СЕЛЕКТИВНАЯ СОРБЦИЯ ИОНОВ СЕРЕБРА ИЗ ВОДНЫХ РАСТВОРОВ ПОЛИ(N-ТИОКАРБАМОИЛ- 3-АМИНОПРОПИЛСИЛСЕСКВИОКСАНОМ)

科研成果: Article同行评审

摘要

The accumulation of electronic waste (e-waste) on the ground leads to environmental pollution with toxic metal ions, which subsequently harms all living organisms. Many countries still use hydrometallurgical or manual methods to extract silver ions from e-waste. These methods are unsustainable and highly toxic; therefore, it becomes necessary to introduce new environmentally compatible methods for separating valuable components from objects of various compositions.This article proposes an environmentally compatible method for the extraction of silver ions from multicomponent systems using poly(N-thiocarbamoyl-3-aminopropylsilsesquioxane). The sorbent surface was studied by Fourier-transform infrared spectroscopy using an attenuated total internal reflection accessory. The concentration of grafted thiourea groups is 1.39 mmol/g according to elemental analysis. It has been determined that this sorbent is capable of quantitatively extracting silver ions in the pH range from 0 to 6 at a concentration of silver ions in the initial solution of 1·10-4 mol/dm3; the static sorption capacity for silver ions under experimental conditions reaches 1.22 mmol/g. When sorption is carried out in dynamic mode, the value of the dynamic capacity before breakthrough is 0.046 mmol/g, and the value of the total dynamic capacity for silver ions is 0.132 mmol/g. The highest desorption (71-78 %) is achieved using sulfuric acid solutions with a thiourea concentration gradient.
投稿的翻译标题SELECTIVE SORPTION OF SILVER IONS FROM AQUEOUS SOLUTIONS USING POLY(N-THIOCARBAMOYL- 3-AMINOPROPYLSILSESQUIOXANE)
源语言Russian
页(从-至)57-71
页数15
期刊Эталоны. Стандартные образцы
18
2
DOI
Published - 2022

GRNTI

  • 31.00.00 CHEMISTRY

Level of Research Output

  • VAK List
  • Russian Science Citation Index

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