Document Detail


A sequential zero valent iron and aerobic biodegradation treatment system for nitrobenzene.
MedLine Citation:
PMID:  14568399     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The remediation of nitroaromatic contaminated groundwater is sometimes difficult because nitroaromatic compounds are resistant to biodegradation and, when they do transform, the degradation of the products may also be incomplete. A simple nitroaromatic compound, nitrobenzene, was chosen to assess the feasibility of an in situ multi-zone treatment system at the laboratory scale. The proposed treatment system consists of a zero valent granular iron zone to reduce nitrobenzene to aniline, followed by a passive oxygen release zone for the aerobic biodegradation of the aniline daughter product using pristine aquifer material from Canadian Forces Base (CFB) Borden, Ontario, as an initial microbial source. In laboratory batch experiments, nitrobenzene was found to reduce quickly in the presence of granular iron forming aniline, which was not further degraded but remained partially sorbed onto the granular iron surface. Aniline was found to be readily biodegraded with little metabolic lag under aerobic conditions using the pristine aquifer material. A sequential column experiment, containing a granular iron reducing zone and an aerobic biodegradation zone, successively degraded nitrobenzene and then aniline to below detection limits (0.5 microM) without any noticeable reduction in hydraulic conductivity from biofouling, or through the formation of precipitates.
Authors:
L S Bell; J F Devlin; R W Gillham; P J Binning
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of contaminant hydrology     Volume:  66     ISSN:  0169-7722     ISO Abbreviation:  J. Contam. Hydrol.     Publication Date:  2003 Nov 
Date Detail:
Created Date:  2003-10-21     Completed Date:  2004-03-02     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  8805644     Medline TA:  J Contam Hydrol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  201-17     Citation Subset:  IM    
Affiliation:
GHD Pty Ltd., New South Wales, Australia.
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MeSH Terms
Descriptor/Qualifier:
Bacteria, Aerobic / physiology*
Biodegradation, Environmental
Chemical Precipitation
Iron / chemistry*
Nitrobenzenes / metabolism*
Oxidation-Reduction
Water Pollutants / metabolism*
Water Supply
Chemical
Reg. No./Substance:
0/Nitrobenzenes; 0/Water Pollutants; 7439-89-6/Iron; 98-95-3/nitrobenzene

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


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