School of Chemistry & Materials Science, Ludong University, Shandong 264025, China.
J Hazard Mater. 2010 Mar 15;175(1-3):1014-21. doi: 10.1016/j.jhazmat.2009.10.111. Epub 2009 Nov 5.
Porous acrylonitrile (AN)/methyl acrylate (MA) copolymer beads were prepared by suspended emulsion polymerization. The cyano groups in AN/MA copolymer beads were converted to amidoxime (AO) groups by reaction with hydroxylamine hydrochloride (NH(2)OH.HCl) to remove metal ions in aqueous solution. The untreated AN/MA and amidoximated AN/MA (AO AN/MA) copolymer beads were characterized by FTIR spectroscopy, SEM, and porous structural analysis. Both mesopores and macropores were presented in AN/MA and AO AN/MA copolymer beads. Qualitative experiments of adsorption were conducted to evaluate modified and unmodified resins on fixing Hg(2+), Ag(+), Cu(2+), Fe(3+) and Pb(2+) from aqueous solution using batch extractions. It was found that AO AN/MA copolymer beads have excellent adsorption capacities for Hg(2+), Ag(+) and Cu(2+), especially for Hg(2+), and it have good selectivity for Hg(2+). The equilibrium was established in 10h through adsorption kinetics study. The Langmuir model was much better than the Freundlich model to describe the isothermal process.
多孔丙烯腈（AN）/甲基丙烯酸甲酯（MA）共聚物珠粒通过悬浮乳液聚合制备。通过与盐酸羟胺（NH（2）OH.HCl）反应，将 AN/MA 共聚物珠粒中的氰基转化为偕胺肟（AO）基团，以去除水溶液中的金属离子。未处理的 AN/MA 和偕胺肟化的 AN/MA（AO AN/MA）共聚物珠粒通过傅里叶变换红外光谱（FTIR）、SEM 和多孔结构分析进行了表征。AN/MA 和 AO AN/MA 共聚物珠粒中均存在中孔和大孔。采用批量萃取法进行了吸附定性实验，以评估改性和未改性树脂从水溶液中固定 Hg（2+）、Ag（+）、Cu（2+）、Fe（3+）和 Pb（2+）的能力。结果表明，AO AN/MA 共聚物珠粒对 Hg（2+）、Ag（+）和 Cu（2+）具有优异的吸附能力，特别是对 Hg（2+）具有良好的选择性。通过吸附动力学研究，在 10 小时内达到平衡。Langmuir 模型比 Freundlich 模型更能描述等温过程。
