Scholarlink

<p>A simple and efficient hydrothermal method was developed to synthesize magnesium–aluminum layered double hydroxide modified aeolian sand (MALAS-2) as a low-cost and eco-friendly adsorbent for the effective removal of fluoride from wastewater. Characterization of morphology and structure confirmed that MALAS-2 has a layered composite structure, and Mg–Al LDH was successfully loaded on the surface of aeolian sand with high phase purity. The adsorption kinetics showed that fluoride removal by MALAS-2 followed the pseudo-second-order model. The adsorption isotherm was best described by the Langmuir model with a maximum adsorption capacity of 98.4&#xa0;mg&#xa0;g<sup>−1</sup>. MALAS-2 maintained high defluorination performance across a wide pH range and in the presence of competing anions. Density functional theory (DFT) calculations verified the strong affinity of MALAS-2 toward fluoride ions. The adsorption mechanism was elucidated by FTIR and XPS analyses, which indicated that ligand exchange with surface hydroxyl groups dominated the fluoride uptake. Moreover, desorption-regeneration and actual wastewater experiments further demonstrated the practical application potential of MALAS-2 in fluoride-containing water treatment.</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

A novel composite of Mg–Al layered double hydroxide/aeolian sand for enhanced removal of fluoride from water

  • 期刊论文

  • 发表日期：

    2026年5月18日

查看全文
  • Qianxi Li,
  • Zhen Jin,
  • Jianguo Zhou,
  • Shuhao Zhou

摘要

A simple and efficient hydrothermal method was developed to synthesize magnesium–aluminum layered double hydroxide modified aeolian sand (MALAS-2) as a low-cost and eco-friendly adsorbent for the effective removal of fluoride from wastewater. Characterization of morphology and structure confirmed that MALAS-2 has a layered composite structure, and Mg–Al LDH was successfully loaded on the surface of aeolian sand with high phase purity. The adsorption kinetics showed that fluoride removal by MALAS-2 followed the pseudo-second-order model. The adsorption isotherm was best described by the Langmuir model with a maximum adsorption capacity of 98.4 mg g−1. MALAS-2 maintained high defluorination performance across a wide pH range and in the presence of competing anions. Density functional theory (DFT) calculations verified the strong affinity of MALAS-2 toward fluoride ions. The adsorption mechanism was elucidated by FTIR and XPS analyses, which indicated that ligand exchange with surface hydroxyl groups dominated the fluoride uptake. Moreover, desorption-regeneration and actual wastewater experiments further demonstrated the practical application potential of MALAS-2 in fluoride-containing water treatment.