorption technique. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 64.
https://doi.org/10.21175/rad.abstr.book.2021.11.6

Radenković M, Topalović D, Trtić-Petrović TM, Tasić V, Stanković S, Stanić V. Evaluation of black carbon in fine atmospheric particulate matter on various filter types by multi-wavelength light absorption technique. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:64.
doi:10.21175/rad.abstr.book.2021.11.6 .

Radenković, Mirjana, Topalović, Dušan, Trtić-Petrović, Tatjana M., Tasić, Viša, Stanković, Srboljub, Stanić, Vojislav, "Evaluation of black carbon in fine atmospheric particulate matter on various filter types by multi-wavelength light absorption technique" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):64,
https://doi.org/10.21175/rad.abstr.book.2021.11.6 . .

TY  - CONF
AU  - Topalović, Dušan
AU  - Radenković, Mirjana
AU  - Tasić, Viša
AU  - Stanić, Vojislav
AU  - Božović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11124
AB  - Positive matrix factorization (PMF) is a dimension reduction method used to model the covariance structures of observable variables in order to impel a smaller number of latent nonnegative factors. It resolves receptor modeling problem, which is based on the chemical mass balance equation (CMB) and may discover hidden patterns in the environmental data, where each extracted factor is accompanied by an actual source of emission. In this paper, PMF source apportionment analyses of fine aerosol fraction (PM2.5 mode) at Belgrade suburban background site, in 2016/17 year, have been performed by processing a data set of 130 PM2.5 mass concentrations and twenty-one elemental concentrations and soot concentrations in each PM2.5 sample (mode). The PM2.5 mass concentrations in collected samples have been determined following SRPS EN 12341:201 procedure, elemental concentrations were obtained by PIXE alanytical technique in the frame of the regional IAEA project, in the Institute of Nuclear Research, Hungarian Academy of Sciences, and soot concentrations were analyzed by smoke stain reflectometry in accordance with ISO 9835:1993 (E). The EPA PMF program ver 5.0, was used to solve the PMF model. Since the determination of an optimal PMF solution is a strongly heuristic procedure, there is a necessity of finding a more quantitative ways to reduce the arbitrariness of this technique. In order to reduce the range of possible solutions, we have analyzed how the values of model parameters changes as a function of the number of factors. PMF modeling was performed in a robust mode. For the purpose of finding the best fit solution wich minimize the object function Q, we varied the number of factors in the range from 4 to 8. Additionally, influence of rotations are also analyzed in iterative steps by varying FPEAK function in the range -1 to +1 with an increment of 0.5. Obtained results indicated significant role of Q/Qexp ratio analysis for optimal solution choice. In optimization process, number of factors with Q/Qexp ratio less than 1, were rejected as a possible solutions. This paper shows that optimization procedure should include examination of rotational matrix in which the rotational degree of freedom of solution is considered. Solutions with a steep change in their rotational degree of freedom were rejected. Finally, the additional improvement can be done by optimizing the parameters representing the scaled mean value (IM) and the scaled standard deviation (IS) of the each individual column in scaled residual matrix.
PB  - RAD Centre, Niš, Serbia
C3  - RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
T1  - Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software
SP  - 68
DO  - 10.21175/rad.abstr.book.2021.12.3
ER  - 

