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Impact de l'oxydation chimique et de la refonctionnalisation sur des paramètres physico-chimiques et biologiques de terres contaminées au HAP

Abstract : In order to clean up polycyclic aromatic hydrocarbon (PAH) contaminated soils, various techniques have been developed during the last decades, but their impact on soil functions was rarely considered. The objective of this study was to assess the impact of chemical oxidation treatments on different physico-chemical and biological parameters of PAH contaminated soil and to propose solutions to improve the biological functioning of oxidized soil. Various laboratory and field experiments have shown that the efficiency of chemical oxidation reactions (Fenton reaction and activated persulfate) on PAH concentrations depended on pollutant availability and soil physico-chemical properties. Besides, intense acidification processes have been observed on uncarbonated soil with a strong impact on soil physico-chemical and biological parameters. Moreover, this alteration was higher with activated persulfate treatment, leading to the loss of trace metals in water percolation. In the strongly acidified soil, the input of materials, suitable for pH increase, resulted in the restoration of biological activities and soil capacity to support vegetation. The association of chemical oxidation treatment and restoration techniques could present a good mean for soil rehabilitation. Finally, an index, which aimed to represent soil conditions based on the weight given to different parameters, was proposed and was used to evaluate changes induced by oxidation treatments and restoration techniques
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https://hal.univ-lorraine.fr/tel-01749200
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  • HAL Id : tel-01749200, version 1
  • PRODINRA : 345681

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Fabien Laurent. Impact de l'oxydation chimique et de la refonctionnalisation sur des paramètres physico-chimiques et biologiques de terres contaminées au HAP. Agronomie. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0033⟩. ⟨tel-01749200⟩

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