title: Polyethylene passive samplers to determine sediment-pore water distribution coefficients of persistent organic pollutants in five heavily contaminated dredged sediments.
abstract: Pore concentration and partition coefficients of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were determined in sediments from five distinct contaminated sites in France (marine harbour, rivers canals and highway sedimentation tank). The assessment of the risk caused by such micropollutants requires, in most cases, the measurement of their availability. To assess this availability, low density polyethylene (LDPE) membrane samplers were exposed to these sediments under constant and low-level agitation over a period of 46 days. Freely dissolved pore water contaminant concentrations were estimated from the concentration at equilibrium in the LDPE membrane. The depletion of contaminants in the sediments was monitored by the use of performance reference compounds (PRCs). Marked differences in freely dissolved PAH and PCB concentrations and resulting sediment-pore water partition coefficients between these five sediments were observed. Data set was tested onto different empirical and mechanistic models. As final findings, triple domain sorption (a total organic carbon, black carbon and oil phase model) could model PCB data successfully whereas the best fitting for PAH partitioning was obtained by Raoult's Law model.
authors.affiliation: Institut National de l'EnviRonnement Industriel et des RiSques (INERIS), ARDEVIE, Domaine du Petit Arbois, BP 33, 13545 Aix-en-Provence Cedex 04, France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Charrasse
authors.affiliation: Ifremer, RBE-BE-LBCO, rue de l'Ile d'Yeu, 44311 Nantes Cedex 3, France.
authors.forename: Céline
authors.initials: C
authors.lastname: Tixier
authors.affiliation: Institut National de l'EnviRonnement Industriel et des RiSques (INERIS), ARDEVIE, Domaine du Petit Arbois, BP 33, 13545 Aix-en-Provence Cedex 04, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Hennebert
authors.affiliation: Aix Marseille Université, CNRS, Laboratoire de Chimie de l'Environnement, FRE 3416, UMR CNRS 6263, Europôle de l'Arbois, Bâtiment Villemin BP 80, 13545 Aix-en-Provence Cedex 4, France. Electronic address: Pierre.doumenq@univ-amu.fr.
authors.forename: Pierre
authors.initials: P
authors.lastname: Doumenq
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D005602:France; D019015:Geologic Sediments / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D020959:Polyethylene; D045483:Rivers; D012767:Ships; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D020959:Polyethylene; D011078:Polychlorinated Biphenyls
keywords: Dredged sediments; Model comparison; PAHs; PCBs; Passive sampling; Pore water concentration