The feasibility of boron removal from water by capacitive deionization

被引：79

作者：

Avraham, Eran ^{[1
]}

Noked, Malachi ^{[1
]}

Soffer, Abraham ^{[1
]}

Aurbach, Doron ^{[1
]}

机构：

[1] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 18期

关键词：

Capacitive deionization; Electro-adsorbtion; Boron removal; DESALINATION; NANOFILTRATION;

D O I：

10.1016/j.electacta.2011.05.037

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report on the possibility of removing boron (in the form of boric acid) from water by electrochemical means. We explore capacitive de-ionization (CDI) processes in which local changes in pH near the surface of high-surface-area activated carbon fiber (ACF) electrodes during charging are utilized, in order to dissociate boric acid into borate ions which can be electro-adsorbed onto the positive electrode in the CDI cells. For this purpose, a special flow-through CDI cell was constructed in which the feed solution flows through the electrodes. Local pH changes near the carbon electrode surface were investigated using a MgCl2 solution probe in three- (with reference) and two-electrode cells, and described qualitatively. We show that, to a certain extent, boron can indeed be removed from water by CDI. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：6312 / 6317

页数：6

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