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Specific stability of organic matter in a stormwater infiltration basin

Abstract : Purpose In stormwater infiltration basins, sediments accumulate at the soil surface and cause a gradual filling up of soil pores. These sediments are composed of a mixture of natural and anthropogenic (as oil products) organic matters (OMs). The degradation kinetics of these sediment OMs and their biological stability has been neglected. This study aimed to characterize sediments OMs to assess their evolution and their capacity to degrade. Materials and methods To characterize OMs from the sediment layer, we measured at several places in the infiltration basin, total OM and carbon (C) contents, C distribution and biochemical fractions of the OM in the different size fractions, the sediment’s C mineralization potential, soil microbial biomass, and organic pollutants (polycyclic aromatic hydrocarbons (PAHs)) in the sediment layer. Results and discussion OM contents were high and varied from 66 to 193 g kg ?1 from the inlet to the outlet of basin. Depending on rainfall intensity and volume, organic particles were deposited at varying distances in the basin by decantation
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Submitted on : Wednesday, July 3, 2013 - 4:40:39 PM
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A. Coulon, A. El-Mufleh, Patrice Cannavo, Laure Vidal Beaudet, B. Béchet, et al.. Specific stability of organic matter in a stormwater infiltration basin. Journal of Soils and Sediments, Springer Verlag, 2012, 13 (3), pp.508-518. ⟨10.1007/s11368-012-0549-2⟩. ⟨hal-00841033⟩



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