@conference{
author = "Topalović, Dušan and Radenković, Mirjana and Tasić, Viša and Stanić, Vojislav and Božović, Predrag",
year = "2021",
abstract = "Positive matrix factorization (PMF) is a dimension reduction method used to model the covariance structures of observable variables in order to impel a smaller number of latent nonnegative factors. It resolves receptor modeling problem, which is based on the chemical mass balance equation (CMB) and may discover hidden patterns in the environmental data, where each extracted factor is accompanied by an actual source of emission. In this paper, PMF source apportionment analyses of fine aerosol fraction (PM2.5 mode) at Belgrade suburban background site, in 2016/17 year, have been performed by processing a data set of 130 PM2.5 mass concentrations and twenty-one elemental concentrations and soot concentrations in each PM2.5 sample (mode). The PM2.5 mass concentrations in collected samples have been determined following SRPS EN 12341:201 procedure, elemental concentrations were obtained by PIXE alanytical technique in the frame of the regional IAEA project, in the Institute of Nuclear Research, Hungarian Academy of Sciences, and soot concentrations were analyzed by smoke stain reflectometry in accordance with ISO 9835:1993 (E). The EPA PMF program ver 5.0, was used to solve the PMF model. Since the determination of an optimal PMF solution is a strongly heuristic procedure, there is a necessity of finding a more quantitative ways to reduce the arbitrariness of this technique. In order to reduce the range of possible solutions, we have analyzed how the values of model parameters changes as a function of the number of factors. PMF modeling was performed in a robust mode. For the purpose of finding the best fit solution wich minimize the object function Q, we varied the number of factors in the range from 4 to 8. Additionally, influence of rotations are also analyzed in iterative steps by varying FPEAK function in the range -1 to +1 with an increment of 0.5. Obtained results indicated significant role of Q/Qexp ratio analysis for optimal solution choice. In optimization process, number of factors with Q/Qexp ratio less than 1, were rejected as a possible solutions. This paper shows that optimization procedure should include examination of rotational matrix in which the rotational degree of freedom of solution is considered. Solutions with a steep change in their rotational degree of freedom were rejected. Finally, the additional improvement can be done by optimizing the parameters representing the scaled mean value (IM) and the scaled standard deviation (IS) of the each individual column in scaled residual matrix.",
publisher = "RAD Centre, Niš, Serbia",
journal = "RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro",
title = "Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software",
pages = "68",
doi = "10.21175/rad.abstr.book.2021.12.3"
}

Topalović, D., Radenković, M., Tasić, V., Stanić, V.,& Božović, P.. (2021). Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro
RAD Centre, Niš, Serbia., 68.
https://doi.org/10.21175/rad.abstr.book.2021.12.3

Topalović D, Radenković M, Tasić V, Stanić V, Božović P. Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software. in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro. 2021;:68.
doi:10.21175/rad.abstr.book.2021.12.3 .

Topalović, Dušan, Radenković, Mirjana, Tasić, Viša, Stanić, Vojislav, Božović, Predrag, "Optimization of the source apportionment solution using the rotational tools in US EPA PMF 5.0 software" in RAD 2021 : 9th International Conference on Radiation in Various Fields of Research : book of abstracts; June 14-18; Herceg Novi, Montenegro (2021):68,
https://doi.org/10.21175/rad.abstr.book.2021.12.3 . .

TY  - JOUR
AU  - Jovanović, Maja
AU  - Savić, Jasmina
AU  - Kovačević, Renata
AU  - Tasić, Viša
AU  - Todorović, Žaklina
AU  - Stevanović, Svetlana
AU  - Manojlović, Dragan D.
AU  - Jovašević-Stojanović, Milena
PY  - 2020
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/3820
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8750
AB  - Urban airborne particles contain a wide spectrum of components, known to have harmful effects on human health. This study reports a detailed investigation of fine particulate matter (PM2.5), chemical content and oxidative potential derived from two different urban environments. During summer and winter, 20-day campaigns were conducted at Belgrade city center (urban-background site – UB) and Bor (urban-industrial site – UI). Using various analytical techniques, carbonaceous compounds, water-soluble inorganic ions, major and trace elements were determined, while the oxidative potential of PM2.5 was estimated by dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay (OPDCFH values). The mean PM2.5 concentrations in both urban environments were above the recommended daily value, and the dominant PM2.5 mass contributor was organic matter (29–55%). The OC/EC ratio was significantly higher at UB site during winter, which was an indication of a considerable contribution of secondary organic carbon to the overall organic carbon (OC). Water-soluble organic carbon (WSOC) was also higher at UB than at UI site, and it probably came from the same sources as OC. In general, the different partition of secondary organic aerosol (SOA) in warm and cold periods affected the number of organic components. Sulfates and nitrates were the most abundant ions at both sites and they counted approximately 40% (summer) and 50% (winter) of total ions. Further, the concentrations of the most elements, particularly some potentially carcinogenic elements such as As, Cd and Pb were significantly higher at UI, due to the emissions from the copper smelter complex in the vicinity. The mean OPDCFH values were similar during the summer at both sampling sites, whereas a statistically significant difference between sites was noticed in favor of UB environment in winter.
T2  - Science of the Total Environment
T1  - Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments
VL  - 708
SP  - 135209
DO  - 10.1016/j.scitotenv.2019.135209
ER  - 

