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《Bulletin of the Chinese Ceramic Society》 2011-06
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Study on Adsorption of Copper(Ⅱ) by Organic-palygorskite

CHANG Yue1,2,QI Cai-ju1,LU Feng1,YING Chan-juan1,MA Hong-bin1,ZHA Fei1 (1.College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China;2.Key Laboratory of Eco-environment-related Polymer Materials,Ministry of Education,Lanzhou 730070,China)  
The organo-palygorskite was prepared by γ-aminopropyltrimethoxysilane(APS) and quaternary ammonium salt.The sorption property of modified palygorskite for copper(Ⅱ) in water was studied.Comparing to natural palygorskite,adsorption ability of organo-palygorskite is higher in the treatment of copper(Ⅱ).When the temperature was 288 K,the adsorbent amount was 20 mg,the shocking time was 40 min and the pH was 5.5,the maximum sorption capacity was 45.69 mg/g.The kinetic data indicated that the adsorption fitted well with the pseudo-second-order kinetic model.Thermodynamic paramelers calculated shows that the adsorption is a spontaneous and exothermic process.Enthalpy and entropy change of the adsorption of hydroquinone are 36.19 kJ/mol and 130.78 mol·K,respectively.Free energy of the adsorption increases with the increase of temperature.
【Fund】: 2011年国家自然基金项目(No.21161017);; 2010西北师范大学知识与科技创新工程项目(nwnu-kjcxgc-03-63);2010西北师范大学青年教师科研能力提升计划项目(NWNU-lkqn-10-9)
【CateGory Index】: O647.31
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