A222型阴离子交换树脂脱除HPP水溶液中SO_4^(2-)的研究  

REMOVAL OF SULFATES FROM HPP AQUEOUS SOLUTION BY A222 ANION EXCHANGE RESINS

作　　者：周宵[1] 池彦菲 陈亚中[1] 崔鹏[1] 左永伟 徐光泽 徐洁书 吴炳智 

机构地区：[1]可控化学与材料化工安徽省重点实验室合肥工业大学化学与化工学院,合肥230009 [2]铜陵有色冶化分公司,铜陵244001

出　　处：《离子交换与吸附》2015年第2期168-177,共10页Ion Exchange and Adsorption

基　　金：安徽省科技攻关项目(08010202124)

摘　　要：论文研究了A222树脂在N,N'-二(2-羟丙基)哌嗪(HPP)脱硫胺液中对SO42-的离子交换性能,优化条件为振荡温度50℃、交换时间2h,HPP浓度0.5mol/L、SO42-浓度0.3mol/L、p H值5.1、固液比80g/L,此条件下,树脂的交换量达163.57mg/g。在HPP-SO42-中,A222树脂具有优良的稳定性和脱盐效果,在循环交换-解吸过程中,对SO42-的平均交换量为136.25mg/g、平均交换率51.37%、平均脱附率96.48%、室温下的动态交换量可达196.90mg/g。FT-IR和TG研究结果表明,HPP能通过物理吸附作用附着在A222树脂上,而树脂对SO42-的离子交换过程中有化学键生成。树脂对SO42-的吸附过程更好地遵循Freundlich等温吸附规律。Exchange capacity of A222 resin for the removal of sulfates from 1,4-Bis-(2-hydroxypropyl)-piperazine(HPP) aqueous solution was studied. The maximum exchange capacity was 163.57mg/g at the optimal conditions(such as reaction temperature 50℃, contact time 2h, HPP concentration 0.5mol/L, sulfates concentration 0.3mol/L, p H 5.1, and solvent-to-resin ratio 80g/L). During the circulation exchange-desorption process in HPP-SO42-, average exchange capacity of sulfates, exchange capacity of sulfates in solution and desorption efficiency from A222 was 136.25mg/g, 51.37% and 96.48%, respectively. Dynamic exchange capacity of sulfates in HPP-SO42- aqueous solution was 196.90mg/g at room temperature. FT-IR and TG analysis of A222 resin indicated the adsorption of HPP on the resins was a physical adsorption with formation of chemical bond. The adsorption of sulfates in HPP aqueous solution on A222 resins could be described well by Freundlich equations.

关 键 词：SO42- A222树脂 离子交换 N N’-二(2-羟丙基)哌嗪 

分 类 号：TQ028.33[化学工程]