| Removal of chromium from synthetic plating waste by zero-valent iron and sulfate-reducing bacteria. | |
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MedLine Citation:
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PMID: 16121509 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Experiments were conducted to evaluate the potential of zero-valent iron and sulfate-reducing bacteria (SRB) for reduction and removal of chromium from synthetic electroplating waste. The zero-valent iron shows promising results as a reductant of hexavalent chromium (Cr+6) to trivalent chromium (Cr+3), capable of 100% reduction. The required iron concentration was a function of chromium concentration in the waste stream. Removal of Cr+3 by adsorption or precipitation on iron leads to complete removal of chromium from the waste and was a slower process than the reduction of Cr+6. Presence SRB in a completely mixed batch reactor inhibited the reduction of Cr+6. In a fixed-bed column reactor, SRB enhanced chromium removal and showed promising results for the treatment of wastes with low chromium concentrations. It is proposed that, for waste with high chromium concentration, zero-valent iron is an efficient reductant and can be used for reduction of Cr+6. For low chromium concentrations, a SRB augmented zero-valent iron and sand column is capable of removing chromium completely. |
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Authors:
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Saumyen Guha; Puja Bhargava |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Water environment research : a research publication of the Water Environment Federation Volume: 77 ISSN: 1061-4303 ISO Abbreviation: Water Environ. Res. Publication Date: 2005 Jul-Aug |
Date Detail:
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Created Date: 2005-08-26 Completed Date: 2005-12-29 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9886167 Medline TA: Water Environ Res Country: United States |
Other Details:
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Languages: eng Pagination: 411-6 Citation Subset: IM |
Affiliation:
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Department of Civil Engineering, Indian Institute of Technology, Kanpur, India. sguha@iitk.ac.in |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Bacteria / metabolism* Biodegradation, Environmental Bioreactors Carcinogens, Environmental / isolation & purification Chromium / isolation & purification*, metabolism Hydrogen-Ion Concentration Iron Compounds / chemistry* Kinetics Oxidation-Reduction Sulfates / metabolism Water Pollutants, Chemical* Water Purification / methods* |
| Chemical | |
Reg. No./Substance:
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0/Carcinogens, Environmental; 0/Iron Compounds; 0/Sulfates; 0/Water Pollutants, Chemical; 18540-29-9/chromium hexavalent ion; 7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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