ZHANG Shuang1,DING Xinxin2,YAN Liangguo1
(1.School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China;2.Shandong Shenying Environmental Protection Technology Co.,Ltd.,Jinan,250100,China)
Abstract：Hydrotalcite,hydrotalcite-like compounds and intercalated hydrotalcite are called layered double hydroxides (LDHs).Based on the analysis of their layered structure,the preparation method of modified LDHs and their application progress in wastewater treatment were reviewed.The preparation of modified LDHs mainly includes coprecipitation method,hydrothermal and solvothermal method,ion exchange method and calcination recovery method.The coprecipitation process is simple,the condition is easy to control and the synthesis cycle is short.Hydrothermal and solvothermal products have high particle purity,controllable crystal shape and low production cost.The reaction time of the ion-exchange method is short,and the LDHs performance is adjusted and the layered structure is maintained by accommodating different anions between layers.The method of calcination recovery uses “memory effect” to realize the reuse of LDHs.Magnetic LDHs has superparamagnetism,which can quickly recover the solid adsorbent.Modified LDHs have high anion exchange capacity,good thermal stability and large specific surface area,which can effectively adsorb and remove heavy metal ions,organic pollutants and inorganic anions in wastewater.Modified LDHs can be widely used in catalysis,adsorption,medicine,flame retardant,ion exchange and other fields.
Keywords：layered double hydroxides; modification; adsorption and removal; wastewater treatment
中图分类号：X52
文献标志码：A
文章编号：1008-5548(2021)01-0001-10
DOI：10.13732/j.issn.1008-5548.2021.01.001
收稿日期：2020-03-30，修回日期：2020-05-29，在线出版时间：2020-06-18 08:57。
基金项目：国家自然科学基金项目,编号:21577048。
第一作者简介：张爽(1998—),女,硕士研究生,研究方向为水污染控制技术。E-mail:zhangshuang0107@163.com。
通信作者简介：闫良国(1971—),男,博士,教授,博士生导师,研究方向为环境功能材料。E-mail:chm_yanlg@ujn.edu.cn。
