功能高分子亚氨基二乙酸树脂对钕的吸附行为研究  

STUDIES ON THE BEHAVIORS OF ADSORPTION OF Nd (Ⅲ) ONTO THE FUNCTIONAL POLYMER-IMINODIACETIC ACID RESIN

作　　者：王永江[1] 熊春华[2] 吴香梅[1] 朱炳林[3] 

机构地区：[1]丽水师范专科学校化学系,浙江丽水323000 [2]杭州商学院食品,生物技术和环境工程学院 [3]北京理工大学化学系

出　　处：《兵工学报》2004年第2期200-203,共4页Acta Armamentarii

基　　金：浙江省自然科学基金 ( 2 0 0 0 72 )

摘　　要：本文用亚氨基二乙酸树脂 (D4 0 1)采用静态的方法吸附钕 (Ⅲ ) ,获得一些参数以指导实际应用。结果 pH =5 73为最佳吸附pH ;2 98K时每克树脂的静态饱和吸附容量 179mg ;用 2 0mol·L- 1HCl解吸 ,解析率达 10 0 % ;等温吸附服从Freundlich经验式 ;2 98K时的表观速率常数k2 98=2 2 2× 10 - 5s- 1;吸附反应的焓变为ΔaHm=18 8kJ·mol- 1;D4 0 1对钕 (Ⅲ )吸附反应的表观吸附活化能为 5 1 3kJ·mol- 1;树脂功能基与钕 (Ⅲ )的配位比为 3∶1;用红外光谱探讨了该树脂和钕 (Ⅲ )Nd (Ⅲ) is statically adsorbed by iminodiacetic acid resin (D401) and some parameters which can be of pratical use are obtained. The best pH value for adsorption in a medium of HAc-NaAc is pH=5.73. The statically saturated adsorption capacity per gram resin at 298K is 179mg .Nd(Ⅲ) adsorbed on D401 can be eluted with 2.0mol·L -1 HCl, with an elution percentage of 100%.The adsorption behavior of D401 for Nd(Ⅲ) obeys the Freundlich isotherm equation .The adsorption rate constant at 298K is k 298= 2.22×10 -5s -1.The adsorption entropy change of D401 for Nd(Ⅲ) is 18.8kJ·mol -1.The apparent adsorption activation energy of D401 for Nd(Ⅲ) is 51.3 kJ·mol -1.The coordination molar ratio of the functional group of D401 to Nd(Ⅲ) is 3:1. Formation of chemical bond between D401 and Nd(Ⅲ) has been discussed applying IR spectrometry.

关 键 词：吸附 亚氨基二乙酸树脂 高分子化学 钕 

分 类 号：TQ425.23[化学工程] O614.335[理学—无机化学]