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Opportunity to recycle chromium(VI) by in situ electro‐oxidation
Author(s) -
Lateef Huma,
Grimes Susan M,
Chaudhary Abdul J,
Goswami Nimai C
Publication year - 2009
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.2084
Subject(s) - chromium , anodic oxidation , aqueous solution , redox , in situ , oxidizing agent , chemistry , reuse , electrochemistry , effluent , inorganic chemistry , electrode , waste management , environmental science , environmental engineering , organic chemistry , engineering
BACKGROUND: Chemical oxidation is generally used to oxidise Cr(III) to Cr(VI) in aqueous effluents, but this leads to Cr(VI) solutions that are contaminated with oxidising agents, which reduces their recycle and reuse value. RESULTS: We now report an electrolytic method for the in situ oxidation of Cr(III). Complete oxidation of Cr(III) occurs anodically using an initial pH of 5.0 and a current of 3.0 A. CONCLUSIONS: Anodic oxidation is shown to achieve in situ oxidation of Cr(III) to Cr(VI) to permit the regeneration of Cr(VI) solutions for recycle in oxidising industrial processes. Copyright © 2008 Society of Chemical Industry