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Elimination Rate Constants of 46 Polycyclic Aromatic Hydrocarbons in the Unionid Mussel, Elliptio complanata (2003)
BibTeX
@MISC{Thorsen03eliminationrate,
author = {W. A. Thorsen and D. Forestier and P. R. Lazaro and W. G. Cope and D. Shea},
title = {Elimination Rate Constants of 46 Polycyclic Aromatic Hydrocarbons in the Unionid Mussel, Elliptio complanata},
year = {2003}
}
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Abstract
Abstract. Elimination rate constants (k2), biological half-lives (t1/2), and the time required to reach 95 % of steady-state (t95) are reported for 46 individual polycyclic aromatic hydrocar-bons (PAHs) including both parent and alkyl homologues, for the freshwater unionid mussel, Elliptio complanata. Elimina-tion rate constants generally follow first-order kinetics and range from 0.04/day (d) for perylene to 0.26/d for 2,6-dimeth-ylnapthalene, half-lives range from 2.6 to 16.5 d, and t95 values range from 11.3 to 71.3 d. These values compare well with other k2, t1/2, and t95 values reported in the literature for PAHs and other classes of hydrophobic organic contaminants. A linear regression of k2 versus logKow demonstrates dependence of PAH elimination on hydrophobicity, as measured by an r2 value of 0.83, and produces the following regression equation: k20.06 (logKow) 0.44. This study provides evidence that
Keyphrases
elliptio complanata elimination rate constant unionid mussel polycyclic aromatic hydrocarbon t95 value k2 versus logkow r2 value freshwater unionid mussel first-order kinetics half-lives range hydrophobic organic contaminant elimina-tion rate constant alkyl homologues pah elimination linear regression biological half-lives following regression equation individual polycyclic aromatic hydrocar-bons