@article{
author = "Jovanović, Maja and Savić, Jasmina and Kovačević, Renata and Tasić, Viša and Todorović, Žaklina and Stevanović, Svetlana and Manojlović, Dragan D. and Jovašević-Stojanović, Milena",
year = "2020",
abstract = "Urban airborne particles contain a wide spectrum of components, known to have harmful effects on human health. This study reports a detailed investigation of fine particulate matter (PM2.5), chemical content and oxidative potential derived from two different urban environments. During summer and winter, 20-day campaigns were conducted at Belgrade city center (urban-background site – UB) and Bor (urban-industrial site – UI). Using various analytical techniques, carbonaceous compounds, water-soluble inorganic ions, major and trace elements were determined, while the oxidative potential of PM2.5 was estimated by dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay (OPDCFH values). The mean PM2.5 concentrations in both urban environments were above the recommended daily value, and the dominant PM2.5 mass contributor was organic matter (29–55%). The OC/EC ratio was significantly higher at UB site during winter, which was an indication of a considerable contribution of secondary organic carbon to the overall organic carbon (OC). Water-soluble organic carbon (WSOC) was also higher at UB than at UI site, and it probably came from the same sources as OC. In general, the different partition of secondary organic aerosol (SOA) in warm and cold periods affected the number of organic components. Sulfates and nitrates were the most abundant ions at both sites and they counted approximately 40% (summer) and 50% (winter) of total ions. Further, the concentrations of the most elements, particularly some potentially carcinogenic elements such as As, Cd and Pb were significantly higher at UI, due to the emissions from the copper smelter complex in the vicinity. The mean OPDCFH values were similar during the summer at both sampling sites, whereas a statistically significant difference between sites was noticed in favor of UB environment in winter.",
journal = "Science of the Total Environment",
title = "Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments",
volume = "708",
pages = "135209",
doi = "10.1016/j.scitotenv.2019.135209"
}

Jovanović, M., Savić, J., Kovačević, R., Tasić, V., Todorović, Ž., Stevanović, S., Manojlović, D. D.,& Jovašević-Stojanović, M.. (2020). Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments. in Science of the Total Environment, 708, 135209.
https://doi.org/10.1016/j.scitotenv.2019.135209

Jovanović M, Savić J, Kovačević R, Tasić V, Todorović Ž, Stevanović S, Manojlović DD, Jovašević-Stojanović M. Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments. in Science of the Total Environment. 2020;708:135209.
doi:10.1016/j.scitotenv.2019.135209 .

Jovanović, Maja, Savić, Jasmina, Kovačević, Renata, Tasić, Viša, Todorović, Žaklina, Stevanović, Svetlana, Manojlović, Dragan D., Jovašević-Stojanović, Milena, "Comparison of fine particulate matter level, chemical content and oxidative potential derived from two dissimilar urban environments" in Science of the Total Environment, 708 (2020):135209,
https://doi.org/10.1016/j.scitotenv.2019.135209 . .

