Évolution des caractéristiques physico-chimiques et écotoxicologiques des sédiments accumulés dans un bassin de retenue-décantation : premiers résultats du projet ANR CABRRES.

Abstract : Detention basins are valuable facilities for urban stormwater management from the standpoint of both flood control and mitigating particulate pollutants by means of settling processes. Trapped sediments represent specific waste. The amount and the characterization of these accumulated sediments are also a very important issue for practitioners because these solids have to be frequently removed and managed as waste. A physical and chemical characteristics (metals, PAHs, pesticides) and ecotoxicological evaluation of these contaminated sediments have been carried out in the framework of CABRRES French programme. Sediments accumulated over about 6 months and 6 years in retention/detention basin located in the east of Lyon, France, were sampled at five different points. These preliminary results show: spatial variability for Cd, Pb, Zn and Σ16 PAHs, with the higher contamination at one point; and an ecotoxicological risk for accumulated sediments over about 6 years. These preliminary results may contribute to improve the management of detention basins in term of maintenance frequency and appropriate ways to recycle sediments.
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https://hal.archives-ouvertes.fr/hal-02064500
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Submitted on : Tuesday, March 12, 2019 - 12:09:42 AM
Last modification on : Saturday, June 22, 2019 - 1:39:36 AM

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C. Becouze-Lareure, C. Gonzalez-Merchan, C. Sébastian, Y. Perrodin, S. Barraud, et al.. Évolution des caractéristiques physico-chimiques et écotoxicologiques des sédiments accumulés dans un bassin de retenue-décantation : premiers résultats du projet ANR CABRRES.. Techniques Sciences Méthodes , ASTEE/EDP Sciences, 2016, pp.43-55. ⟨10.1051/tsm/201604043 ⟩. ⟨hal-02064500⟩

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