SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (1): 94-100.DOI: 10.1016/j.cjche.2015.06.017

• 第25届中国过程控制会议专栏 • 上一篇    下一篇

Equilibrium and kinetics of copper ions removal from wastewater by ion exchange

P.C.C. Siu1, L.F. Koong1, J. Saleem1, J. Barford1, G.McKay1,2   

  1. 1 Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;
    2 Division of Sustainable Development, College of Science, Engineering and Technology, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
  • 收稿日期:2014-10-13 修回日期:2015-06-09 出版日期:2016-01-28 发布日期:2016-02-23
  • 通讯作者: G.McKay

Equilibrium and kinetics of copper ions removal from wastewater by ion exchange

P.C.C. Siu1, L.F. Koong1, J. Saleem1, J. Barford1, G.McKay1,2   

  1. 1 Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China;
    2 Division of Sustainable Development, College of Science, Engineering and Technology, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
  • Received:2014-10-13 Revised:2015-06-09 Online:2016-01-28 Published:2016-02-23
  • Contact: G.McKay

摘要: The removal of copper ions from wastewater by ion exchange has been studied using an iminodiacetate resin. The capacity of the resin for the copper ions has been determined to be 2.30 mmol·g-1 by measuring the equilibrium isotherm at 25 ℃ and initial pH value of 3.5 where the final equilibrium pH value is 5. An analysis of equilibrium isotherm models showed that the best fit model was the Langmuir-Freundlich. The kinetics of the ion exchange process have been investigated and four kinetic models have been tested namely: Ritchie model, pseudo-second order model, pseudo-first order model and the Elovich model. The pseudo-second order model provides the best fit to the kinetic data.

关键词: Freundlich isotherm, Iminodiacetate resin, Kinetic modeling, Langmuir isotherm, Langmuir-Freundlich isotherm

Abstract: The removal of copper ions from wastewater by ion exchange has been studied using an iminodiacetate resin. The capacity of the resin for the copper ions has been determined to be 2.30 mmol·g-1 by measuring the equilibrium isotherm at 25 ℃ and initial pH value of 3.5 where the final equilibrium pH value is 5. An analysis of equilibrium isotherm models showed that the best fit model was the Langmuir-Freundlich. The kinetics of the ion exchange process have been investigated and four kinetic models have been tested namely: Ritchie model, pseudo-second order model, pseudo-first order model and the Elovich model. The pseudo-second order model provides the best fit to the kinetic data.

Key words: Freundlich isotherm, Iminodiacetate resin, Kinetic modeling, Langmuir isotherm, Langmuir-Freundlich isotherm