脂肪磺酸基阳离子交换树脂对Cr3＋的吸附和解吸性能  

Adsorption and Desorption Properties of Aliphatic Sulfonic Acid Cationic Exchange Resin for Cr^(3+)

作　　者：李响[1] 魏荣卿[1] 刘晓宁[1] 周渊[1] 陈晓 张利民[3] 

机构地区：[1]南京工业大学制药与生命科学学院,江苏南京210009 [2]南京麦科菲高效分离载体有限公司,江苏南京211000 [3]江苏省环境科学研究院,江苏南京210029

出　　处：《化工环保》2008年第3期201-204,共4页Environmental Protection of Chemical Industry

基　　金：科技部“十一五国家科技支撑计划”基金资助项目(2006BAK03A06);江苏省环保厅环保科技资金资助项目(2006004)

摘　　要：研究了脂肪磺酸基阳离子交换树脂(简称树脂)对Cr3+的吸附和解吸性能。在溶液初始Cr3+质量浓度为250mg/L、吸附温度为25℃、溶液pH为5的条件下,树脂对Cr3+的吸附量最大。Cr3+质量浓度在实验范围内,等温吸附过程均符合Langmuir和Freundlich方程,最大吸附量为18.6208mg/g。树脂对Cr3+的吸附在吸附时间为180min时趋于平衡,且吸附为液膜扩散控制。随吸附温度的升高(10～55℃),树脂对Cr3+的吸附量略有增加。用质量分数为5%的HCl溶液可将吸附在树脂上的Cr3+解吸,解吸率近100%,且重复5次吸附和解吸过程,树脂对Cr3+的吸附量基本保持不变。The adsorption and desorption properties of aliphatic sulfonie acid cationic exhange resin for Cr3＋ was studied. When the initial mass concentration of Cr3＋ is 250 mg/L, the adsorption temperature is 25℃ and the solution pH is 5, its adsorption capacity for Cr3＋ is the highest （ 18. 6208 mg/g）. The adsorption isotherms approximately fit Langmuir and Freundlich equations within the range of experimental concentrations. The adsorption process is liquid film controlling mechanism and after 180 min the process is in equilibrium. Between 10 - 55 ℃, temperature has less effect on its adsorption capacity. Adsorbed Cr3＋ can be desorbed using 5% HCl with nearly 100% of desorption rate. The adsorption capacity of the resin can not keep change after reuse for 5 times.

关 键 词：阳离子交换树脂 铬离子 吸附动力学 解吸 

分 类 号：TQ050.4[化学工程]