Document Detail

In situ bioremediation of nitrate and perchlorate in vadose zone soil for groundwater protection using gaseous electron donor injection technology.
MedLine Citation:
PMID:  17243243     Owner:  NLM     Status:  MEDLINE    
When present in the vadose zone, potentially toxic nitrate and perchlorate anions can be persistent sources of groundwater contamination. Gaseous electron donor injection technology (GEDIT), an anaerobic variation of petroleum hydrocarbon bioventing, involves injecting electron donor gases, such as hydrogen or ethyl acetate, into the vadose zone, to stimulate biodegradation of nitrate and perchlorate. Laboratory microcosm studies demonstrated that hydrogen and ethanol promoted nitrate and perchlorate reduction in vadose zone soil and that moisture content was an important factor. Column studies demonstrated that transport of particular electron donors varied significantly; ethyl acetate and butyraldehyde were transported more rapidly than butyl acetate and ethanol. Nitrate removal in the column studies, up to 100%, was best promoted by ethyl acetate. Up to 39% perchlorate removal was achieved with ethanol and was limited by insufficient incubation time. The results demonstrate that GEDIT is a promising remediation technology warranting further validation.
Patrick J Evans; Mary M Trute
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Water environment research : a research publication of the Water Environment Federation     Volume:  78     ISSN:  1061-4303     ISO Abbreviation:  Water Environ. Res.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2007-01-24     Completed Date:  2007-03-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886167     Medline TA:  Water Environ Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2436-46     Citation Subset:  IM    
CDM, Bellevue, Washington 98005, USA.
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MeSH Terms
Biodegradation, Environmental
Flow Injection Analysis*
Nitrates / isolation & purification*
Perchloric Acid / isolation & purification*
Soil Pollutants / isolation & purification*
Water Pollutants / isolation & purification*
Water Purification / methods*
Reg. No./Substance:
0/Nitrates; 0/Soil Pollutants; 0/Water Pollutants; 7601-90-3/Perchloric Acid

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

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