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 

机构地区：[1]Key Laboratory of Resources and Environment Chemistry of West China, Hexi University, Zhangye 734000, China [2]Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Journal of Environmental Sciences》2010年第1期7-14,共8页环境科学学报（英文版）

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)

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.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.

关 键 词：COMPOSITE Methyl Violet adsorption kinetics ISOTHERM 

分 类 号：O614.121[理学—无机化学] TB33[理学—化学]