Scholarlink

<p>This study investigated the potential of raw and microwave-assisted expanded vermiculite as low-cost adsorbents for removing arsenic from aqueous solutions. SEM was used to examine vermiculites morphology, EDX for elemental composition, XRD for crystal structure analysis, and N₂ gas adsorption at 77&#xa0;K for porosity assessment. The adsorption kinetics utilized empirical models such as pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models examined how the two materials absorb pollutants. While raw vermiculite works primarily by physisorption, expanded vermiculite heated in a microwave makes it better at removing arsenic by improving its adsorption performance. Results found that both types of vermiculite can be used as low-cost options for cleaning up arsenic, with the expanded type being best for tasks that need it to absorb more harmful substances.</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

Rapid fabrication of expanded vermiculite with microwave as low-cost adsorbent for removal of arsenic from water

  • 期刊论文

  • 发表日期：

    2025年9月14日

查看全文
  • Thu Ha Dao,
  • Duong Duc La,
  • Van Chinh Tran,
  • Manh Ha Nguyen,
  • Duy Dat Nguyen,
  • Van Huy Nguyen,
  • Van Huyen Luu,
  • Thi Hoai Phuong Nguyen

摘要

This study investigated the potential of raw and microwave-assisted expanded vermiculite as low-cost adsorbents for removing arsenic from aqueous solutions. SEM was used to examine vermiculites morphology, EDX for elemental composition, XRD for crystal structure analysis, and N₂ gas adsorption at 77 K for porosity assessment. The adsorption kinetics utilized empirical models such as pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models examined how the two materials absorb pollutants. While raw vermiculite works primarily by physisorption, expanded vermiculite heated in a microwave makes it better at removing arsenic by improving its adsorption performance. Results found that both types of vermiculite can be used as low-cost options for cleaning up arsenic, with the expanded type being best for tasks that need it to absorb more harmful substances.