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纳滤和电渗析对浓海水一二价离子的分离性能

  • 陈静 张杰 金艳 孙玉柱 宋兴福 于建国
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  • 华东理工大学国家盐湖资源综合利用工程技术研究中心,上海 200237

收稿日期: 2016-09-13

  修回日期: 2016-12-04

  网络出版日期: 2017-06-14

基金资助

国家科技支撑项目;国家重点研发计划

Nanofiltration and Electrodialysis on Separation of Monovalent and Divalent Ions from Concentrated Seawater

  • Jing CHEN Jie ZHANG Yan JIN Yuzhu SUN Xingfu SONG Jianguo YU
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  • National Engineering Research Center for Integrated Utilization of Salk Lake Resource, East China University of Science and Technology, Shanghai 200237, China

Received date: 2016-09-13

  Revised date: 2016-12-04

  Online published: 2017-06-14

摘要

采用纳滤及一价选择性离子交换膜电渗析2种方法对模拟浓海水进行分离浓缩,探索一、二价离子(Na+/Mg2+, Cl-/SO42-)的分离效果. 实验表明,DL2540膜对二价离子的截留性能优于NF270膜,在2.1 MPa压力、浓侧流量为300 L/h的条件下,对Mg2+SO42-的截留率分别达98.1%80.5%,分离因子为2.540.0. 一价离子选择性电渗析膜对阴离子Cl-SO42-的分离效果明显好于阳离子Na+Mg2+Na+回收率为90%时,选择性迁移比分别为18.42.9. 纳滤和选择性电渗析对一、二价离子都有较好的分离效果,电渗析离子分离的同时可实现浓缩,而纳滤对一价离子几乎无浓缩效果.

本文引用格式

陈静 张杰 金艳 孙玉柱 宋兴福 于建国 . 纳滤和电渗析对浓海水一二价离子的分离性能[J]. 过程工程学报, 2017 , 17(3) : 491 -499 . DOI: 10.12034/j.issn.1009-606X.216298

Abstract

Electrodialysis (ED) and nanofiltration (NF) were adopted to separate monovalent and divalent ions (Na+/Mg2+, Cl-/SO42-). The results showed that DL2540 had a better separation efficiency for the rejection of divalent ions than NF270. The rejection of Mg2+ and SO42- were 98.1% and 80.5%, respectively. For ED, the separation factors were 2.5 and 40.0. The separation performance of Cl-/SO42- was better than that of Na+/Mg2+, the separation factors were 18.4 and 2.9 under 90% recover rate of Na+. Both methods had good separation effects of monovalent and divalent ions. ED could also realize ions concentration, while NF could not.

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