摘要
采用水热合成法制备了二氧化钛改性的石墨烯基材料(RGO/TiO2),将其组装成CDI电极,探究了电吸附去除低浓度Cd^2+的效果,并与RGO电极进行了比较。结果表明,2种电极对Cd^2+的电吸附量随工作电压的升高、Cd^2+初始浓度的增大而增大,随温度的升高而减小;循环流速对Cd^2+的吸附效果影响不明显。RGO/TiO2电极CDI除Cd^2+性能优于RGO电极,电吸附过程满足准一级动力学方程和Freundlich等温吸附模型。
The graphene based materials(RGO/TiO2)modified by titanium dioxide was prepared by hydrothermal synthesis method and assembled into CDI electrode.The removal effect of low concentration Cd^2+by electrosorption was investigated and compared with that of RGO electrode.The results showed that the adsorption capacity of Cd^2+of the two electrodes increased with the increase in working voltage and initial concentration of Cd^2+,but decreased with the increase in temperature.The effect of circulating flow rate on the adsorption of Cd^2+was not obvious.In addition,the CDI removal performance of Cd^2+for RGO/TiO2 electrode was better than that for RGO electrode.The electroso-rption process met the pseudo-first order kinetic model and Freundlich model.
作者
徐斌
张孝飞
何斐
皋海岭
王冉冉
吴文倩
杨文忠
张毅敏
Xu Bin;Zhang Xiaofei;He Fei;Gao Hailing;Wang Ranran;Wu Wenqian;Yang Wenzhong;Zhang Yimin(Nanjing Institute of Environmental Science,Ministry of Ecology and Environmental of the People’s Republic of China,Nanjing 210042,China;College of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 210037,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2020年第10期34-38,共5页
Industrial Water Treatment
基金
江苏省自然科学基金青年科学基金资助项目(BK20170111)
国家自然科学基金青年科学基金资助项目(51808251)
水体污染控制与治理科技重大专项项目(2017ZX07203-004)
江苏省科协青年科技人才托举工程项目。
关键词
电容去离子
石墨烯
水处理
CD^2+
capacitance deionization
graphene
water treatment
cadmium ion
