Removal of anionic dyes from aqueous solutions by adsorption of chitosan-based semi-IPN hydrogel composites

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• 作者：Sanping Zhao ; ^{zhaosanping@163.com} ; Feng Zhou ; Liyan Li ; Mengjie Cao ; Danying Zuo ; Hongtao Liu
• 关键词：A. Polymer&ndash ; matrix composites (PMCs) ; B. Physical properties ; Adsorption profiles
• 刊名：Composites Part B: Engineering
• 出版年：2012
• 出版时间：April, 2012
• 年：2012
• 卷：43
• 期：3
• 页码：1570-1578
• 全文大小：508 K

文摘

Semi-IPN hydrogel composites for dye adsorption studies were prepared via photopolymerization of poly(ethylene glycol) (PEG) macromer and acrylamide (AAm) monomer in the presence of chitosan (CS). Swelling properties and kinetics of the hydrogel composites were investigated in aqueous solution and Acid Red 18 (AR 18) solution. The adsorption studies showed that the adsorption capacity for AR 18 increased with the increase of initial dye concentration and chitosan content in the hydrogels, but decreased with the increase of pH and ionic strength of dye solutions. Absorption kinetics of AR 18 followed pseudo second-order kinetic model at pH 2.0. The adsorption capacities for Acid Orange 7 (AO 7), Methyl Orange (MO) and Basic Violet 14 (BV 14) were also examined at pH 2.0, and the equilibrium adsorption data of AR 18, AO 7 and MO well fitted the Langmuir isotherm. The hydrogel composites could be potentially used as absorbents for anionic dye removal in wastewater treatment process.