层状复合氢氧化物的结构调控及其吸附重金属离子的研究进展
Research progress on structural tuning and heavy metal ion adsorption of layered double hydroxides
程志杰 1马建中 1杨娜 1张文博 2范倩倩1
作者信息
- 1. 陕西科技大学 轻工科学与工程学院 国家轻工化学实验工程示范中心,陕西 西安 710021
- 2. 陕西科技大学 陕西省轻化工助剂化学与技术协同创新中心,陕西 西安 710021
- 折叠
摘要
层状复合氢氧化物(LDHs)是具有特殊层状结构的阴离子黏土,具有化学组成可调、比表面积大及结构记忆效应独特等性质,在废水处理方面备受关注.调控 LDHs 自身结构,是进一步扩大其应用范围、提高其吸附性能的有效途径.该文介绍了LDHs特殊的层状结构和其自身性质;总结了LDHs最常用的制备方法,即共沉淀法、离子交换法、尿素水解法、煅烧复原法和溶胶-凝胶法等,分别介绍了各种制备方法的原理和特点;综述了LDHs的结构调控对其吸附重金属离子性能的影响,并总结了LDHs对重金属离子的吸附机理;最后,指出了目前 LDHs 在处理含有重金属离子废水研究中面临的挑战,并对该材料未来的研究方向和发展趋势进行了展望.
Abstract
Layered double hydroxides(LDHs)are anionic clays with special layered structure and have attracted much attention in wastewater treatment due to their adjustable chemical composition,large specific surface area and unique structural memory effect.Structure tuning of LDH,is an effective way to further expand their application range and improve their adsorption performance.In this review,the special layered structure of LDHs and their own properties were introduced,followed by summarization on the five most commonly used LDH preparation methods,namely co-precipitation,ion exchange,urea hydrolysis,calcination recovery and sol-gel method,and the principles and characteristics of each preparation method.The influence of LDH structural tuning on their adsorption performance for heavy metal ions were then reviewed,and the adsorption mechanism on heavy metal ions was further summarized.Finally,the current challenges of LDH for the removal of heavy metal ion from wastewater were discussed,and the future research directions and development trends were prospected.
关键词
层状复合氢氧化物/结构调控/吸附/重金属离子/废水处理Key words
layered double hydroxides/structural tuning/adsorption/heavy metal ions/wastewater treatment引用本文复制引用
基金项目
国家自然科学基金重点项目(21838007)
陕西省创新能力支撑计划项目(2021TD-16)
出版年
2024
NETL
NSTL
万方数据