Removal of Methyl Violet from aqueous solutions using poly (acrylic acid-co-acrylamide)/attapulgite composite

作     者：YongshengWang Li Zeng Xuefeng Ren Hai Song Aiqin Wang 

作者机构：Key Laboratory of Resources and Environment Chemistry of West China Hexi University Zhangye 734000 China Center of Eco-Material and Green Chemistry Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2010年第22卷第1期

页      面：7-14页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the Western Action Project of Chinese Academy of Science (No.KGCX2-YW-501) the Taihu Project of Jiangsu Provincial Science and Technology Office (No.BS2007118,BE2008087) the Key Laboratory of Resources and Environment Chemistry of West China,Hexi University(No.XZ0606) 

主　　题：composite Methyl Violet adsorption kinetics isotherm 

摘      要：The adsorption of Methyl Violet （MV） cationic dye from aqueous solution was carried out by using crosslinked poly （acrylic acid-coacrylamide）/attapulgite （Poly（AA-co-AM）/ATP） composite as adsorbent. The factors influencing adsorption capacity of the composite such as pH, concentration of the dye, temperature, contact time, adsorbent dosage, ionic strength and surfactant were systematically investigated. The equilibrium data fitted very well to the Langmuir isotherm and the maximum adsorption capacity reached 1194 mg/g at 30℃. The thermodynamic parameters including △G0, △H0 and △S0 for the adsorption processes of MV on the composite were also calculated, and the negative △H0 and △G0 confirmed that the adsorption process was exothermicand spontaneous. The kinetic studies showed that the adsorption process was consistent with the pseudo second-order kinetic model and the desorption studies revealed that the regeneration of the composite adsorbent can be easily achieved.