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Declining bioavailability and inappropriate estimation of risk of persistent compounds
Author(s) -
Kelsey Jason W.,
Alexander Martin
Publication year - 1997
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620160327
Subject(s) - bioavailability , phenanthrene , environmental chemistry , atrazine , pollutant , earthworm , naphthalene , chemistry , bacteria , extraction (chemistry) , environmental science , toxicology , pesticide , biology , agronomy , chromatography , organic chemistry , pharmacology , genetics
Earthworms ( Eisenia foetida ) assimilated decreasing amounts of atrazine, phenanthrene, and naphthalene that had been incubated for increasing periods of time in sterile soil. The amount of atrazine and phenanthrene removed from soil by mild extractants also decreased with time. The declines in bioavailability of the three compounds to earthworms and of naphthalene to bacteria were not reflected by analysis involving vigorous methods of solvent extraction; similar results for bioavailability of phenanthrene and 4‐nitrophenol to bacteria were obtained in a previous study conducted at this laboratory. We suggest that regulations based on vigorous extractions for the analyses of persistent organic pollutants in soil do not appropriately estimate exposure or risk to susceptible populations.