Adsorption properties of amidoximated porous acrylonitrile/methyl acrylate copolymer beads for Ag (I)

作者：Liu, Xin; Chen, Hou^*; Wang, Chunhua; Qu, Rongjun; Ji, Chunnuan; Sun, Changmei; Xu, Qiang

来源：Polymers for Advanced Technologies, 2011, 22(12): 2032-2038.

DOI：10.1002/pat.1714

• acrylonitrile
• adsorption
• Ag (I)
• amidoxime
• suspended emulsion polymerization

Porous a crylonitrile (AN)/methyl acrylate (MA) copolymer beads were synthesized by suspended emulsion polymerization and amidoximated for the purpose of Ag+ adsorption. Optimum amidoximation temperature and time were determined by following the adsorption capacity for Ag+. The results showed that amidoximated AN/MA (AO AN/MA) with the amidoximation temperature 70 degrees C and amidoximation time 20 hr had a relatively higher adsorption capacity for Ag+. The effect of pH on adsorption for Ag+ was studied; the highest adsorption capacity presented at pH 5.0. Adsorption kinetics and isotherms of AO AN/MA copolymer beads for Ag+ were also investigated. The kinetics data indicated that the adsorption process was governed by the film diffusion and followed both pseudo-first-order and pseudo-second-order rate model. The isotherms indicated that adsorption capacities increased with equilibrium concentration and temperature. The Langmuir model and Sips model could describe the isothermal process. Thermodynamic analysis revealed that the adsorption behaviors of Ag+ ions on AO AN/MA could be considered as endothermic and physical sorption process.

• 出版日期2011-12
• 单位鲁东大学