PAN基弱碱性离子交换纤维对Zn^2+吸附性能研究  

Adsorption Properties of PAN-based Weakly Basic Ion Exchange Fiber for Zn^2+

作　　者：王娜娜 张翔[3] WANG Nana;ZHANG Xiang(Henan Pingdingshan Ecological Environment Monitoring Center, Pingdingshan Henan 467400, China;Advanced Separation Technology Laboratory, Zhengzhou University, Zhengzhou Henan 450001, China;School of Chemical Engmeering and Energy, Zhengzhou University, Zhengzhou Henan 450001, China)

机构地区：[1]河南省平顶山生态环境监测中心,河南平顶山467400 [2]郑州大学先进分离技术实验室,河南郑州450001 [3]郑州大学化工与能源学院,河南郑州450001

出　　处：《广西师范大学学报（自然科学版）》2020年第5期86-94,共9页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金—河南联合基金(U1804127)。

摘　　要：以腈纶(PAN,polyacylonitrile)为基体制备PAN基弱碱性离子交换纤维,并对其进行表征;探讨溶液pH、反应温度、吸附时间、溶液初始浓度对其吸附Zn^2+性能的影响,考察盐酸浓度、体积对其再生效果的影响及其重复利用性能。结果表明:在pH为2~6,随着pH的增大改性纤维的吸附性能越好;在303 K时,反应60 min吸附达到动态平衡,最大饱和吸附量为155.33 mg/g,温度对其吸附性能影响不大;5 mL 1.2 mol/L的盐酸溶液对其再生效果最好,具有良好的化学稳定性;吸附Zn^2+的过程符合Langmuir等温吸附模型,属于单分子层吸附。In this paper,a kind of PAN-based weak alkaline ion exchange fiber was synthesized and was used as adsorbent for Zn^2+.The effects of pH,temperature,adsorption time and concentration of Zn^2+solution on the adsorption performance of modified fibers were investigated.The optimal concentration and volume of hydrochloric acid for desorption the fiber were discussed.The results showed that the adsorption performance of the modified fiber was better as the pH increases within the range of pH=2~6;The adsorption reached a dynamic equilibrium after 60 min of reaction at 303 K,and the maximum saturated adsorption amount was 155.33 mg/g.The temperature had little effect on the adsorption performance of the fiber.The regeneration of the fiber worked best with 5 mL of 1.2 mol/L hydrochloric acid solution,and the modified fiber had good chemical stability.The process of adsorbing Zn^2+by modified fiber conformed to the Langmuir isotherm adsorption model and belonged to monolayer adsorption.

关 键 词：PAN基 弱碱性离子交换纤维 ZN^2+ 吸附性能 等温吸附模型 

分 类 号：TQ342.84[化学工程—化纤工业]