中南民族大学学报（自然科学版）2024，Vol.43Issue(6)：731-741,11.DOI:10.20056/j.cnki.ZNMDZK.20240705
基于"记忆效应"合成纳米花状Mg/Al/Fe-CLDH高效去除Cd(Ⅱ)
Synthesis of nanoflower-like Mg/Al/Fe-CLDH based on"memory effect"for efficient Cd(Ⅱ)removal
摘要
Abstract
A novel hydrotalcite-like adsorbent,Mg/Al/Fe-CLDH(CFMA),was synthesized by"memory effect"for the removal of Cd(Ⅱ).CFMA was analyzed by SEM-EDS,XRD,BET,TGA,FT-IR and XPS and proved to be a nanoflower-like mesoporous adsorbent with large specific surface area.Batch adsorption experiment results indicated that 0.5 g·L-1 CFMA was able to effect high removal efficiency for 20 mg·L-1 Cd(Ⅱ)at pH 4.0-7.0.The adsorption followed the quasi-secondary kinetics and Freundlich adsorption isothermal model with a maximum adsorption capacity of 396.1 mg·g-1.Mechanism characterization showed that the removal of Cd(Ⅱ)involved the exchange of ligands and surface complexes with surface hydroxyl groups,and the formation of CdCO3 precipitates between the hydrotalcite layers.关键词
类水滑石吸附剂/介孔材料/镉Key words
hydrotalcite-like adsorbent/mesoporous material/cadmium分类
化学化工引用本文复制引用
占伟,李泓,谭杰,李瑞月,陈东辉..基于"记忆效应"合成纳米花状Mg/Al/Fe-CLDH高效去除Cd(Ⅱ)[J].中南民族大学学报（自然科学版）,2024,43(6):731-741,11.基金项目
湖北省自然科学基金资助项目(2022CFB419) （2022CFB419）
中央高校基本科研业务费专项资金资助项目(CZQ23035) （CZQ23035）
