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Article dans une revue

Substances prioritaires dans les rejets urbains de temps de pluie: Cas du déversoir de Clichy

Abstract : This study evaluated the quality of combined sewer overflows (CSO) in an urban watershed, such as Paris, by providing accurate data on the occurrence of priority pollutants (PPs) and additional substances, as well as on the significance of their concentrations in comparison with wastewater and stormwater. Of the 88 substances monitored, 49 PPs were detected, with most of these also being frequently encountered in wastewater and stormwater, thus confirming their ubiquity in urban settings. For the majority of organic substances, concentrations range between 0.01 and 1 ug/L, while metals tend to display concentrations above 10 μg/L Despite this ubiquity, CSO, wastewater and stormwater feature a number of differences in both their concentration ranges and pollutant patterns. For most hydrophobic organic pollutants and some particulate-bound metals, CSOs exhibit higher concentrations than those found in stormwater and wastewater, due to the contribution of in-sewer deposit erosion. For pesticides and Zn, CSOs have shown concentrations close to those of stormwater, suggesting runoff as the major contributor, while wastewater appears to be the main source of volatile organic compounds. Surprisingly, similar concentration ranges have been found for DEHP and tributyltin compounds in CSOs, wastewater and stormwater. The last section of this article identifies substances for which CSO discharges might constitute a major risk of exceeding Environmental Quality Standards in receiving waters and moreover indicates a significant risk for PAHs, tributyltin compounds and chloroalkanes. The data generated during this survey can subsequently be used to identify PPs of potential significance that merit further investigation.
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Article dans une revue
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https://hal-enpc.archives-ouvertes.fr/hal-00756722
Contributeur : Johnny Gasperi <>
Soumis le : vendredi 23 novembre 2012 - 15:59:03
Dernière modification le : samedi 24 octobre 2020 - 14:32:04

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  • HAL Id : hal-00756722, version 1

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Johnny Gasperi, Mathieu Cladière, Sally Zgheib, Vincent Rocher, Régis Moilleron, et al.. Substances prioritaires dans les rejets urbains de temps de pluie: Cas du déversoir de Clichy. Techniques Sciences Méthodes , ASTEE/EDP Sciences, 2012, 4, pp.30-43. ⟨hal-00756722⟩

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