SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (4): 646-651.DOI: 10.1016/j.cjche.2014.01.003

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Adsorption of zinc onto anionic ion-exchange resin from cyanide barren solution

Yali Zhang1, Xianjin Yu1, Qinglong Wang1, Zhijun Jiang2, Tao Fang1   

  1. 1 College of Chemical Engineering, Shandong University of Technology, Zibo 255049, China;
    2 Zibo Guoli New Power Source Technology Co., Ltd., Zibo, Shandong 255086, China
  • Received:2013-09-17 Revised:2014-01-18 Online:2015-05-13 Published:2015-04-28
  • Contact: Xianjin Yu
  • Supported by:

    Supported by Shandong provincial Natural Science Foundation,China (ZR2013EEM005),and the High Education Science Technology Program of Shandong Province,China (J12LA04).

Adsorption of zinc onto anionic ion-exchange resin from cyanide barren solution

Yali Zhang1, Xianjin Yu1, Qinglong Wang1, Zhijun Jiang2, Tao Fang1   

  1. 1 College of Chemical Engineering, Shandong University of Technology, Zibo 255049, China;
    2 Zibo Guoli New Power Source Technology Co., Ltd., Zibo, Shandong 255086, China
  • 通讯作者: Xianjin Yu
  • 基金资助:

    Supported by Shandong provincial Natural Science Foundation,China (ZR2013EEM005),and the High Education Science Technology Program of Shandong Province,China (J12LA04).

Abstract: Removal of zinc fromcyanide barren solution is obligatory for its reuse in leach process. Batch experiments were carried out to evaluate the adsorption capacity of resins under different experimental conditions, including concentration, resin amount, initial pH, contact time and temperature. More than 99% of adsorption was achieved under the optimal condition. High adsorption rates on the resin were observed at the beginning and plateau values were obtained in 60 min. The thermodynamic parameters (free energy change ΔG, enthalpy change ΔS and entropy change ΔH) for the adsorption were evaluated. The adsorption kinetic mechanism was studied with four models. The experimental results show that the adsorption follows the Langmuir isotherm and the kinetics follows the pseudo-second-order model.

Key words: Anion-exchange resin, Adsorption isotherms, Adsorption kinetics

摘要: Removal of zinc fromcyanide barren solution is obligatory for its reuse in leach process. Batch experiments were carried out to evaluate the adsorption capacity of resins under different experimental conditions, including concentration, resin amount, initial pH, contact time and temperature. More than 99% of adsorption was achieved under the optimal condition. High adsorption rates on the resin were observed at the beginning and plateau values were obtained in 60 min. The thermodynamic parameters (free energy change ΔG, enthalpy change ΔS and entropy change ΔH) for the adsorption were evaluated. The adsorption kinetic mechanism was studied with four models. The experimental results show that the adsorption follows the Langmuir isotherm and the kinetics follows the pseudo-second-order model.

关键词: Anion-exchange resin, Adsorption isotherms, Adsorption kinetics