C 55 Choice of optimal conditions for the dynamic concentration of silver(I) ions from complex solutions with sulfoethylated polyaminostyrenes / L. M. Alifkhanova, Y. S. Petrova, S. N. Bosenko [и др.] // Russian Journal of Inorganic Chemistry. - 2021. - Т. 66, № 4. - С. 578-585 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: This work was intended to study the selectivity of silver(I) ion adsorption with sulfoethylated polyaminostyrenes under dynamic conditions. The greatest selectivity of the extraction of silver(I) ions in the presence of copper(II) ions is at pH 6.0 and a solution flow rate of 2 mL/min. The breakthrough curves of metal adsorption were obtained in the joint presence of sorbates from ammonium acetate buffer solution. The dynamic capacities of adsorbents, rate constants of reactions, and 50% sorbate breakthrough times were determined. The silver(I) adsorption selectivity increases with an increase in degree of substitution of polyaminostyrenes. The breakthrough curves were fitted with the Thomas, Adams–Bohardt, and Yoon–Nelson models. For the quantitative desorption of silver(I) ions from the adsorbents, 20.0 mL of 1 M nitric acid is most appropriate. |