Parameters controlling oxygenated polycyclic aromatic compounds mobilization in pah contaminated soils

Abstract : In PAH-contaminated sites, the 16 US EPA PAHs are the only compounds considered in the frame of site characterization and monitoring. However, O-PACs (oxygenated polycyclic aromatic compounds) are associated with PAHs and occur in high concentration on these sites (in the range of 10 to 50% of the total PAH level). They are emitted from the same sources as PAHs but can also be formed by PAH degradations during natural attenuation and remediation. These O-PACs are (i) characterized by a higher polarity and consequently, a potential higher mobility in the environment than PAHs, and (ii) can exhibit a higher toxicity. That is why, this project aims to study parameters controlling O-PAC mobilization and transfer in soils to better evaluate their potential risk for groundwater resources and define if O-PACs should be included in site characterization or monitoring. In this work, O-PAC mobilization from two PAH contaminated soils sampled at former coking plant site is assessed by means of a Design Of batch lixiviation Experiments (DOE) under various conditions (temperature, ionic strength, pollutant availability, pH and natural organic matter). Dissolved organic carbon (DOC) and PAC concentrations (including 16 PAHs and 11 O-PACs) are measured after SPE extraction of the water samples. Column-leaching experiments will then be carried out under saturated and unsaturated conditions to assess O-PAC transfer to uncontaminated soils. In addition to these laboratory-controlled experiments, in situ experiments are carried out to assess PAC release and transfer in a lysimeter column and groundwater is regularly sampled on a pilot site.
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Conference papers
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Submitted on : Tuesday, August 7, 2018 - 2:24:13 PM
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  • HAL Id : ineris-01855102, version 1

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Marine Boulange, Catherine Lorgeoux, Julien Michel, Raymond Michels, Pierre Faure. Parameters controlling oxygenated polycyclic aromatic compounds mobilization in pah contaminated soils. 25. International Symposium on Polycyclic Aromatic Compounds (ISPAC 2015), Sep 2015, Bordeaux, France. ⟨ineris-01855102⟩

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