Adsorption of anionic dyes on chitosan grafted poly(alkyl methacrylate)s

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• 作者：Vinod Kumar Konaganti ; Ramanjaneyulu Kota ; Satish Patil ; Giridhar Madras
• 关键词：Adsorption ; Kinetics ; Chitosan ; Chitosan grafting ; Poly(alkyl methacrylate)s
• 刊名：Chemical Engineering Journal
• 出版年：2010
• 出版时间：15 April 2010
• 年：2010
• 卷：158
• 期：3
• 页码：393-401
• 全文大小：786 K

文摘

Chitosan grafted poly(alkyl methacrylate)s (namely chitosan grafted poly(methyl methacrylate) (ChgPMMA), chitosan grafted poly(ethyl methacrylate) (ChgPEMA), chitosan grafted poly(butyl methacrylate) (ChgPBMA) and chitosan grafted poly(hexyl methacrylate) (ChgPHMA)) were synthesized and characterized by using FT-IR and ¹³C NMR techniques. The adsorption batch experiments on these grafted copolymers were conducted by using an anionic sulfonated dye, Orange-G. A pseudo-second-order kinetic model was used to determine the kinetics of adsorption. The effect of grafting, effect of process variables and the effect of different sulfonated anionic dyes (Orange-G, Congo Red, Remazol Brill Blue R and Methyl Blue) on the adsorption kinetics was determined. The Langmuir and Freundlich models were used to fit the adsorption isotherms and from the values of correlation coefficients (R²), it was observed that the experimental data fits very well to the Langmuir model. The values of the maximum adsorption capacity of the adsorbents follow the order: ChgPMMA > ChgPEMA > ChgPBMA > ChgPHMA > chitosan.