镁铝双金属氢氧化物对Cu^(2+)的吸附  

Adsorption of copper ion(Ⅱ) by Mg-Al double hydroxides

作　　者：王孝华[1] 李传强[1] 汤琪[1] 牟元华[1] 张燕宇[1] 

机构地区：[1]重庆交通大学材料科学与工程学院,重庆400074

出　　处：《广西大学学报（自然科学版）》2016年第3期903-907,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21307168);重庆市自然科学基金资助项目(cstcjj A50016)

摘　　要：为研究镁铝双金属氢氧化物(MgAl-LDHs)对铜离子的吸附性能,采用了共沉淀的方法合成了镁铝双金属氢氧化物(MgAl-LDHs),并利用镁铝双金属氢氧化物(MgAl-LDHs)对铜离子进行吸附,同时考察了溶液p H值、吸附时间、吸附剂用量、溶液初始浓度对铜离子吸附率的影响,并利用XRD对产品结构进行了表征。结果表明:在常温时,当溶液pH为9、吸附时间为160 min、吸附剂用量为4 g、溶液初始浓度为25 mmol/L的条件下,MgAl-LDHs对铜离子的吸附率达到最大值为90.84%。In order to study the adsorption property of copper ion with magnesium aluminatel double hydroxides （ MgAl-LDHs）, MgAl-LDHs was prepared by using coprecipitation method, and using theMgAl-LDHs for adsorption of Cu （ Ⅱ ）. The effects of solution pH, adsorption time, adsorption agent dosage, and initial concentration on the adsorption rate of copper ion were studied. The prod-uct structure was characterized by XRD. The results showed that, under the experimental conditions of pH 9 solution, 160 min adsorption time, 4 g adsorbent dosage, and 25 mmol/L initial concentra-tion, the adsorption rate of MgM-LDHs for copper ion reached the maximum value of 90. 84% at room temperature.

关 键 词：镁铝双金属氢氧化物 铜离子(Ⅱ) 吸附率 

分 类 号：TQ139[化学工程—无机化工] X131[环境科学与工程—环境科学]