TY  - CONF
AU  - Davidović, Miloš
AU  - Topalović, Dušan
AU  - Tasić, Viša
AU  - Jovašević-Stojanović, Milena
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12690
AB  - One of the most important factors for increasing usefulness and relevance of air pollution data on a personal level would certainly be an increase in its spatial resolution. Current state of affairs in air quality monitoring networks at state or local level is such that they typically provide a wealth of high resolution temporal data, but monitoring stations are on the other hand mainly located at a few strategically important places in urban area. This low spatial resolution is a big barrier towards providing personally relevant information to citizens which would then be able to answer questions such as: what is the level of air pollution on routes and places they frequent, what are the associated health risks, and finally what can they do about it and at what cost? Part of the solution to this complex puzzle may be in low-cost air quality sensors (LCS). LCS’s are an emerging technology and are now commercially available for gases, particulate matter and meteorological parameters in a wide variety of designs and capabilities. However, the data sets generated by devices composed of selected LCS are often of questionable data quality. There are some protocols for calibration LCS in laboratory and in the field, but such procedures are extensive and appropriate for testing performance only during sensor development, but are certainly not practically feasible for testing of each commercial LCS [1, 2]. Developing, optimizing, and refining experiments and statistical modelling techniques for LCS-AQ calibration and validation is the mandatory step on the route of obtaining reliable and meaningful data [3, 4]. This work elaborates an important part of LCS deployment – its effective calibration procedure. We will describe our current work on calibration procedures for sensors for gaseous pollutants: ozone and carbon monoxide and sensors for particulate matter. In validation campaigns described in this work we have used combination of quality checks and mid-level validation, together with several statistical modeling approaches in order to observe which sensors have desirable level of performance and to later derive calibration curves or more complex calibration models. Calibration models were based on simple linear regression (LR), multiple linear regression (MLR) and artificial neural networks (ANN). Mid-level validation of particulate matter low cost sensors was done via collocation with lab-grade instruments in laboratory office space in Institute Vinca and the results were collected for several weeks. Low cost instruments included two Sharp GP2Y1010AU0F compact optical dust sensors connected to Arduino platform (1 channel output), Alphasense CompactOPC sensor (16 channels from 0.38 to 17 μm) and Dylos DC1700 PM unit (2 channels corresponding to “large” and “small” particles). Lab grade instruments included TSI NanoScan SMPS Model 3910 and TSI Optical particle sizer 3330 (17 channels from 0.3um to 10um). Basic quality check of two Sharp sensors showed that they did not have malfunctions and are surprisingly reliable when used in combination with Arduino platform. Sharp sensors mutually correlate with correlation coefficient cc~0.98. In comparison with lab grade instruments, they correlate best with OPS first channel cc~0.75 and cc steadily declines for channels corresponding to larger particles. Dylos channels best correlate with OPS 0.5-0.721μm for “small” particles with cc~0.60, and with OPS 2.156 μm for “large” particles with cc~0.978. Best performing low cost sensor was certainly Alphasense OPC with cc over 0.90 for corresponding channels. Performed validation steps clearly show to which particulate matter size range individual sensor channels correspond, enabling one to derive meaningful calibration curves. LCS’s for gaseous pollutants were deployed within multi-sensor platform AQMesh. Platforms were collocated with Automatic Monitoring Station Stari Grad belonging to the State Network run by the Serbian Environmental Protection Agency (SEPA), in two 1-month periods in late summer and early autumn 2015. CO and O3 sensors in AQMesh platform passed low level validation (criteria was percentage of collected data), and were considered for development of calibration models. Choice of predictors for MLR and ANN models utilized both statistical reasoning and heuristics to avoid overfitting calibrated sensor with co-varying gas species. Improvements in sensor performance with sophisticated ANN models compared to LR were significant, resulting in relative residuals less than 15% for concentration of pollutant approximately ranging from 175 μg/m3  to 400 μg/m3 , while for O3 in the range from 40 μg/m3 to 120 μg/m3 .
PB  - Belgrade : Serbian Chemical Society
C3  - ENVIROCHEM 2018 : 8th Symposium Chemistry and Environmental Protection : program and the book of abstracts
T1  - Towards widespread adoption of low cost air quality sensors - a necessity for effective calibration procedures
SP  - 39
EP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12690
ER  - 

