Scholarlink

Abstract <p>Effects of the percentage and type of functional groups on the selectivity of modified poly(3-aminopropyl)silsesquioxanes (PSs) in silver(I) extraction from multicomponent aqueous solutions was studied. The sorbents were prepared by modifying poly(3-aminopropyl)silsesquioxane with sulfur-containing reagents in various temperature schedules in order to vary the ratio of monosubstituted to disubstituted thiourea groups as well as amino groups. The sorbent structure was determined by IR spectroscopy and elemental analysis. An increase in the percentage of monosubstituted thiourea groups (from 40 to 75%) in the sorbent structure was found to increase the silver(I) percent extraction and selectivity at in the range 1–4. A&#xa0;heating stage was added to help the formation of a larger number of monosubstituted groups. The recovery of accompanying metal (copper(II), calcium(II), and magnesium(II)) ions was minimal over a wide pH range. Our results will help the purposeful regulation of the sorption and selective properties of materials via varying the ratio of the surface functional groups of the sorbent.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Silver(I) Selectivity of Modified Poly(3-Aminopropyl)silsesquioxanes as Influenced by the Percentage and Type of Its Functional Groups

  • 期刊论文

  • 发表日期：

    2025年9月1日

查看全文
  • E. A. Mel’nik,
  • Yu. S. Petrova,
  • V. A. Osipova,
  • A. V. Pestov,
  • L. K. Neudachina,
  • A. A. Mironova

摘要

Abstract

Effects of the percentage and type of functional groups on the selectivity of modified poly(3-aminopropyl)silsesquioxanes (PSs) in silver(I) extraction from multicomponent aqueous solutions was studied. The sorbents were prepared by modifying poly(3-aminopropyl)silsesquioxane with sulfur-containing reagents in various temperature schedules in order to vary the ratio of monosubstituted to disubstituted thiourea groups as well as amino groups. The sorbent structure was determined by IR spectroscopy and elemental analysis. An increase in the percentage of monosubstituted thiourea groups (from 40 to 75%) in the sorbent structure was found to increase the silver(I) percent extraction and selectivity at in the range 1–4. A heating stage was added to help the formation of a larger number of monosubstituted groups. The recovery of accompanying metal (copper(II), calcium(II), and magnesium(II)) ions was minimal over a wide pH range. Our results will help the purposeful regulation of the sorption and selective properties of materials via varying the ratio of the surface functional groups of the sorbent.