工业水处理 ›› 2020, Vol. 40 ›› Issue (10): 34-38. doi: 10.11894/iwt.2019-0989

• 试验研究 • 上一篇    下一篇

石墨烯基材料对低浓度镉离子的电吸附研究

徐斌1(),张孝飞1,何斐1,皋海岭1,王冉冉2,吴文倩1,杨文忠2,张毅敏1,*()   

  1. 1. 生态环境部南京环境科学研究所, 江苏南京 210042
    2. 南京工业大学化学与分子工程学院, 江苏南京 210037
  • 收稿日期:2020-06-11 出版日期:2020-10-20 发布日期:2020-10-21
  • 通讯作者: 张毅敏 E-mail:xubinnies@163.com;zymnies@163.com
  • 作者简介:徐斌(1988-),博士,助理研究员。电话:13952048509, E-mail:xubinnies@163.com
  • 基金资助:
    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

Research on the electrosorption removal of low concentration cadmium ions by graphene based materials

Bin Xu1(),Xiaofei Zhang1,Fei He1,Hailing Gao1,Ranran Wang2,Wenqian Wu1,Wenzhong Yang2,Yimin Zhang1,*()   

  1. 1. Nanjing Institute of Environmental Science, Ministry of Ecology and Environmental of the People's Republic of China, Nanjing 210042, China
    2. College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210037, China
  • Received:2020-06-11 Online:2020-10-20 Published:2020-10-21
  • Contact: Yimin Zhang E-mail:xubinnies@163.com;zymnies@163.com

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Cd2+的效果,并与RGO电极进行了比较。结果表明,2种电极对Cd2+的电吸附量随工作电压的升高、Cd2+初始浓度的增大而增大,随温度的升高而减小;循环流速对Cd2+的吸附效果影响不明显。RGO/TiO2电极CDI除Cd2+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。

关键词: 电容去离子, 石墨烯, 水处理, Cd2+

Abstract:

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 Cd2+ by electrosorption was investigated and compared with that of RGO electrode. The results showed that the adsorption capacity of Cd2+ of the two electrodes increased with the increase in working voltage and initial concentration of Cd2+, but decreased with the increase in temperature. The effect of circulating flow rate on the adsorption of Cd2+ was not obvious. In addition, the CDI removal performance of Cd2+ for RGO/TiO2 electrode was better than that for RGO electrode. The electrosorption process met the pseudo-first order kinetic model and Freundlich model.

Key words: capacitance deionization, graphene, water treatment, cadmium ion

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