Cr(VI) removal by continuous electrodeionization: Study of its basic technologies

被引：53

作者：

Alvarado, L. ^{[1
]}

Ramirez, A. ^{[1
]}

Rodriguez-Torres, I. ^{[1
]}

机构：

[1] UASLP, Inst Met, Fac Ingn, San Luis Potosi 78210, Mexico

来源：

DESALINATION | 2009年 / 249卷 / 01期

关键词：

Hexavalent chromium; Electrodeionization; Ion exchange; Electrodialysis; ION-EXCHANGE; ELECTRO-REGENERATION; HEXAVALENT CHROMIUM; WASTE-WATER; TRANSPORT; SYSTEM; RESIN; CEDI;

D O I：

10.1016/j.desal.2009.06.051

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The capabilities of continuous electrodeionization process (CEDI) and its basic technologies (electrodialysis (ED) and ion exchange (IX)) were analyzed in order to remove hexavalent chromium from synthetic solutions at pH 5. A cell with two chambers (dilute and concentrate) was used. Two cation exchange membranes (CM-1) and one anion exchange membrane (AFN) (40 cm(2) effective area) were employed in the experimental setup. IX technology was single evaluated using an IRA-67 anionic resin to know its independent performance from the other technologies, whereas ED was studied in the cell; I-lim determination was done by I vs. U plots and factors of 0.7 I-lim and 0.85 I-lim were applied to ED process. Finally, ED[process was studied at the same conditions that ED in order to know the resin bed role. During IX the removal reached was 50%; ED 98% after 6.25 h operation with an energy consumption of 1.21 kWh/m(3): ED[(anionic bed) accomplishing 97.55% chromium removal (energy consumption of 0.91 kWh/m(3)). Finally ED[with mixed bed removed 99.8% in 1.3 h and of 0.167 kWh/m(3) of energy consumption. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：423 / 428

页数：6

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