Document Detail


Fringe-controlled natural attenuation of phenoxy acids in a landfill plume: integration of field-scale processes by reactive transport modeling.
MedLine Citation:
PMID:  16913131     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Data obtained from a field study of an aquifer contaminated by landfill leachate and related laboratory experiments suggest that natural attenuation of phenoxy acid herbicides such as mecoprop (MCPP) occurs in the transition zone between the anaerobic plume core and the overlying aerobic water body. The location of this transition zone is assumed to be primarily controlled by vertical transverse dispersion processes occurring downstream of the pollution source. A reactive transport modeling study was carried out to evaluate this conceptual model. The transport was simulated for a two-dimensional vertical cross section to quantify the combined physical, geochemical, and microbial processes that affect the fate of the phenoxy acid herbicides. The simulations, showing removal of phenoxy acids, an increase of phenoxy acid degraders in the fringe zone, and a dependency of the results on vertical transverse dispersivity, are compatible with the hypothesis of fringe-controlled aerobic biodegradation of the phenoxy acids.
Authors:
Henning Prommer; Nina Tuxen; Poul L Bjerg
Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  40     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-08-17     Completed Date:  2007-03-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4732-8     Citation Subset:  IM    
Affiliation:
CSIRO Land and Water, Private Bag No. 5, Wembley WA 6913, Australia. Henning.Prommer@csiro.au
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MeSH Terms
Descriptor/Qualifier:
2-Methyl-4-chlorophenoxyacetic Acid / analogs & derivatives,  chemistry
Biodegradation, Environmental
Diffusion
Models, Biological
Models, Chemical*
Oxidation-Reduction
Phenols / chemistry*
Water Movements*
Water Pollutants, Chemical / analysis,  chemistry*
Chemical
Reg. No./Substance:
0/Phenols; 0/Water Pollutants, Chemical; 93-65-2/mecoprop; 94-74-6/2-Methyl-4-chlorophenoxyacetic Acid

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


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