氰化贫液中用阴离子交换树脂吸附锌的研究英文张亚莉.pdf

Chinese Journal of Chemical Engineering 23 (2015) 646–651 Contents lists available at ScienceDirect Chinese Journal of Chemical Engineering journa l h omepage: /locate/CJChE Separation Science and Engineering Adsorption of zinc onto anionic ion-exchange resin from cyanide ☆ barren solution Yali Zhang 1, Xianjin Yu 1,⁎, Qinglong Wang 1, Zhijun Jiang 2, Tao Fang 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 a r t i c l e i n f o a b s t r a c t Article history: Removal of zinc from cyanide barren solution is obligatory for its reuse in leach process. Batch experiments were Received 17 September 2013 carried out to evaluate the adsorption capacity of resins under different experimental conditions, including con- Received in revised form 5 January 2014 centration, resin amount, initial pH, contact time and temperature. More than 99% of adsorption was achieved Accepted 18 January 2014 under the optimal condition. High adsorption rates on the resin were observed at the beginning and plateau Available online 10 February 2015 values were obtained in 60 min. The thermodynamic parameters (free energy change ΔG, enthalpy change ΔS Keywords: and entropy change ΔH ) for the adsorption were evaluated. The adsorption kinetic mechanism was studied Anion-exchange resin