Document Detail


Vapor phase transport of unexploded ordnance compounds through soils.
MedLine Citation:
PMID:  12371476     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Unexploded ordnance (UXO) is a source of concern at several U.S. Department of Defense (DOD) sites. Localization of munitions and fate and transport of the explosive compounds from these munitions are a major issue of concern. A set of laboratory experiments were conducted in specially designed flux chambers to measure the evaporative flux of three explosive compounds (2,4-dinitrotoluene, 2,6-dinitrotoluene, and 1,3-dinitrobenzene) from three different soils. The effect of different soil moisture contents, the relative humidity of air contacting the soil surface, and soil temperature on the chemical fluxes were evaluated. A diffusion model was used to describe the chemical transport mechanism in the soil pore air. The soil-air partition constant was treated as a fit parameter in the model because of the uncertainty in the a priori estimation. The model predicts the qualitative trends of the experimental fluxes satisfactorily. Under extremely dry conditions, the flux decreased more rapidly than that predicted by the model. The fluxes from soils at 24 degrees C were higher than those at 14 degrees C, indicating a larger volatilization driving force at the higher temperature.
Authors:
Raghunathan Ravikrishna; Sally L Yost; Cynthia B Price; Kalliat T Valsaraj; James M Brannon; Paul H Miyares
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  21     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2002 Oct 
Date Detail:
Created Date:  2002-10-09     Completed Date:  2003-03-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2020-6     Citation Subset:  IM    
Affiliation:
Gordon A. and Mary Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge 70803, USA.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Computer Simulation
Dinitrobenzenes / analysis,  chemistry*
Explosions*
Models, Chemical
Soil Pollutants / analysis*
Volatilization
Chemical
Reg. No./Substance:
0/Dinitrobenzenes; 0/Soil Pollutants; 121-14-2/2,4-dinitrotoluene; 606-20-2/2,6-dinitrotoluene; 99-65-0/3-dinitrobenzene

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


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