苯并咪唑螯合树脂的性能与结构表征

The properties and structural characterization of benzimidazole chelate resin

研究以环氧聚合物为基质的苯并咪唑螯合树脂的结构性能以及配位机制。已合成含有BBPAH的新型螯合树脂,测定其在pH0～6.0的缓冲溶液中对Cu2+、Ni2+、Zn2+、Cd2+和Co2+的配位容量。实验结果表明,在pH0～2.0条件下对Cu2+、Zn2+、Cd2+的配位容量分别为0.84、1.65、0.84mmol/g,显示出很高的配位选择性。对络合Cu2+树脂进行了EPR表征和配位场的研究,初步证明为四面体配位结构。同时对苯并咪唑螯合树脂在强酸条件下吸附金属离子的机制进行了探讨。

The study of structure, properties and mechanism of complexation on bis （benzimi-dazole） chelate resin based on epoxide polymer was described in the paper. The new chelate resin containing BBPAH has been synthesized. The coordination capacity of the new resin for Cu^2 ＋ , Ni^2 ＋ , Zn^2 ＋ , Cd^2 ＋ , Co^2 ＋ was determined in a buffer solution with a pH value of 0 - 6.0. The experimental results indicated that the coordination capacity for Cu^2＋ ,Zn^2＋ , Co^2＋ was 0.84 mmol/g, 1.65 mmol/g and 0.84 mmol/g,respecfively, at a pH value in the range of 0- 2.0. The Cu^2 ＋ -loaded chelate resin was characterized by EPR spectra and its coordination field was studied, which preliminarily verified that its coordination structure was proved to be a tetrahedron, The mechanism of complexafion between metal ions and benzimidazole chelating resin in strong acid was also discussed.