The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers
Апстракт
The sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid onto the anion exchange resins Dowex 1-X8 and Dowex 2-X8 from aqueous solutions of between pH I and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were investigated. The absorption and reflectance spectra of the sorbed dye were traced. The immobilized reagent retained chromic characteristics similar to those it had in solution. The mechanism of sorption was investigated under static conditions in the temperature range of 0 to 25degreesC by following the amount of sorbed dye as a function of contact time. The sorption was a first-order process in all cases. Pore diffusion was found to be the rate-limiting step in the sorption process. Diffusion coefficient values of from 6.0 x 10(-7) to 7.4 x 10(-7) cm(2)/s were calculated from the experimental results. The values of the activation energy of PACA sorption were found to be -8.56 a...nd -8.05 kJ/mol for Dowex 1-X8 and Dowex 2-X8, respectively.
Извор:
Journal of Analytical Chemistry, 2003, 58, 12, 1114-1119
DOI: 10.1023/B:JANC.0000008948.61643.ae
ISSN: 1061-9348
WoS: 000187578900003
Scopus: 2-s2.0-3543060663
Колекције
Институција/група
VinčaTY - JOUR AU - Vasić, Vesna M. AU - Savić, Jasmina AU - Milonjić, Slobodan K. PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2696 AB - The sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid onto the anion exchange resins Dowex 1-X8 and Dowex 2-X8 from aqueous solutions of between pH I and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were investigated. The absorption and reflectance spectra of the sorbed dye were traced. The immobilized reagent retained chromic characteristics similar to those it had in solution. The mechanism of sorption was investigated under static conditions in the temperature range of 0 to 25degreesC by following the amount of sorbed dye as a function of contact time. The sorption was a first-order process in all cases. Pore diffusion was found to be the rate-limiting step in the sorption process. Diffusion coefficient values of from 6.0 x 10(-7) to 7.4 x 10(-7) cm(2)/s were calculated from the experimental results. The values of the activation energy of PACA sorption were found to be -8.56 and -8.05 kJ/mol for Dowex 1-X8 and Dowex 2-X8, respectively. T2 - Journal of Analytical Chemistry T1 - The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers VL - 58 IS - 12 SP - 1114 EP - 1119 DO - 10.1023/B:JANC.0000008948.61643.ae ER -
@article{ author = "Vasić, Vesna M. and Savić, Jasmina and Milonjić, Slobodan K.", year = "2003", abstract = "The sorption of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid onto the anion exchange resins Dowex 1-X8 and Dowex 2-X8 from aqueous solutions of between pH I and 10 was studied spectrophotometrically. Conditions for obtaining modified sorbents with a given capacity for the azo compound were investigated. The absorption and reflectance spectra of the sorbed dye were traced. The immobilized reagent retained chromic characteristics similar to those it had in solution. The mechanism of sorption was investigated under static conditions in the temperature range of 0 to 25degreesC by following the amount of sorbed dye as a function of contact time. The sorption was a first-order process in all cases. Pore diffusion was found to be the rate-limiting step in the sorption process. Diffusion coefficient values of from 6.0 x 10(-7) to 7.4 x 10(-7) cm(2)/s were calculated from the experimental results. The values of the activation energy of PACA sorption were found to be -8.56 and -8.05 kJ/mol for Dowex 1-X8 and Dowex 2-X8, respectively.", journal = "Journal of Analytical Chemistry", title = "The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers", volume = "58", number = "12", pages = "1114-1119", doi = "10.1023/B:JANC.0000008948.61643.ae" }
Vasić, V. M., Savić, J.,& Milonjić, S. K.. (2003). The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers. in Journal of Analytical Chemistry, 58(12), 1114-1119. https://doi.org/10.1023/B:JANC.0000008948.61643.ae
Vasić VM, Savić J, Milonjić SK. The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers. in Journal of Analytical Chemistry. 2003;58(12):1114-1119. doi:10.1023/B:JANC.0000008948.61643.ae .
Vasić, Vesna M., Savić, Jasmina, Milonjić, Slobodan K., "The kinetics of 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene-3,6-disulfonic acid immobilization on anion exchangers" in Journal of Analytical Chemistry, 58, no. 12 (2003):1114-1119, https://doi.org/10.1023/B:JANC.0000008948.61643.ae . .