@conference{
author = "Davidović, Miloš and Topalović, Dušan and Tasić, Viša and Jovašević-Stojanović, Milena",
year = "2018",
abstract = "One of the most important factors for increasing usefulness and relevance of air pollution data on a personal level would certainly be an increase in its spatial resolution. Current state of affairs in air quality monitoring networks at state or local level is such that they typically provide a wealth of high resolution temporal data, but monitoring stations are on the other hand mainly located at a few strategically important places in urban area. This low spatial resolution is a big barrier towards providing personally relevant information to citizens which would then be able to answer questions such as: what is the level of air pollution on routes and places they frequent, what are the associated health risks, and finally what can they do about it and at what cost? Part of the solution to this complex puzzle may be in low-cost air quality sensors (LCS). LCS’s are an emerging technology and are now commercially available for gases, particulate matter and meteorological parameters in a wide variety of designs and capabilities. However, the data sets generated by devices composed of selected LCS are often of questionable data quality. There are some protocols for calibration LCS in laboratory and in the field, but such procedures are extensive and appropriate for testing performance only during sensor development, but are certainly not practically feasible for testing of each commercial LCS [1, 2]. Developing, optimizing, and refining experiments and statistical modelling techniques for LCS-AQ calibration and validation is the mandatory step on the route of obtaining reliable and meaningful data [3, 4]. This work elaborates an important part of LCS deployment – its effective calibration procedure. We will describe our current work on calibration procedures for sensors for gaseous pollutants: ozone and carbon monoxide and sensors for particulate matter. In validation campaigns described in this work we have used combination of quality checks and mid-level validation, together with several statistical modeling approaches in order to observe which sensors have desirable level of performance and to later derive calibration curves or more complex calibration models. Calibration models were based on simple linear regression (LR), multiple linear regression (MLR) and artificial neural networks (ANN). Mid-level validation of particulate matter low cost sensors was done via collocation with lab-grade instruments in laboratory office space in Institute Vinca and the results were collected for several weeks. Low cost instruments included two Sharp GP2Y1010AU0F compact optical dust sensors connected to Arduino platform (1 channel output), Alphasense CompactOPC sensor (16 channels from 0.38 to 17 μm) and Dylos DC1700 PM unit (2 channels corresponding to “large” and “small” particles). Lab grade instruments included TSI NanoScan SMPS Model 3910 and TSI Optical particle sizer 3330 (17 channels from 0.3um to 10um). Basic quality check of two Sharp sensors showed that they did not have malfunctions and are surprisingly reliable when used in combination with Arduino platform. Sharp sensors mutually correlate with correlation coefficient cc~0.98. In comparison with lab grade instruments, they correlate best with OPS first channel cc~0.75 and cc steadily declines for channels corresponding to larger particles. Dylos channels best correlate with OPS 0.5-0.721μm for “small” particles with cc~0.60, and with OPS 2.156 μm for “large” particles with cc~0.978. Best performing low cost sensor was certainly Alphasense OPC with cc over 0.90 for corresponding channels. Performed validation steps clearly show to which particulate matter size range individual sensor channels correspond, enabling one to derive meaningful calibration curves. LCS’s for gaseous pollutants were deployed within multi-sensor platform AQMesh. Platforms were collocated with Automatic Monitoring Station Stari Grad belonging to the State Network run by the Serbian Environmental Protection Agency (SEPA), in two 1-month periods in late summer and early autumn 2015. CO and O3 sensors in AQMesh platform passed low level validation (criteria was percentage of collected data), and were considered for development of calibration models. Choice of predictors for MLR and ANN models utilized both statistical reasoning and heuristics to avoid overfitting calibrated sensor with co-varying gas species. Improvements in sensor performance with sophisticated ANN models compared to LR were significant, resulting in relative residuals less than 15% for concentration of pollutant approximately ranging from 175 μg/m3  to 400 μg/m3 , while for O3 in the range from 40 μg/m3 to 120 μg/m3 .",
publisher = "Belgrade : Serbian Chemical Society",
journal = "ENVIROCHEM 2018 : 8th Symposium Chemistry and Environmental Protection : program and the book of abstracts",
title = "Towards widespread adoption of low cost air quality sensors - a necessity for effective calibration procedures",
pages = "39-40",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12690"
}

Davidović, M., Topalović, D., Tasić, V.,& Jovašević-Stojanović, M.. (2018). Towards widespread adoption of low cost air quality sensors - a necessity for effective calibration procedures. in ENVIROCHEM 2018 : 8th Symposium Chemistry and Environmental Protection : program and the book of abstracts
Belgrade : Serbian Chemical Society., 39-40.
https://hdl.handle.net/21.15107/rcub_vinar_12690

Davidović M, Topalović D, Tasić V, Jovašević-Stojanović M. Towards widespread adoption of low cost air quality sensors - a necessity for effective calibration procedures. in ENVIROCHEM 2018 : 8th Symposium Chemistry and Environmental Protection : program and the book of abstracts. 2018;:39-40.
https://hdl.handle.net/21.15107/rcub_vinar_12690 .

