The feasibility of boron removal from water by capacitive deionization

Eran Avraham; Malachi Noked; Abraham Soffer; Doron Aurbach

doi:https://doi.org/10.1016/j.electacta.2011.05.037

The feasibility of boron removal from water by capacitive deionization

Eran Avraham, Malachi Noked, Abraham Soffer, Doron Aurbach

Department of Chemistry

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	6312-6317
Number of pages	6
Journal	Electrochimica Acta
Volume	56
Issue number	18
DOIs	https://doi.org/10.1016/j.electacta.2011.05.037
State	Published - 15 Jul 2011

Keywords

Boron removal
Capacitive deionization
Electro-adsorbtion

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Electrochemistry

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https://doi.org/10.1016/j.electacta.2011.05.037

Cite this

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title = "The feasibility of boron removal from water by capacitive deionization",

abstract = "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.",

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TY - JOUR

T1 - The feasibility of boron removal from water by capacitive deionization

AU - Avraham, Eran

AU - Noked, Malachi

AU - Soffer, Abraham

AU - Aurbach, Doron

PY - 2011/7/15

Y1 - 2011/7/15

N2 - 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.

AB - 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.

KW - Boron removal

KW - Capacitive deionization

KW - Electro-adsorbtion

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U2 - https://doi.org/10.1016/j.electacta.2011.05.037

DO - https://doi.org/10.1016/j.electacta.2011.05.037

M3 - مقالة

SN - 0013-4686

VL - 56

SP - 6312

EP - 6317

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 18

ER -

The feasibility of boron removal from water by capacitive deionization

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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