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过程工程学报 ›› 2017, Vol. 17 ›› Issue (5): 1085-1090.DOI: 10.12034/j.issn.1009-606X.217104

• 材料工程 • 上一篇    下一篇

石墨烯的制备及其对铬(VI)的吸附性能

郑志功1*,杨金杯2, 郭锦超2,史荣会1   

  1. 1. 福建工程学院生态环境与城市建设学院,福建 福州 350108;2. 福建师范大学福清分校,福建 福州 350300
  • 收稿日期:2016-12-06 修回日期:2017-03-01 出版日期:2017-10-20 发布日期:2017-10-10
  • 通讯作者: 郑志功
  • 基金资助:
    福建省教育厅科研资助项目

Preparation of Graphene and its Application on the Adsorption of Cr(VI)

Zhigong ZHENG1*,  Jinbei YANG2,  Jinchao GUO2,  Ronghui SHI1     

  1. 1. College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350108, China; 2. Fuqing Branch, Fujian Normal University, Fuzhou, Fujian 350300, China
  • Received:2016-12-06 Revised:2017-03-01 Online:2017-10-20 Published:2017-10-10

摘要: 采用氧化还原法制备石墨烯,研究其对水中铬(VI)的吸附性能,考察了溶液初始pH值、吸附温度、石墨烯用量等对吸附效果的影响及吸附热力学和动力学性能. 结果表明,石墨烯是一种良好的吸附铬(VI)的吸附剂,吸附过程可用Langmuir等温吸附模型较好地描述,为优惠吸附,是自发吸热过程,符合拟二级吸附动力学模型,吸附活化能为88.62 kJ/mol.

关键词: 石墨烯, 铬(VI), 吸附, 热力学, 动力学

Abstract: Graphene was prepared by graphite oxide reduction method. Graphene was used to remove Cr(VI) from water as an absorbent. Effects of pH, temperature and graphene dosage on the adsorption capacity, adsorption thermodynamics and kinetics were discussed. The results showed that graphen was a good adsorbent of Cr(VI). The adsorption behavior was the favourable adsorption, conformed the Langmuir isotherm equation well. The adsorption process was spontaneous and endothermic process, it corresponded with pseudo-secong-order kinetic model, the activation energy was 88.62 kJ/mol.

Key words: graphene, Cr(VI), adsorption, thermodynamics, dynamics