亚胺基二乙酸树脂吸附铈(Ш)的研究  

Cerium(Ш) sorption with diglycolamidic acid resin

作　　者：施林妹[1] 莫建军[2] 

机构地区：[1]丽水职业技术学院环境工程分院,浙江丽水323000 [2]丽水学院化学系,浙江丽水323000

出　　处：《化学工程》2008年第1期5-8,共4页Chemical Engineering(China)

基　　金：浙江省教育厅资助项目(20040551);浙江省教育厅项目(20031146)

摘　　要：用树脂吸附的方法研究了铈的富集及回收。测定了在不同介质pH值、温度、吸附时间等因数对吸附的影响。结果表明:亚胺基二乙酸树脂在pH=6.00的HAc-NaAc体系中吸附最佳,静态饱和吸附容量为173 mg/g;吸附速率常数k298=1.00×10-4s-1,吸附活化能ΔEa=10.9 kJ/mol;用0.1—2.0 mol/L HCl可定量洗脱;吸附等温线符合Freundlich经验式;树脂功能基与铈的配位摩尔比为3∶1;用化学和红外光谱的方法探讨了吸附机理。Focusing on the research of enrichment and recovery of cerium by resin adsorption method. The effect of the factors such as pH value of medium, temperature, adsorption time, etc., on sorption was measured. Experimental results showed that diglyeolamidie acid resin had a good adsorptivity for Ce^3＋ in the HAc-NaAc medium when pH = 6.00. The statically saturated Ce^3＋ sorption capacity was 173 mg/g; the sorption rate constant was k298 = 1.00×10^-4s^-1. The activation energy was △Ea = 10.9 kJ/mol. The Ce^3＋ adsorbed on diglyeolamidie acid resin could be stripped quantitatively by using 0.1-2.0 mol/L HC1. The adsorption behavior of diglyeolamidie acid resin for Ce^3＋ obeyed the Freundlieh isotherm. The molar coordination ratio of the functional group of diglyeolamidie acid resin to Ce^3 ＋ was 3 ： 1. The adsorption mechanism of resin for Ce^3 ＋ was examined by chemical analysis and IR spectra.

关 键 词：亚胺基二乙酸树脂 铈 吸附 机理 

分 类 号：O647.31[理学—物理化学]