Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers
Апстракт
dThe sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid (PACA) onto the anion exchange resins, Dowex 1-X8 and Dowex 2-X8, from aqueous solutions with pH between 1 and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were determined. The absorption and reflectance spectra of the sorbed dye were recorded. The immobilized reagent retained similar chromic characteristics as in the solution. The sorption mechanism was investigated under static conditions in the temperature range from 0 to 25 degreesC, by determining the amount of sorbed dye as a function of contact time. The sorption was a first order process in all cases. The pore diffusion was found to be a rate-limiting step in the sorption process. The diffusion coefficient values from 6.0 to 7.4 x 10(-7) cm(2) s(-1) were calculated from the experimental results. The activation energy of PACA sorption is - 8.56 and - 8.05 kJ mol(-1) f...or Dowex 1-X8 and Dowex 2-X8, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.
Кључне речи:
azo-dyes / sorption / ion exchangers / kineticsИзвор:
Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 2003, 215, 1-3, 277-284
DOI: 10.1016/S0927-7757(02)00490-9
ISSN: 0927-7757
WoS: 000181662000028
Scopus: 2-s2.0-0037470893
Колекције
Институција/група
VinčaTY - JOUR AU - Vasić, Vesna M. AU - Savić, Jasmina AU - Pavelkić, Vesna M. AU - Milonjić, Slobodan K. PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2615 AB - dThe sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid (PACA) onto the anion exchange resins, Dowex 1-X8 and Dowex 2-X8, from aqueous solutions with pH between 1 and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were determined. The absorption and reflectance spectra of the sorbed dye were recorded. The immobilized reagent retained similar chromic characteristics as in the solution. The sorption mechanism was investigated under static conditions in the temperature range from 0 to 25 degreesC, by determining the amount of sorbed dye as a function of contact time. The sorption was a first order process in all cases. The pore diffusion was found to be a rate-limiting step in the sorption process. The diffusion coefficient values from 6.0 to 7.4 x 10(-7) cm(2) s(-1) were calculated from the experimental results. The activation energy of PACA sorption is - 8.56 and - 8.05 kJ mol(-1) for Dowex 1-X8 and Dowex 2-X8, respectively. (C) 2002 Elsevier Science B.V. All rights reserved. T2 - Colloids and Surfaces. A: Physicochemical and Engineering Aspects T1 - Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers VL - 215 IS - 1-3 SP - 277 EP - 284 DO - 10.1016/S0927-7757(02)00490-9 ER -
@article{ author = "Vasić, Vesna M. and Savić, Jasmina and Pavelkić, Vesna M. and Milonjić, Slobodan K.", year = "2003", abstract = "dThe sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid (PACA) onto the anion exchange resins, Dowex 1-X8 and Dowex 2-X8, from aqueous solutions with pH between 1 and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were determined. The absorption and reflectance spectra of the sorbed dye were recorded. The immobilized reagent retained similar chromic characteristics as in the solution. The sorption mechanism was investigated under static conditions in the temperature range from 0 to 25 degreesC, by determining the amount of sorbed dye as a function of contact time. The sorption was a first order process in all cases. The pore diffusion was found to be a rate-limiting step in the sorption process. The diffusion coefficient values from 6.0 to 7.4 x 10(-7) cm(2) s(-1) were calculated from the experimental results. The activation energy of PACA sorption is - 8.56 and - 8.05 kJ mol(-1) for Dowex 1-X8 and Dowex 2-X8, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.", journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects", title = "Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers", volume = "215", number = "1-3", pages = "277-284", doi = "10.1016/S0927-7757(02)00490-9" }
Vasić, V. M., Savić, J., Pavelkić, V. M.,& Milonjić, S. K.. (2003). Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 215(1-3), 277-284. https://doi.org/10.1016/S0927-7757(02)00490-9
Vasić VM, Savić J, Pavelkić VM, Milonjić SK. Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2003;215(1-3):277-284. doi:10.1016/S0927-7757(02)00490-9 .
Vasić, Vesna M., Savić, Jasmina, Pavelkić, Vesna M., Milonjić, Slobodan K., "Kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulphonic acid immobilization on anion exchangers" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 215, no. 1-3 (2003):277-284, https://doi.org/10.1016/S0927-7757(02)00490-9 . .