Sorption of silver (I) in the presence of palladium (II) and gold (III) from hydrochloric acid solutions by poly(N-vinylimidazole) cross-linked with 1,4-bis(bromomethyl)benzene

  • Kseniia Ya. Kuznetsova Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg
  • Julia S. Petrova Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg
  • Daniil A. Kazancev I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS), Ekaterinburg
  • Alexander V. Pestov Ural Federal University named after the first President of Russia B. N. Yeltsin, I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS), Ekaterinburg
  • Ludmila K. Neudachina Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg
DOI: https://doi.org/10.17308/sorpchrom.2025.25/13283
Keywords: sorption, palladium, gold, silver, hydrochloric acid solutions, poly(N-vinylimidazole)

Abstract

The sorption of silver (I) by a material based on poly(N-vinylimidazole) crosslinked with 1,4-bis(bromomethyl) has been studiedbenzene from hydrochloric acid solutions of various compositions, including in the presence of gold (III) and palladium (II). The study was carried out using a limited volume method from solutions with a concentration of hydrochloric acid from 1 to 3 mol/dm3, at an initial concentration of metal ions 5·10-5-1·10-4 mol/dm3 (sorbent – 0.0200 g, Solution – 50.0 cm3). The metal ion content in the solutions was determined by atomic absorption spectroscopy. As a result of the conducted studies, it was found that poly(N-vinylimidazole) silver (I) is extracted to the greatest extent from 1 mol/dm3 HCl. In this case, selective extraction of silver (I) in the presence of gold (III) and palladium (II) by poly(N-vinylimidazole) under static conditions is not achieved. It is shown that 120 minutes of phase contact is sufficient to achieve sorption equilibrium in the noble metal salt solution – sorbent systems. The use of 3.5 mol/dm3 hydrochloric acid, 0.1 mol/dm3 ammonia solution and 1% thiourea solution in 2 mol/dm3 HCl as regenerants does not allow achieving quantitative desorption of metals from the sorbent (the maximum value of the degree of desorption is < 80%).

The dynamics of sorption was studied by passing a solution with a concentration of noble metals
5·10-5 mol/dm3 through a concentrating cartridge containing 0.1000 g of sorbent. The flow rate of the solution was 2 cm3/min. It was found that under these conditions, the sorbent under study jointly extracts silver (I) and gold (III) from 1 mol/dm3 HCl. To separate them, a sequential elution method is proposed, including the use of an ammonium rhodanide solution with a concentration of 0.5 mol/dm3, followed by a 1% thiourea solution in 2 mol/dm3 HCl. It is shown that the separation of silver (I) and gold (III) is achieved under these conditions. However, the selection of the optimal eluent for quantitative desorption of gold from poly(N-vinylimidazole) requires additional research.

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Author Biographies

Kseniia Ya. Kuznetsova, Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg

Post-graduate Student, Assistant at the Department of Analytical Chemistry and Environmental Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg, Russia

Julia S. Petrova, Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg

Head of the Department of Analytical Chemistry and Environmental Chemistry at the Institute of Natural Sciences and Mathematics, PhD, Associate Professor, Ural Federal University, Yekaterinburg, Russia

Daniil A. Kazancev, I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS), Ekaterinburg

a post–graduate student at the I.Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia

Alexander V. Pestov, Ural Federal University named after the first President of Russia B. N. Yeltsin, I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS), Ekaterinburg

 Associate Professor of the Department of Organic Chemistry and High-Molecular Compounds of the Institute of Natural Sciences and Mathematics, PhD, Associate Professor, Ural Federal University, Yekaterinburg, Russia; Acting Head of the Laboratory of Organic Materials at the I.Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia

Ludmila K. Neudachina, Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg

Associate Professor, Department of Analytical Chemistry and Environmental Chemistry, Institute of Natural Sciences and Mathematics, PhD, Associate Professor, Ural Federal University, Yekaterinburg, Russia

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Published
2025-11-08
How to Cite
Kuznetsova, K. Y., Petrova, J. S., Kazancev, D. A., Pestov, A. V., & Neudachina, L. K. (2025). Sorption of silver (I) in the presence of palladium (II) and gold (III) from hydrochloric acid solutions by poly(N-vinylimidazole) cross-linked with 1,4-bis(bromomethyl)benzene. Sorbtsionnye I Khromatograficheskie Protsessy, 25(4), 556-566. https://doi.org/10.17308/sorpchrom.2025.25/13283
Issue
Vol 25 No 4 (2025): Sorbtsionnye i Khromatograficheskie Protsessy
Section
Статьи