title: Desorption kinetics of PAHs from aged industrial soils for availability assessment.
abstract: Persistent organic pollutants (POPs), such as polycyclic aromatic hydrocarbons (PAHs), may be found in high concentrations in soils of former industrial sites including manufactured gas plants or coking plants. Techniques using moderate solvent extraction, biological tests or solid phase extraction have proved useful for pollution availability estimation. However, more accurate and reliable measurement tools specifically adapted to low concentrations are still needed. Based on a solid-liquid extraction using a Tenax® resin, we suggest a protocol to assess the bioavailability of PAHs, dedicated to aged industrial wasteland soils. Desorption kinetics were measured on three representative contaminated industrial soils. Results were modeled using a first order two-compartment model that provided an estimate of the rapidly desorbing fraction, which was considered to be available, over a 30 h extraction period. In conclusion, this method, allowing the measurement of the available fraction, might prove more relevant than the total concentration value when assessing soil contamination related risks. It may also predict achievable bioremediation performances.
authors.affiliation: INRA, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France; Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Barnier
authors.affiliation: INRA, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France; Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France. Electronic address: stephanie.ouvrard@univ-lorraine.fr.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Ouvrard
authors.affiliation: INRA, Laboratoire Agronomie et Environnement, UMR 1121, Vandœuvre-lès-Nancy F-54518, France; Université de Lorraine, Laboratoire Agronomie et Environnement, UMR 1121, Vandœuvre-lès-Nancy F-54518, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Robin
authors.affiliation: INRA, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France; Université de Lorraine, Laboratoire Sols et Environnement, UMR 1120, Vandœuvre-lès-Nancy F-54518, France.
authors.forename: Jean Louis
authors.initials: JL
authors.lastname: Morel
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D007700:Kinetics; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants
keywords: Availability; Desorption kinetics; Industrial soils; Modeling; PAHs; Tenax® extraction