Abstract
The process of Pd(II) sorption from hydrochloric acid solutions was studied in the pH range of 0.5–5.0 in the presence of Pt(IV) and a number of non-noble metal ions by poly(N-2-sulfoethylallylamine) (degrees of modification by sulfoethyl groups of 0.5 and 1.0) crosslinked with epichlorohydrin. It is shown that the degree of extraction of Pd(II) from multicomponent solutions containing transition metal ions Cu(II), Ni(II), Co(II), Zn(II), Cd(II), Mg(II), Pt( IV) is the largest. The selectivity coefficients of KPd(II)/Pt(IV) increase with an increase in the content of sulfoethyl groups in the aminopolymer and an increase in pH, which indicates that the Pd(II) sorption proceeds predominantly via the complex formation mechanism. It was found that the sorption equilibrium in the systems metal salt solution–sorbent is achieved within 240 and 120 min of phase contact for poly(N-2-sulfoethylallylamines) with modification degrees of 0.5 and 1.0, respectively. Under dynamic conditions, the studied sorbent, along with Pd(II), to a large extent extracts accompanying metal ions, which indicates a significant contribution of ion exchange to the mechanism of the sorption process.
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The study was supported by the grant of the Russian Science Foundation (Russian Science Foundation) no. 21-73-00052, https://rscf.ru/project/21-73-00052/.
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L.M.k. Alifkhanova: a study of the sorption selectivity of noble metal ions by sulfoethylated polyallyamine under static conditions; K.Ya. Kuznetsova: a study of the sorption selectivity of noble metal ions by sulfoethylated polyallyamine under dynamic conditions; L.K. Neudachina and Yu.S. Petrova: researching the sorption kinetics of metal ions by the studied sorbents and carrying out mathematical processing of kinetic curves; E.O. Zemlyakova and A.V. Pestov: synthesis of the studied sorbents.
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Translated from Zhurnal Prikladnoi Khimii, No. 3, pp. 399–408, March, 2022 https://doi.org/10.31857/S0044461822030136
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Alifkhanova, L.M.k., Petrova, Y.S., Kuznetsova, K.Y. et al. Sorption Selectivity of Palladium(II) by Poly(N-2-Sulfoethylallylamine) under Static and Dynamic Conditions. Russ J Appl Chem 95, 451–459 (2022). https://doi.org/10.1134/S1070427222030168
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DOI: https://doi.org/10.1134/S1070427222030168