双金属复合氢氧化物在重金属污染土壤/水修复方面的研究进展  

Layered double hydroxides as amendment for remediation of heavy metal ions in water and soil

作　　者：毛方琪 郝培培 孔祥贵[1] 雷晓东[1] 段雪[1] Fangqi Mao;Peipei Hao;Xianggui Kong;Xiaodong Lei;Xue Duan(State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]化工资源有效利用国家重点实验室,北京化工大学,北京100029

出　　处：《中国科学：化学》2021年第5期493-508,共16页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21978023)。

摘　　要：重金属污染土壤/水形势严峻,修复工作迫在眉睫.开发高效率、低成本、易操作的重金属污染土壤/水修复材料及技术极具重要现实意义.类水滑石(又称双金属复合氢氧化物, LDHs)是一类典型的无机层状结构材料.独特的组成及结构特点使得LDHs在重金属离子去除领域表现出良好的应用前景,特别是在原位修复重金属污染土壤领域已实现应用,表现出超稳矿化性能,修复效果显著,同时为重金属污染水修复工作提供了新的思路.本文总结了近年来LDHs作为修复材料在重金属污染土壤/水修复方面的工作,阐述了LDHs材料的结构与性能间的内在关联和作用机理,并对该材料在去除重金属离子方面存在的问题及应用前景进行了汇总和展望.Contaminated water/soil by heavy metal ions has become a critical global issue, and caused severe health risk to humans. As comparation with nanofiltration, ion exchange and reverse osmosis, adsorption strategy is more appropriate application in large-scale with advantages of convenient, affordable and efficient. Therefore, it is urgent to explore the excellent adsorbents with high-performance, low cost and long-term stability. Layered double hydroxides(LDHs), also known as anionic clays, have attracted extensively attention in the field of adsorption due to its special chemical and physical properties. Especially as amendment for in-situ remediation soil, LDHs have displayed excellent performance to immobilize the heavy meatal ions through anchoring those contaminants into the framework of LDHs.Here we review the development of LDHs as amendment for the water and soil contaminated by heavy metal ions,analyzing the removal mechanism in adsorption process, and proposed some options, which is expected to provide useful suggestions in the fabrication of adsorbent contained-LDHs with excellent performance for removal of heavy metal ions.

关 键 词：双金属复合氢氧化物 重金属离子 选择性去除 超稳矿化 土壤/水修复 

分 类 号：X505[环境科学与工程—环境工程]