摘要
合成了磁性二氧化钛/氧化石墨烯(磁性TiO2/GO)复合材料,用其处理U(Ⅵ)-Cd(Ⅱ)共存二元体系废水。考察了初始pH、磁性TiO2/GO投加量和反应时间对U(Ⅵ)去除效果的影响,并用红外光谱仪和X射线光电子能谱仪探究去除机理。结果表明,磁性TiO2/GO为介孔层状聚集物,在可见光范围内光催化能力较好。在pH为6、投加量为15 mg、反应时间为120 min条件下对U(Ⅵ)的去除效果最佳(去除率为93.72%)。磁性TiO2/GO选择性去除U(Ⅵ)的主要机制为氨基官能团络合作用和光催化还原作用。
Magnetic titanium dioxide/graphite oxide(magnetic TiO2/GO)composites were synthesized and used to treat U(Ⅵ)-Cd(Ⅱ)coexisting binary system wastewater.The effects of initial pH,the dosage of magnetic TiO2/GO,and the reaction time on the removal of U(Ⅵ)were investigated.The removal mechanism of U(Ⅵ)was explored us-ing FTIR and X-ray photoelectron spectroscopy.The result showed that the synthesized magnetic TiO2/GO was a kind of layered aggregate with mesoporous structure which had perfect photocatalytic ability in visible light range.With the pH of 6,the magnetic TiO2/GO dosage of 15 mg and reaction time of 120 min,the maximum removal efficiency of U(Ⅵ)by magnetic TiO2/GO was up to 93.72%.The complexation of amino functional groups and photocatalytic re-duction of magnetic TiO2/GO are probably the key points for selectivity of U(Ⅵ)removal.
作者
唐振平
肖莎莎
谢严兴
毕玉玺
刘迎九
周帅
Tang Zhenping;Xiao Shasha;Xie Yanxing;Bi Yuxi;Liu Yingjiu;Zhou Shuai(Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology,University of South China,Hengyang 421001,China;Hengyang Key Laboratory of Theory and Technology of Nuclear Fuel Geological Cycle,University of South China,Hengyang 421001,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2020年第12期54-59,共6页
Industrial Water Treatment
基金
湖南省教育厅项目(18C0433)
湖南省财政厅项目(190SJY001)。
关键词
磁性二氧化钛
氧化石墨烯
含铀废水
重金属
选择性
magnetic titanium dioxide
graphene oxide
uranium wastewater
heavy metal
selectivity
作者简介
唐振平(1962-),博士,教授。E-mail:zptang01@126.com;通讯作者:周帅。博士,讲师,E-mail:zs402606665@126.om。
