Reduction of hexavalent chromium by copper

被引：31

作者：

Goeringer, S ^{[1
]}

de Tacconi, NR ^{[1
]}

Chenthamarakshan, CR ^{[1
]}

Rajeshwar, K ^{[1
]}

机构：

[1] Univ Texas, Dept Chem & Biochem, Arlington, TX 76019 USA

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2000年 / 30卷 / 08期

关键词：

environmental remediation; first-order kinetics; mass transport; medium pH;

D O I：

10.1023/A:1004038909149

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The galvanic reaction of metallic copper in Cr(VI)-laden aqueous solutions of varying pH was examined by in situ u.v.-visible spectrophotometry, rotating disc electrode chronopotentiometry and cyclic voltammetry. The galvanic reaction in 0.2 M H2SO4 solutions was pseudo first order in Cr(VI) concentration. Experiments with both magnetically stirred solutions and a copper mesh or a copper film in a rotating disc electrode configuration revealed the reaction to be diffusion-controlled with respect to Cr(VI) transport to the copper surface. Finally, cyclic voltammetry data in Cr(VI)-laden media of varying pH underline the important role of protons in the galvanic reaction.

引用

页码：891 / 897

页数：7

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