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研究氨基膦酸树脂吸附Eu3 + 的性能及其机理。溶液体系采用HAc -NaAc缓冲溶液 ,解吸剂采用 2 0mol·L- 1 的HCl溶液。结果表明 :氨基膦酸树脂对Eu3 + 的吸附在pH =5 7时最佳 ,2 5℃时静态饱和吸附容量为 2 48mg/g树脂 ;用 2 0mol·L- 1HCl解吸率为 89 3 % ;等温吸附服从Freundlich经验式 ;吸附的热焓为ΔH0 =41 0kJ·mol- 1 ,APAR对Eu3 + 的表观吸附活化能为2 3 3kJ·mol- 1 ;树脂功能基与Eu3 + 的配位比为 2∶1。用化学法和红外光谱等探讨了吸附机理 ,树脂功能基中的N原子与O原子与Eu3 + 配位成键形成配合物。用氨基膦酸树脂吸附Eu3 + 是可行的
Study on the Property and Mechanism of Amino Phosphonic Acid Resin Adsorbing Eu3 +. Solution system using HAc -NaAc buffer solution, desorbent solution with 20mol · L-1 HCl. The results showed that the adsorption of Eu3 + on aminophosphonic acid resin was the best at pH = 5 7, the adsorption capacity was 248 mg / g at 25 ℃, the desorption rate was 89 3% with 20mol·L-1 HCl. The isotherm adsorption obeys Freundlich empirical formula; the enthalpy of adsorption is ΔH0 = 41 0 kJ · mol-1; the apparent activation energy of APAR to Eu3 + is 2 3 3 kJ · mol-1; the coordination number of resin functional group to Eu3 + 2: 1. The adsorption mechanism was discussed by chemical methods and infrared spectroscopy. The N atom and O atom in the functional group of the resin were coordinated with Eu3 + to form a complex. Adsorption of Eu3 + with aminophosphonic acid resin is feasible