纳滤和电渗析对浓海水一二价离子的分离性能

doi:10.12034/j.issn.1009-606X.216298

过程工程学报 ›› 2017, Vol. 17 ›› Issue (3): 491-499.DOI: 10.12034/j.issn.1009-606X.216298

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

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 出版日期:2017-06-20 发布日期:2017-06-14
通讯作者: 孙玉柱宋兴福 janejiny@126.com
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

National Engineering Research Center for Integrated Utilization of Salk Lake Resource, East China University of Science and Technology, Shanghai 200237, China

Received:2016-09-13 Revised:2016-12-04 Online:2017-06-20 Published:2017-06-14

摘要/Abstract

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⁺和SO₄²^-的截留率分别达98.1%和80.5%，分离因子为2.5和40.0. 一价离子选择性电渗析膜对阴离子Cl^-和SO₄²^-的分离效果明显好于阳离子Na⁺和Mg²⁺，Na⁺回收率为90%时，选择性迁移比分别为 18.4和2.9. 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.

关键词: 浓海水, 制盐, 电渗析, 纳滤, 一二价分离

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.

Key words: Concentrated seawater, salt making, ED, NF, separation of monovalence and divalent ions

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.

Jing CHEN Jie ZHANG Yan JIN Yuzhu SUN Xingfu SONG Jianguo YU. Nanofiltration and Electrodialysis on Separation of Monovalent and Divalent Ions from Concentrated Seawater[J]. Chin. J. Process Eng., 2017, 17(3): 491-499.

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纳滤和电渗析对浓海水一二价离子的分离性能

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

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