Optimization of salt adsorption rate in membrane capacitive deionization

被引：291

作者：

Zhao, R. ^{[1
,2
]}

Satpradit, O. ^{[2
]}

Rijnaarts, H. H. M. ^{[1
]}

Biesheuvel, P. M. ^{[1
,2
]}

van der Wal, A. ^{[1
]}

机构：

[1] Wageningen Univ, Dept Environm Technol, NL-6708 WG Wageningen, Netherlands

[2] Wetsus, Ctr Excellence Sustainable Water Technol, NL-8934 CJ Leeuwarden, Netherlands

来源：

WATER RESEARCH | 2013年 / 47卷 / 05期

关键词：

Membrane capacitive deionization; Ion exchange membrane; Desalination; Water recovery; Salt adsorption rate; Porous electrode model; Constant current operation; Constant voltage operation; ION-EXCHANGE MEMBRANES; POROUS-ELECTRODES; WATER DESALINATION; BRACKISH-WATER; TRANSPORT-PROPERTIES; CARBON; ELECTROCHEMISTRY; PERFORMANCE; EFFICIENCY; ANIONS;

D O I：

10.1016/j.watres.2013.01.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Membrane capacitive deionization (MCDI) is a water desalination technique based on applying a cell voltage between two oppositely placed porous electrodes sandwiching a spacer channel that transports the water to be desalinated. In MCDI, ion-exchange membranes are positioned in front of each porous electrode to prevent co-ions from leaving the electrode region during ion adsorption, thereby enhancing the salt adsorption capacity. MCDI can be operated at constant cell voltage (CV), or at a constant electrical current (CC). In this paper, we present both experimental and theoretical results for desalination capacity and rate in MCDI (both in the CV- and the CC-mode) as function of adsorption/desorption time, salt feed concentration, electrical current, and cell voltage. We demonstrate how by varying each parameter individually, it is possible to systematically optimize the parameter settings of a given system to achieve the highest average salt adsorption rate and water recovery. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1941 / 1952

页数：12

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