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Sorption of cobalt (II) and chromium (III) ions to nitrogen‐ and sulfur‐containing polyampholyte on the basis of polyvinylchloride
Author(s) -
Bekchanov Davron,
Kawakita Hidetaka,
Mukhamediev Mukhtarjan,
Khushvaktov Suyun,
Juraev Murod
Publication year - 2021
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5209
Subject(s) - sorption , adsorption , aqueous solution , chemisorption , inorganic chemistry , materials science , metal ions in aqueous solution , enthalpy , chromium , freundlich equation , cobalt , sulfur , ion exchange , metal , ion , chemistry , organic chemistry , metallurgy , thermodynamics , physics
In this article, we studied the process of obtaining nitrogen‐ and sulfur‐containing polyampholyte by chemical modification of sulphocation exchanger. Which is synthesized based on polyvinyl chloride (PVC), with polyethylenepolyamine. Besides, the PVC and synthesized ion exchange resins were characterized using different tools such as FT‐IR, scanning electron microscope, and energy‐dispersive X‐ray. Moreover, the synthesized polyampholyte was used as effective adsorbents for removing Co (II) and Cr (III) ions from aqueous solutions. The Freundlich isotherm and the pseudo‐second order kinetic model were more consistent with the removal of metal ions from aqueous solutions. In the case of Co (II) and Cr (III), the maximum adsorption capacity was 3.45 and 3.97 mmol g −1 , respectively. The thermodynamic parameters of the sorption process of metal ions such as free energy (Δ G ), enthalpy (Δ Н ), and entropy (Δ S ) of the system were calculated. Furthermore, we find that the adsorption processes were spontaneous and chemisorption.