title: Protective role of fine silts for PAH in a former industrial soil.
abstract: An original combined organic geochemistry and soil science approach was used to elucidate PAH availability controlling factors in a multi-contaminated industrial soil. Water granulodensimetric fractionation was applied to obtain five water-stable material fractions. These were characterized by elemental, molecular and mineral analysis, and microscopic observations. Among the different fractions, fine silts distinguished themselves by higher carbon and nitrogen contents, lower C/N ratio, an enrichment in total PAH and especially high molecular weight compounds, a coal tar signature and the lowest PAH availability. This fine silt fraction seemed to play a protective role for PAH that might be explained by its size and/or its specific reactivity. The mineral phases present in this fraction were proposed to explain the protection of organic matter. This led to a specific molecular signature of OM, having higher sorption properties both processes (sorption and mineral-bound protection) resulting in a lower PAH availability.
authors.affiliation: Laboratoire Sols et Environnement, UMR1120, Université de Lorraine, Vandœuvre-lès-Nancy F-54518, France.
authors.forename: Audrey
authors.initials: A
authors.lastname: Pernot
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Ouvrard
authors.forename: Pierre
authors.initials: P
authors.lastname: Leglize
authors.forename: Pierre
authors.initials: P
authors.lastname: Faure
mesh_terms: D000327:Adsorption; D052918:Environmental Restoration and Remediation; D007221:Industry; D008956:Models, Chemical; D010316:Particle Size; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants