Preparation of Fe–Co based MOF-74 and its effective adsorption of arsenic from aqueous solution

论文摘要

To obtain a cost-effective adsorbent for the removal of arsenic in water,a novel nanostructured Fe–Co based metal organic framework（MOF-74）adsorbent was successfully prepared via a simple solvothermal method.The adsorption experiments showed that the optimal molar ratio of Fe/Co in the adsorbent was 2:1.The Fe2Co1MOF-74 was characterized by various techniques and the results showed that the nanoparticle diameter ranged from60 to 80 nm and the specific surface area was 147.82 m2/g.The isotherm and kinetic parameters of arsenic removal on Fe2Co1MOF-74 were well-fitted by the Langmuir and pseudo-second-order models.The maximum adsorption capacities toward As（III）and As（V）were 266.52 and 292.29 mg/g,respectively.The presence of sulfate,carbonate and humic acid had no obvious effect on arsenic adsorption.However,coexisting phosphate significantly hindered the removal of arsenic,especially at high concentrations（10 mmol/L）.Electrostatic interaction and hydroxyl and metal–oxygen groups played important roles in the adsorption of arsenic.Furthermore,the prepared adsorbent had stable adsorption ability after regeneration and when used in a real-water matrix.The excellent adsorption performance of Fe2Co1MOF-74 material makes it a potentially promising adsorbent for the removal of arsenic.

论文目录

文章来源

类型: 期刊论文

作者: Jianqiang Sun,Xiaobing Zhang,Anping Zhang,Chunyang Liao

来源: Journal of Environmental Sciences 2019年06期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 环境科学与资源利用

单位: Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology,State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences

基金: supported by the National Key Research and Development Program of China (No. 2016YFA0203102),the National Natural Science Foundation of China (Nos. 21522706,21677167 and 21577127),the Thousand Young Talents Program of China

分类号: X703

页码: 197-207

总页数: 11

文件大小: 1664K

下载量: 164

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