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Le transport d’hydrocarbures aromatiques polycycliques (HAP) dans les sols non saturés

Abstract : In industrialized countries, numerous brownfields polluted with polycyclic aromatic hydrocarbons (PAHs) and heavy metals are identified. Some of these pollutants are carcinogenic and mutagenic. Their migration through the soil and their likely downward transfer to the water table should be investigated. Field scale studies are essential to determine the possible impacts on groundwater, human beings and ecosystems. The aim of this PhD work carried out in the frame of the GISFI (French Scientific Interest Group working on Industrial Brownfields) was to assess PAH transport in a former coking plant soil using an original lysimetric system. The lysimeter was filled with 3 tons of a polluted soil (PAH: 5 g/kg). It was a stainless steel column (2 m high, 1.124 m diameter) equipped with tensiometers, TDR probes and suction cups at three depths (50, 100 and 150 cm). Therefore water was sampled at four levels: 50, 100, 150 and 200 cm (free drainage water at the bottom of the lysimeter). It was submitted to the natural atmospheric conditions and its surface was bare. The 16 US EPA PAHs were monitored in pore water (3 levels) and in the leaching water, at the outlet of the lysimeter. PAH concentrations in water were very low (below 1.5 μg/L) in the four sampling levels. They were below or in the range of the solubility. This study showed that PAH release was highly dependent on the water content of the soil.
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  • HAL Id : ineris-01869272, version 1



Julien Michel, Sébastien Denys. Le transport d’hydrocarbures aromatiques polycycliques (HAP) dans les sols non saturés. Rapport Scientifique INERIS, 2010, 2009-2010, pp.38-40. ⟨ineris-01869272⟩



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