title: In situ assessment of phytotechnologies for multicontaminated soil management.
abstract: Due to human activities, large volumes of soils are contaminated with organic pollutants such as polycyclic aromatic hydrocarbons, and very often by metallic pollutants as well. Multipolluted soils are therefore a key concern for remediation. This work presents a long-term evaluation of the fate and environmental impact of the organic and metallic contaminants of an industrially polluted soil under natural and plant-assisted conditions. A field trial was followed for four years according to six treatments in four replicates: unplanted, planted with alfalfa with or without mycorrhizal inoculation, planted with Noccaea caerulescens, naturally colonized by indigenous plants, and thermally treated soil planted with alfalfa. Leaching water volumes and composition, PAH concentrations in soil and solutions, soil fauna and microbial diversity, soil and solution toxicity using standardized bioassays, plant biomass, mycorrhizal colonization, were monitored. Results showed that plant cover alone did not affect total contaminant concentrations in soil. However, it was most efficient in improving the contamination impact on the environment and in increasing the biological diversity. Leaching water quality remained an issue because of its high toxicity shown by micro-algae testing. In this matter, prior treatment of the soil by thermal desorption proved to be the only effective treatment.
authors: Laboratoire Sols et Environnement, Nancy-Université, INRA, Vandoeuvre-lès-Nancy, France. Stephanie.Ouvrard@ensaia.inpl-nancy.fr
authors: S
authors: S
authors: Ouvrard
authors: C
authors: C
authors: Barnier
authors: P
authors: P
authors: Bauda
authors: T
authors: T
authors: Beguiristain
authors: C
authors: C
authors: Biache
authors: M
authors: M
authors: Bonnard
authors: C
authors: C
authors: Caupert
authors: A
authors: A
authors: Cébron
authors: J
authors: J
authors: Cortet
authors: S
authors: S
authors: Cotelle
authors: M
authors: M
authors: Dazy
authors: P
authors: P
authors: Faure
authors: J F
authors: JF
authors: Masfaraud
authors: J
authors: J
authors: Nahmani
authors: F
authors: F
authors: Palais
authors: P
authors: P
authors: Poupin
authors: N
authors: N
authors: Raoult
authors: P
authors: P
authors: Vasseur
authors: J L
authors: JL
authors: Morel
authors: C
authors: C
authors: Leyval
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D001681:Biological Assay; D019607:Brassicaceae / Q000254:growth & development* / Q000378:metabolism; D004787:Environmental Pollution; D006358:Hot Temperature; D000455:Medicago sativa / Q000254:growth & development* / Q000378:metabolism; D008670:Metals / Q000032:analysis / Q000378:metabolism; D038821:Mycorrhizae / Q000254:growth & development* / Q000378:metabolism; D035261:Plant Components, Aerial / Q000254:growth & development; D018517:Plant Roots / Q000254:growth & development; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism*; D012987:Soil; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D008670:Metals; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; D014867:Water