Document Detail


Accumulation of weathered polycyclic aromatic hydrocarbons (PAHs) by plant and earthworm species.
MedLine Citation:
PMID:  16337258     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Experiments were conducted to assess the bioavailability of polyclycic aromatic hydrocarbons (PAHs) in soil from a Manufactured Gas Plant site. Three plant species were cultivated for four consecutive growing cycles (28 days each) in soil contaminated with 36.3 microg/g total PAH. During the first growth period, Cucurbita pepo ssp. pepo (zucchini) tissues contained significantly greater quantities of PAHs than did Cucumis sativus (cucumber) and Cucurbita pepo ssp. ovifera (squash). During the first growth cycle, zucchini plants accumulated up to 5.47 times more total PAH than did the other plants, including up to three orders of magnitude greater levels of the six ring PAHs. Over growth cycles 2-4, PAH accumulation by zucchini decreased by 85%, whereas the uptake of the contaminants by cucumber and squash remained relatively constant. Over all four growth cycles, the removal of PAHs by zucchini was still twice that of the other species. Two earthworm species accumulated significantly different amounts of PAH from the soil; Eisenia foetida and Lumbricus terrestris contained 0.204 and 0.084 microg/g total PAH, respectively, but neither species accumulated measurable quantities 5 or 6 ring PAHs. Lastly, in abiotic desorption experiments with an aqueous phase of synthetically prepared organic acid solutions, the release of 3 and 4 ring PAHs from soil was unaffected by the treatments but the desorption of 5-6 ring constituents was increased by up to two orders of magnitude. The data show that not only is the accumulation of weathered PAHs species-specific but also that the bioavailability of individual PAH constituents is highly variable.
Authors:
Zakia D Parrish; Jason C White; Mehmet Isleyen; Martin P N Gent; William Iannucci-Berger; Brian D Eitzer; Jason W Kelsey; Maryjane Incorvia Mattina
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2005-12-06
Journal Detail:
Title:  Chemosphere     Volume:  64     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-07-03     Completed Date:  2006-08-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  609-18     Citation Subset:  IM    
Affiliation:
Department of Soil and Water, Connecticut Agricultural Experiment Station, CAES, 123 Huntington Street, New Haven, 06504, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomass
Cucumis sativus / growth & development*
Cucurbita / growth & development*
Hydroponics
Molecular Weight
Oligochaeta / chemistry*
Polycyclic Hydrocarbons, Aromatic / analysis*
Soil Pollutants / analysis*
Chemical
Reg. No./Substance:
0/Polycyclic Hydrocarbons, Aromatic; 0/Soil Pollutants

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


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