Davidović, Miloš, Topalović, Dušan, Tasić, Viša, Jovašević-Stojanović, Milena, "Towards widespread adoption of low cost air quality sensors - a necessity for effective calibration procedures" in ENVIROCHEM 2018 : 8th Symposium Chemistry and Environmental Protection : program and the book of abstracts (2018):39-40,
https://hdl.handle.net/21.15107/rcub_vinar_12690 .

TY  - CONF
AU  - Vašalić, Dragan
AU  - Lazović, Ivan
AU  - Petronić, Sanja
AU  - Masoničić, Zoran
AU  - Tasić, Viša
PY  - 2018
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10492
AB  - Road transport is the significant and inevitable part of the modern society. Its accelerated expansion is recognized as one of the causes for the increased air pollutant emissions (CO, NOx, NMVOC, PM2.5, and CO2). Therefore, the priorities of the future development of heavy-duty vehicles and their equipment are the reduction of the fuel consumption and reduction of the exhaust gases emissions. In this paper, the monitored emissions of heavy-duty vehicles of various technologies, that use diesel as fuel, have been analyzed by using the COPERT program. The analysis shows that Euro 5 vehicles emit 29% less harmful substances compared with Euro 3 vehicles.
C3  - IOC 2018 : 50th International October Conference on Mining and Metallurgy : Proceedings; September 30th - October 3rd, 2018; Bor
T1  - Ecological and economic aspects of diesel fuel use in the road transport by heavy-duty vehicles in Serbia
SP  - 393
EP  - 399
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10492
ER  - 

@conference{
author = "Vašalić, Dragan and Lazović, Ivan and Petronić, Sanja and Masoničić, Zoran and Tasić, Viša",
year = "2018, 2018",
abstract = "Road transport is the significant and inevitable part of the modern society. Its accelerated expansion is recognized as one of the causes for the increased air pollutant emissions (CO, NOx, NMVOC, PM2.5, and CO2). Therefore, the priorities of the future development of heavy-duty vehicles and their equipment are the reduction of the fuel consumption and reduction of the exhaust gases emissions. In this paper, the monitored emissions of heavy-duty vehicles of various technologies, that use diesel as fuel, have been analyzed by using the COPERT program. The analysis shows that Euro 5 vehicles emit 29% less harmful substances compared with Euro 3 vehicles.",
journal = "IOC 2018 : 50th International October Conference on Mining and Metallurgy : Proceedings; September 30th - October 3rd, 2018; Bor",
title = "Ecological and economic aspects of diesel fuel use in the road transport by heavy-duty vehicles in Serbia",
pages = "393-399",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10492"
}

Vašalić, D., Lazović, I., Petronić, S., Masoničić, Z.,& Tasić, V.. (2018). Ecological and economic aspects of diesel fuel use in the road transport by heavy-duty vehicles in Serbia. in IOC 2018 : 50th International October Conference on Mining and Metallurgy : Proceedings; September 30th - October 3rd, 2018; Bor, 393-399.
https://hdl.handle.net/21.15107/rcub_vinar_10492

Vašalić D, Lazović I, Petronić S, Masoničić Z, Tasić V. Ecological and economic aspects of diesel fuel use in the road transport by heavy-duty vehicles in Serbia. in IOC 2018 : 50th International October Conference on Mining and Metallurgy : Proceedings; September 30th - October 3rd, 2018; Bor. 2018;:393-399.
https://hdl.handle.net/21.15107/rcub_vinar_10492 .

Vašalić, Dragan, Lazović, Ivan, Petronić, Sanja, Masoničić, Zoran, Tasić, Viša, "Ecological and economic aspects of diesel fuel use in the road transport by heavy-duty vehicles in Serbia" in IOC 2018 : 50th International October Conference on Mining and Metallurgy : Proceedings; September 30th - October 3rd, 2018; Bor (2018):393-399,
https://hdl.handle.net/21.15107/rcub_vinar_10492 .

