亲水性氨基吡啶树脂的合成及其吸附性能

Synthesis and Adsorption Performance of Hydrophilic Aminopyridine Resin

将氨基吡啶功能基引入亲水性大孔球状聚甲基丙烯酸环氧丙酯(PGMA),合成了高亲水性的氨基吡啶螯合树脂(PGMA-AP),考察了该树脂对Hg2+、Pb2+、Cu2+、Ni2+等重金属离子的静态吸附性能及影响因素。结果表明,该树脂对上述4种重金属离子在25℃时的静态饱和吸附容量分别为2.145、1.715、1.023和0.654mmol/g,最佳吸附pH值为4.5～5.0,吸附性能随温度升高而改善,在实验浓度范围内该树脂对上述重金属离子的等温吸附符合Langmuir和Freundlich方程。

A hydrophilic resin with 4-aminopyridine was synthesized by the amination of macroporous glycidyl methacrylate-divinylbenzene copolymer（ PGMA） beads with 4-aminopyridine.Its static adsorption performance and influence factors toward Hg（ Ⅱ） ,Pb（ Ⅱ） ,Cu（ Ⅱ） ,Zn（ Ⅱ） were investigated.At 25 ℃,the static adsorption capacities for Hg（Ⅱ） ,Pb（Ⅱ） ,Cu（Ⅱ） ,Zn（Ⅱ） are 2.145,1.715,1.023 and 0.654 mmol/g, respectively.The optimal pH value for the adsorption is in the range of 4.5～5.0.In addition,the adsorptive properties for the heavy metal ions could be improved with the increase of temperatures.The adsorption isotherms approximately fit the Langmuir and Freundlich equations within the range of experimental concentrations.