title: Bioavailability of desorption-resistant phenanthrene to the oligochaete Ilyodrilus templetoni.
abstract: We investigated bioavailability, as measured by the biota-sediment accumulation factor (BSAF), of reversibly sorbed and desorption-resistant phenanthrene to the deposit-feeding freshwater tubificid oligochaete Ilyodrilus templetoni. Desorption-resistant, phenanthrene-contaminated sediments were prepared by a sequential batch desorption method by washing with an isopropanol solution. The BSAFs averaged 1.20 +/- 0.32 and 0.59 +/- 0.13 for reversibly sorbed phenanthrene and desorption-resistant phenanthrene, respectively, indicating a significantly reduced bioavailability of desorption-resistant phenanthrene. A generalized model assuming a linear relationship between pore-water concentration and normalized bioaccumulation described 91% of the variance for both measured and selected literature data of the BSAF. The reduced bioavailibility of desorption-resistant phenanthrene was thus well described by physical and chemical measures of partitioning between pore water and sediment.
authors.affiliation: Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Lu
authors.forename: Danny D
authors.initials: DD
authors.lastname: Reible
authors.forename: John W
authors.initials: JW
authors.lastname: Fleeger
authors.forename: Yunzhou
authors.initials: Y
authors.lastname: Chai
mesh_terms: D000327:Adsorption; D000818:Animals; D001682:Biological Availability; D019015:Geologic Sediments / Q000737:chemistry; D009835:Oligochaeta; D010616:Phenanthrenes / Q000493:pharmacokinetics*; D016062:Porosity; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics*
chemical_list: D010616:Phenanthrenes; D014874:Water Pollutants, Chemical; C031181:phenanthrene