Scholarlink

<p>High salinity wastewater contains a large number of metal ions, among which alkali metal ions are difficult to remove with ordinary adsorption materials due to their high concentration, small radius, and low polarization. In this paper, the metal–organic framework MIL-121 with high water stability was prepared by a simple hydrothermal method based on porous metal–organic frameworks (MOFs). Graft 4-aminobenzo-15-crown ether (ACE), and utilize the host–guest coordination of ACE as the active center of adsorbent to recognize alkali metal Na(I) directionally. The MIL-121-<i>g</i>-ACE composite material prepared by covalent bonding of 4-aminobenzo-15-crown-5-ether with MIL-121 not only demonstrated selective adsorption properties for alkali metals but also showed good water stability. The adsorption experiment demonstrated that the material's adsorption capacity could reach 0.86&#xa0;mmol/g for Na(I). After 7 adsorption–desorption cycles, the adsorbent continued to demonstrate good cycle stability, thus proving that the newly developed adsorbent has potential applications for removing Na(I) from high-salt wastewater.</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

Preparation of MOFs composite adsorbents and selective adsorption of monovalent alkali metal ions in high salt waste water

  • 期刊论文

  • 发表日期：

    2025年8月7日

查看全文
  • Yaoyao Wang,
  • Kaifei Qi,
  • Weifang Zhang,
  • Naili Tao,
  • Jianning Wu,
  • Guihua Meng

摘要

High salinity wastewater contains a large number of metal ions, among which alkali metal ions are difficult to remove with ordinary adsorption materials due to their high concentration, small radius, and low polarization. In this paper, the metal–organic framework MIL-121 with high water stability was prepared by a simple hydrothermal method based on porous metal–organic frameworks (MOFs). Graft 4-aminobenzo-15-crown ether (ACE), and utilize the host–guest coordination of ACE as the active center of adsorbent to recognize alkali metal Na(I) directionally. The MIL-121-g-ACE composite material prepared by covalent bonding of 4-aminobenzo-15-crown-5-ether with MIL-121 not only demonstrated selective adsorption properties for alkali metals but also showed good water stability. The adsorption experiment demonstrated that the material's adsorption capacity could reach 0.86 mmol/g for Na(I). After 7 adsorption–desorption cycles, the adsorbent continued to demonstrate good cycle stability, thus proving that the newly developed adsorbent has potential applications for removing Na(I) from high-salt wastewater.