【摘要】 用 8 羟基喹啉、甲醛、间苯二酚及苯磺酸钠作原料合成了一种螯合树脂。这种树脂在pH为 5时对重金属交换吸附具有很强的选择性 ,其对Cu2 + ,Hg2 + 和Pb2 + 的交换容量分别为 31 8、2 2 4和 2 0 2cmol/kg。在此条件下 ,其对Mg2 + 的交换容量仅为上述金属离子的 1 / 1 0～ 1 / 8。试验证明 ,在pH <5时 ,树脂的H+ 离子和重金属离子的交换比例为 2∶1。因此 ,在树脂态和酸性范围中 ,8 羟基喹啉与金属离子只能形成 1∶1型的螯合物。试验结果表明 ,含 8 羟基喹啉的螯合树脂可用于弱酸性水体中重金属离子的富集与分离分析更多还原

【Abstract】 Formaldehyde 8 hydroxyquinoline sodium benzene sulfonate resorcinol copolymer described as chelating ion exchange resin was synthesized. The resin had a good selectivity to exchangeable adsorption of heavy metal ions under pH5. Among heavy metal ions, the exchange capacity of Cu 2+ , Hg 2+ , and Pb 2+ were 318, 224 and 202 cmol/kg, respectively. And on this condition, the exchange capacity of the resin to Mg 2+ was only 1/10-1/8 of above metals. The experiment showed that the exchange ratio of H + in this resin to heavy metal was 2∶1. Therefore, 1∶1 complex could be formed between 8 hydroxyquinoline and metal ion in resin phase during weak acidity. These properties showed that the chelating ion exchange resin containing 8 hydroxyquinoline may be used to enrich heavy metals in water and their separatable analysis.更多还原