TY  - JOUR
AU  - Cocić, Mira
AU  - Logar, Mihovil
AU  - Erić, Suzana
AU  - Tasić, Viša
AU  - Dević, Snežana
AU  - Cocić, Saša
AU  - Matović, Branko
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10336
AB  - This work describes the investigation of the final flotation waste (FFW), originating from the RTB Bor Company (Serbia), as the main component for the production of glass-ceramic materials. The glass-ceramics was synthesized by the sintering of FFW, mixtures of FFW with basalt (10%, 20%, and 40%), and mixtures of FFW with tuff (20% and 40%). The sintering was conducted at the different temperatures and with the different time duration in order to find the optimal composition and conditions for crystallization. The increase of temperature, from 1100 to 1480°C, and sintering time, from 4 to 6h resulted in a higher content of hematite crystal in the obtained glass-ceramic (up to 44%). The glass-ceramics sintered from pure FFW (1080°C/36h) has good mechanical properties, such as high propagation speed (4500 m/s) and hardness (10800 MPa), as well as very good thermal stability. The glass-ceramics obtained from mixtures shows weaker mechanical properties compared to that obtained from pure FFW. The mixtures of FFW with tuff have a significantly lower bulk density compared to other obtained glass-ceramics. Our results indicate that FFW can be applied as a basis for obtaining the construction materials.
T2  - Science of Sintering
T1  - Application of the final flotation waste for obtaining the glass-ceramic materials
VL  - 49
IS  - 4
SP  - 431
EP  - 443
DO  - 10.2298/SOS1704431C
ER  - 

@article{
author = "Cocić, Mira and Logar, Mihovil and Erić, Suzana and Tasić, Viša and Dević, Snežana and Cocić, Saša and Matović, Branko",
year = "2017",
abstract = "This work describes the investigation of the final flotation waste (FFW), originating from the RTB Bor Company (Serbia), as the main component for the production of glass-ceramic materials. The glass-ceramics was synthesized by the sintering of FFW, mixtures of FFW with basalt (10%, 20%, and 40%), and mixtures of FFW with tuff (20% and 40%). The sintering was conducted at the different temperatures and with the different time duration in order to find the optimal composition and conditions for crystallization. The increase of temperature, from 1100 to 1480°C, and sintering time, from 4 to 6h resulted in a higher content of hematite crystal in the obtained glass-ceramic (up to 44%). The glass-ceramics sintered from pure FFW (1080°C/36h) has good mechanical properties, such as high propagation speed (4500 m/s) and hardness (10800 MPa), as well as very good thermal stability. The glass-ceramics obtained from mixtures shows weaker mechanical properties compared to that obtained from pure FFW. The mixtures of FFW with tuff have a significantly lower bulk density compared to other obtained glass-ceramics. Our results indicate that FFW can be applied as a basis for obtaining the construction materials.",
journal = "Science of Sintering",
title = "Application of the final flotation waste for obtaining the glass-ceramic materials",
volume = "49",
number = "4",
pages = "431-443",
doi = "10.2298/SOS1704431C"
}

Cocić, M., Logar, M., Erić, S., Tasić, V., Dević, S., Cocić, S.,& Matović, B.. (2017). Application of the final flotation waste for obtaining the glass-ceramic materials. in Science of Sintering, 49(4), 431-443.
https://doi.org/10.2298/SOS1704431C

Cocić M, Logar M, Erić S, Tasić V, Dević S, Cocić S, Matović B. Application of the final flotation waste for obtaining the glass-ceramic materials. in Science of Sintering. 2017;49(4):431-443.
doi:10.2298/SOS1704431C .

Cocić, Mira, Logar, Mihovil, Erić, Suzana, Tasić, Viša, Dević, Snežana, Cocić, Saša, Matović, Branko, "Application of the final flotation waste for obtaining the glass-ceramic materials" in Science of Sintering, 49, no. 4 (2017):431-443,
https://doi.org/10.2298/SOS1704431C . .