Multi-ion migration of Ca2+, Mg2+, Na+ and K+ in the CREDI process

被引：2

作者：

Zhang, Yonggang ^{[1
]}

Xu, Jiajun ^{[1
]}

Yang, Guang ^{[1
]}

机构：

[1] Tianjin Polytech Univ, Sch Environm & Chem Engn, 399 Binshui West Rd, Tianjin, Peoples R China

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2016年 / 51卷 / 07期

关键词：

Desalination; electrodeionisation; hardness ion; ion exchangeion migration; CONTINUOUS ELECTRODEIONIZATION CEDI; ION-EXCHANGE; WASTE-WATER; REVERSE-OSMOSIS; CURRENT-DENSITY; METAL-IONS; REMOVAL; ELECTRODIALYSIS; EDI; PURIFICATION;

D O I：

10.1080/01496395.2016.1147466

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, the migration of Ca2+, Mg2+, Na+ and K+ in cation-bed electrodeionisation was studied. The results showed that it was longer for divalent cations to be balanced compared with monovalent cations. At relatively low current densities, the membrane fluxes of monovalent cations were higher than that of divalent cations, whereas the results were reversed at relatively high current densities. In the resin phase, it was observed that the ionic transport was in relation to various hydration ionic radii. The reaction orders for Ca2+, Mg2+, Na+ and K+ were 2, 2, 1 and 1.5, respectively.

引用

页码：1210 / 1219

页数：10

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