Document Detail


Role of Iron Anode Oxidation on Transformation of Chromium by Electrolysis.
MedLine Citation:
PMID:  23284182     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The potential for chemical reduction of hexavalent chromium Cr(VI) in contaminated water and formation of a stable precipitate by Zero Valent Iron (ZVI) anode electrolysis is evaluated in separated electrodes system. Oxidation of iron electrodes produces ferrous ions causing the development of a reducing environment in the anolyte, chemical reduction of Cr(VI) to Cr(III) and formation of stable iron-chromium precipitates. Cr(VI) transformation rates are dependent on the applied electric current density. Increasing the electric current increases the transformation rates; however, the process is more efficient under lower volumetric current density (for example 1.5 mA L(-1) in this study). The transformation follows a zero order rate that is dependent on the electric current density. Cr(VI) transformation occurs in the anolyte when the electrodes are separated as well as when the electrolytes (anolyte/catholyte) are mixed, as used in electrocoagulation. The study shows that the transformation occurs in the anolyte as a result of ferrous ion formation and the product is a stable Fe(15)Cr(5)(OH)(60) precipitate.
Authors:
Hussam Sarahney; Xuhui Mao; Akram N Alshawabkeh
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-14
Journal Detail:
Title:  Electrochimica acta     Volume:  86     ISSN:  0013-4686     ISO Abbreviation:  Electrochim. Acta     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2013-1-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9875994     Medline TA:  Electrochim Acta     Country:  -    
Other Details:
Languages:  ENG     Pagination:  96-101     Citation Subset:  -    
Affiliation:
Department of Civil and Environmental Engineering, 400 Snell Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Analyzing threshold pressure limitations in microfluidic transistors for self-regulated microfluidic...
Next Document:  The health of adult women in Accra, Ghana: self-reporting and objective assessments 2008-2009.