聚丙烯酸弱酸性阳离子交换树脂对铕的吸附性能及机理  

SORPTION BEHAVIOR AND MECHANISM OF MACROPOROUS POLYACRYLIC ACID RESIN FOR EUROPIUM ION

作　　者：陈义镛[1] 陈宇红 王耐冬[1] 

机构地区：[1]杭州大学化学系,杭州310028

出　　处：《离子交换与吸附》1992年第3期200-204,共5页Ion Exchange and Adsorption

基　　金：国家自然科学基金

摘　　要：测定了弱酸性阳离子交换树脂对Eu^(3+)的交换容量(358.2mgEu^(3+)/g树脂),介质pH、温度、吸附时间等因素对吸附的影响。测得吸附速率常数K_(25℃)—1.66×10^(-3)S^(-1)、K_(28℃)—2.06×10^(-3)S^(-1)、K_(32℃)=2.44×10^(-3)S^(-1)。探讨了吸附机理。在不同浓度比范围,吸附过程中树脂功能基与Eu^(3+)的吸附摩尔比,[COOH]/[EU^(3+)],分别近于1、2、3。The influences of medium pH, sorption temperature, sorption time, etc. on the sorption capacity of weak acid type macroporous polyacrylic acid cation exchange resin for Eu3+ were determined. The sorption rate contents are K25℃= 1. BB×10-3s-1, K28℃= 2. 06×10-3s-1, and K32℃ = 2. 44×10-3, respectively. The molar ratios of sorption, [COOH]/[Eu3+], over a different concentration range are nearly 1,2,3, respectively. The sorption mechanism of polyacrylic acid resin for Eu3+ was studies.

关 键 词：铕 吸附 聚丙烯酸树脂 

分 类 号：O614.338[理学—无机化学]