论文部分内容阅读
亚氨基二乙酸树脂 (D4 0 1)对铕 ( )的吸附在 HAc- Na Ac缓冲溶液 p H=5 .73时最佳 ,2 5℃时静态饱和吸附容量为 182 m g/g;用 2 .0 m ol· L- 1 HCl作解析剂解吸率为 10 0 % ;等温吸附服从 Freundlich经验式 ;表观速率常数 k2 98=2 .5 4× 10 - 5s- 1 ;吸附的热焓为△ H°=76 .6 k J· mol- 1 ;树脂功能基与铕 ( )的摩尔比为 3∶ 1;用化学法和红外光谱等探讨了吸附机理。
Adsorption of europium (Ⅱ) by iminodiacetic acid resin (D4 0 1) was the best at p H = 5 .73 in HAc-Na Ac buffer solution, and the static adsorption capacity was 182 mg / g at 25 ℃. The desorption rate of 10 mol% L-1 HCl was 10%. The isotherm adsorption obeys Freundlich empirical formula. The apparent rate constant k2 98 = 2.54 × 10 -5s-1. The enthalpy of adsorption is △ H ° = 76.6 kJ · mol-1; the molar ratio of functional groups to europium (3) was 3: 1; and the adsorption mechanism was discussed by chemical methods and infrared spectroscopy.