胺基化改性D301树脂对AuCl4－的吸附及识别性能∗

摘要

以 D301树脂为载体,先接枝聚甲基丙烯酸缩水甘油酯再用乙二胺进行改性,制得胺基化改性树脂D301-g-APGMA.对D301-g-APGMA进行了FTIR及XPS表征,并考察了 D301-g-APGMA 对 AuCl4－的吸附性能及识别选择性能.研究结果显示,D301-g-APGMA对AuCl4－表现出了优良的吸附性能和识别选择能力,在25℃、pH 值为2的条件下,静态吸附量可以达到276．74 mg/g；相对于 Cu2＋与 Fe3＋,选择性系数分别为713,374.此外,D301-g-APGMA具有优良的再生与重复使用性能.%The amino modified D301 resin,D301-g-APGMA,was obtained using D301 resin as the carrier, polyglycidyl methacrylate as functional polymer and ethylenediamine as modifier.D301-g-APGMA were charac-terized by FT-IR and XPS methods.Its adsorption performance and recognition selectivity performance for AuCl4 - were also investigated.The results showed that D301-g-APGMA exhibited excellent adsorption proper-ties and recognition selectivity for AuCl4 -.The static adsorption capacity can reach to 276.74 mg/g at 25 ℃ and pH of 2.The relative selectivity coefficients relative to Cu2+ and Fe3+ are 713 and 374,respectively.Additional, D301-g-APGMA possesses excellent reproducibility and reusability.