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Article Dans Une Revue International Journal of Phytoremediation Année : 2011

In situ assessment of phytotechnologies for multicontaminated soil management

Jérôme Cortet

Résumé

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.
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Dates et versions

hal-01486337 , version 1 (09-03-2017)

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Stéphanie Ouvrard, Christophe Barnier, Pascale Bauda, Thierry Beguiristain, Coralie Biache, et al.. In situ assessment of phytotechnologies for multicontaminated soil management. International Journal of Phytoremediation, 2011, 13 (1), pp.245-263. ⟨10.1080/15226514.2011.568546⟩. ⟨hal-01486337⟩
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