Document Detail


Pyrene and chrysene fate in surface soil and sand microcosms.
MedLine Citation:
PMID:  11351420     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polycyclic aromatic hydrocarbons (PAHs) are major components of wastes from municipal gas plants and many wood preservatives. Soil contaminated with these wastes is a potential threat to human health because of the carcinogenicity of many PAHs. This study follows the fate of two four-ring PAHs, pyrene and chrysene, in three matrices: an adapted soil (obtained from a site contaminated with PAHs for more than 75 years), an uncontaminated soil (with and without an inoculum of adapted soil), and sand mixed with an inoculum of adapted soil. Radiolabeled pyrene, chrysene, and salicylic acid (a metabolite of PAH biodegradation) were used to trace the mineralization, transformation, extractability, and formation of an unextractable residual over time. Linear approximations of the rates of these processes were made. High-performance liquid chromatography (HPLC) analysis of extracts from inoculated soil showed the transient formation of two known metabolites: 1-hydroxypyrene (from pyrene) and 1-hydroxy-2-naphthoic acid (from chrysene). The amount of extractable label diminished steadily over the course of the study in systems that were not inhibited with sodium azide, whereas the amount of extractable label remained relatively constant in inhibited systems. Correspondingly, the amount of nonextractable residual label generally increased during each incubation in uninhibited systems, whereas the amount of this residual label remained relatively constant in inhibited systems. In contrast, the rate and extent of mineralization varied widely across matrix types. This suggests that alterations of the PAH that impact extractability and residual formation are common, in contrast to mineralization, which was apparently limited to adapted communities.
Authors:
J C Roper; F K Pfaender
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  20     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-05-15     Completed Date:  2001-06-14     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  223-30     Citation Subset:  IM    
Affiliation:
Department of Environmental Sciences and Engineering, CB7400 Rosenau Hall, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7400, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Biodegradation, Environmental
Chrysenes / chemistry,  pharmacokinetics*
Oxidation-Reduction
Pyrenes / chemistry,  pharmacokinetics*
Soil Pollutants / pharmacokinetics*
Grant Support
ID/Acronym/Agency:
E505948//PHS HHS
Chemical
Reg. No./Substance:
0/Chrysenes; 0/Pyrenes; 0/Soil Pollutants; 129-00-0/pyrene; 218-01-9/chrysene

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


Previous Document:  Ecological condition of the estuaries of the Atlantic and Gulf Coasts of the United States.
Next Document:  Linear alkylbenzenes in muscle tissues of white croaker near a large ocean outfall in southern Calif...