title: Event-based quantification of emerging pollutant removal for an open stormwater retention basin - loads, efficiency and importance of uncertainties.
abstract: Up to now, emerging contaminants have not been further-studied in in-situ stormwater best management practices and especially in detention basins. In this article, the efficiency of a dry stormwater detention basin was investigated regarding the removal of 7 alkylphenols and alkylphenol ethoxylates, 9 polybrominated diphenyl ethers, 45 pesticides and bisphenol A. Concentrations of contaminants were obtained by chemical analysis on dissolved and particulate phase distinctly. The removal efficiency was assessed on total, dissolved and particulate phase accounting for the global chain of uncertainty with a 95% confidence interval. Results showed that pesticides (rather hydrophilic) are not trapped in the detention basin but are released contrarily to B209 which is mostly in particulate phase. Alkylphenols and alkylphenol ethoxylates are present in both phases and the efficiency is storm event-dependent. Uncertainty consideration in efficiency determination revealed efficiency data, usually presented by raw values are not relevant to conclude on the performance of a detention basin. In this case study, efficiency data with a 95% confidence interval indicate that only 35%, 50% and 41% of campaigns showed an impact (in trapping or releasing) of the detention basin on alkylphenols and ethoxylates, polybrominated diphenyl ethers and pesticides respectively.
authors: University of Lyon, INSA of Lyon, Laboratory of Civil and Environmental Engineering (LGCIE), 34, avenue des Arts, 69621 Villeurbanne Cedex, France. Electronic address: christel.sebastian@free.fr.
authors: C
authors: C
authors: Sébastian
authors: University of Lyon, INSA of Lyon, Laboratory of Civil and Environmental Engineering (LGCIE), 34, avenue des Arts, 69621 Villeurbanne Cedex, France. Electronic address: celine.becouze@insa-lyon.fr.
authors: C
authors: C
authors: Becouze-Lareure
authors: University of Lyon, INSA of Lyon, Laboratory of Civil and Environmental Engineering (LGCIE), 34, avenue des Arts, 69621 Villeurbanne Cedex, France. Electronic address: gislain.lipeme-kouyi@insa-lyon.fr.
authors: G
authors: G
authors: Lipeme Kouyi
authors: University of Lyon, INSA of Lyon, Laboratory of Civil and Environmental Engineering (LGCIE), 34, avenue des Arts, 69621 Villeurbanne Cedex, France. Electronic address: sylvie.barraud@insa-lyon.fr.
authors: S
authors: S
authors: Barraud
mesh_terms: D055867:Cyclonic Storms; D005602:France; D052638:Particulate Matter / Q000032:analysis; D011891:Rain; D035501:Uncertainty; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D052638:Particulate Matter; D014874:Water Pollutants, Chemical
keywords: Alkylphenols; Dry detention basin; Pesticides; Polybrominated diphenyl ethers; Stormwater; Uncertainties