Document Detail


Determination of electron donors by comparing reaction rates for in situ bioremediation of nitrate-contaminated groundwater.
MedLine Citation:
PMID:  17018418     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Groundwater contaminated by nitrates occurs frequently. In this research, fumarate, acetate, formate, lactate, propionate, ethanol, and methane were evaluated as a potential electron donor and carbon source by comparing the denitrification rate for the in situ bioremediation of nitrate contaminated groundwater. The denitrification rate for each substance was the quickest in the order of: fumarate > hydrogen > formate/Lactate > ethanol > propionate > methanol > acetate. Microcosm studies were performed with fumarates and acetates. When fumarates were used as a substrate, nitrates were removed completely at a rate of 0.66 mmol/day, while the conversion rate from nitrate to nitrogen gas and other by-products was 87%. For the microcosm test, 42 mg of fumarates were needed to remove 30 mg of NO(3)--N/L. When using acetate as a sole carbon source, 31% of nitrates were removed during the initial adjustment period. Among the removed fractions, however, 83% of the nitrates were removed by the cell growth. Overall, the nitrate removal rate was 0.37 mmol/day when acetate was used as a sole carbon source. The acetate showed longer lag time before denitrification occurred, which implied that fumarate would have been a better carbon source compared to acetate as more amounts were utilized for nitrate removal than cell growth.
Authors:
Seong-Wook Oa; Geonha Kim; Young Kim
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  41     ISSN:  1093-4529     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2006  
Date Detail:
Created Date:  2006-10-04     Completed Date:  2007-01-23     Revised Date:  2009-08-14    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2359-72     Citation Subset:  IM    
Affiliation:
Department of Railroad, Civil and Environmental Engineering, WooSong University, Daejeon, Korea. swoa@wsu.ac.kr
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MeSH Terms
Descriptor/Qualifier:
Acetates / chemistry,  metabolism
Bacteria / growth & development,  metabolism
Biodegradation, Environmental
Carbon / chemistry,  metabolism*
Electrons
Feasibility Studies
Fumarates / chemistry,  metabolism
Korea
Nitrates / chemistry,  metabolism*
Time Factors
Water Microbiology*
Water Pollutants, Chemical / chemistry,  metabolism*
Water Purification* / methods
Water Supply*
Chemical
Reg. No./Substance:
0/Acetates; 0/Fumarates; 0/Nitrates; 0/Water Pollutants, Chemical; 7440-44-0/Carbon

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


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