In this work, zinc ferrite spinel with different zinc contents（ZnxFe3-xO4） was synthesized by a hydrothermal method and used for removing As（V） in aqueous solution. X-ray diffraction（XRD） results indicated that in the crystal structure of ZnxFe3-xO4, the zinc atoms tended to occupy the octahedral sites for x < 0.6 and diffused into the tetrahedral sites gradually with x > 0.6. The size of ZnxFe3-xO4 crystallites increased with the increasing zinc content. Batch adsorption experiments showed that the adsorption isotherms could be well described by the Langmuir model, while the adsorption kinetics followed the pseudo-second-order kinetic model. Zinc ferrite exhibited the highest adsorption capacity towards As（V） when x = 0.6. Study of the mechanism indicated that doping with zinc increased the number of surface hydroxyl groups on ferrite spinel, and thus enhanced the adsorption capacity when x = 0.6. This work revealed the effects of doping site and content of metal atoms on the adsorption ability of ferrite spinel towards As（V）.
类型: 期刊论文
作者: Can Wu,Yunyun Xu,Si Xu,Jingwei Tu,Chen Tian,Zhang Lin
来源: Journal of Environmental Sciences 2019年05期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 化学,环境科学与资源利用
单位: School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology,Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, South China University of Technology
基金: supported by the National Natural Science Foundation of China(Nos.21836002 and 21477129),Guangdong Innovative and Entrepreneurial Research Team Program(No.2016ZT06N569),the Fundamental Research Funds for the Central Universities(Nos.2017PY009 and 2017BQ054)
分类号: X703;O647.3
页码: 248-255
总页数: 8
文件大小: 692K
下载量: 49
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