Document Detail

Relative proportions of polycyclic aromatic hydrocarbons differ between accumulation bioassays and chemical methods to predict bioavailability.
MedLine Citation:
PMID:  19647356     Owner:  NLM     Status:  MEDLINE    
Chemical methods to predict the bioavailable fraction of organic contaminants are usually validated in the literature by comparison with established bioassays. A soil spiked with polycyclic aromatic hydrocarbons (PAHs) was aged over six months and subjected to butanol, cyclodextrin and tenax extractions as well as an exhaustive extraction to determine total PAH concentrations at several time points. Earthworm (Eisenia fetida) and rye grass root (Lolium multiflorum) accumulation bioassays were conducted in parallel. Butanol extractions gave the best relationship with earthworm accumulation (r(2) < or = 0.54, p < or = 0.01); cyclodextrin, butanol and acetone-hexane extractions all gave good predictions of accumulation in rye grass roots (r(2) < or = 0.86, p < or = 0.01). However, the profile of the PAHs extracted by the different chemical methods was significantly different (p < 0.01) to that accumulated in the organisms. Biota accumulated a higher proportion of the heavier 4-ringed PAHs. It is concluded that bioaccumulation is a complex process that cannot be predicted by measuring the bioavailable fraction alone.
Jose L Gomez-Eyles; Chris D Collins; Mark E Hodson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-07-31
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  158     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-11-30     Completed Date:  2010-02-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  278-84     Citation Subset:  IM    
University of Reading, School of Human and Environmental Sciences, Department of Soil Science, Reading RG6 6DW, Berkshire, United Kingdom.
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MeSH Terms
Biological Assay / methods*
Environmental Monitoring / methods*
Oligochaeta / metabolism
Polycyclic Hydrocarbons, Aromatic / metabolism*
Grant Support
//Biotechnology and Biological Sciences Research Council
Reg. No./Substance:
0/Polycyclic Hydrocarbons, Aromatic

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