四川轻化工大学学报（自然科学版）2023，Vol.36Issue(6)：17-25,9.DOI:10.11863/j.suse.2023.06.03
凹凸棒土对Cr(Ⅵ)的吸附去除研究进展
Research Progress on Adsorption and Removal of Hexavalent Chromium by Attapulgite
摘要
Abstract
Heavy metal chromium is taken as one of the five most toxic elements,and Cr(Ⅵ)is the most toxic valence ion and generally exists in forms of Cr2O2-7、CrO2-4、HCrO-4 and so on.The removal of hexavalent chromium in wastewater has become a research hot topic.Attapulgite(ATP)is a natural hydrous magnesium-rich aluminosilicate clay mineral with chain layered structure.There are large numbers of micropores along its structural fiber direction.ATP has the characteristics of large specific surface area,a variety of active groups on the surface and excess charge,which is widely used for the adsorption and removal of heavy metals.As natural ATP is easy to agglomerate into crystal bundles,contains more impurities,and shows a negative charge ability,the adsorption performance of hexavalent chromium is unsatisfactory.Therefore,various modifications are often needed to improve its adsorption and removal rate of Cr(Ⅵ).In order to provide a useful reference for the subsequent modification of natural ATP and the comprehensive utilization of adsorbed heavy metal chromium,the current research progress on the removal of Cr(Ⅵ)by ATP and its modified materials at home and abroad is summarized in the paper.Besides,the prospect of the research of new adsorbents is put forward.关键词
凹凸棒土/Cr(Ⅵ)/吸附/改性Key words
attapulgite/hexavalent chromium/adsorption/modification分类
化学化工引用本文复制引用
陈文,周嫄,朱霞萍..凹凸棒土对Cr(Ⅵ)的吸附去除研究进展[J].四川轻化工大学学报（自然科学版）,2023,36(6):17-25,9.基金项目
国家自然科学基金地区项目(42267007) （42267007）
江苏省凹土资源利用重点实验室开放基金项目(HPK202201) （HPK202201）
