Scholarlink

Abstract <p>The influence of the “aqueous solution of copper sulfate–hydrogel sorbent based on chitosan and silicon dioxide” heterophase system have been studied. The most important sorption characteristics of the process of extracting Cu(II) ions from aqueous solutions of CuSO<sub>4</sub> in the linear coordinates of Langmuir and Freundlich, the theory of volumetric filling of micropores (TVFM at <i>n</i> = 2), and Temkin. The values of changes in thermodynamic potentials during the sorption extraction of Cu(II) cations from aqueous solutions in the temperature range of 298–333 K were obtained. In general, the process is thermodynamically spontaneous and exothermic; the characteristic curves of the sorbent indicate that the conditions of temperature invariance are met. The distribution of isosteric heats of sorption with increasing degree of surface filling was obtained.</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

Thermodynamics of Sorption of Cu(II) from Aqueous Solutions by Modified Chitosan

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • V. A. Gabrin,
  • T. E. Nikiforova

摘要

Abstract

The influence of the “aqueous solution of copper sulfate–hydrogel sorbent based on chitosan and silicon dioxide” heterophase system have been studied. The most important sorption characteristics of the process of extracting Cu(II) ions from aqueous solutions of CuSO4 in the linear coordinates of Langmuir and Freundlich, the theory of volumetric filling of micropores (TVFM at n = 2), and Temkin. The values of changes in thermodynamic potentials during the sorption extraction of Cu(II) cations from aqueous solutions in the temperature range of 298–333 K were obtained. In general, the process is thermodynamically spontaneous and exothermic; the characteristic curves of the sorbent indicate that the conditions of temperature invariance are met. The distribution of isosteric heats of sorption with increasing degree of surface filling was obtained.