Alkylphenol ethoxylates and bisphenol A in surface water within a heavily urbanized area, such as Paris

Abstract

This work focused on alkylphenol ethoxylates (APEOs) and bisphenol A (BPA) in surface water at the scale of the upper part of the Seine basin. Although this basin is vulnerable, since it undergoes a combination of strong human pressures (Paris conurbation) with very limited dilution via the Seine River, no comprehensive data was available for these compounds. In this context, the evolution of the pollutant concentrations and loads was assessed during two sampling campaigns (April and July 2009) along a 300 km-transect. Hence, 18 stations (10 sites on the Seine River, four tributaries and four wastewater treatment plants -WWTPs) were considered. Additional campaigns were also conducted over 2009 on four sites on the Seine River. The BPA concentrations range from 7.2 to 127 ng.l -1 in surface water, while higher concentrations of APEOs (324 ± 153 ng.l -1 ) were observed. Based on our first results, no spatial variability of concentrations between up-and downstream sites, or any seasonal variability, were highlighted. During the longitudinal campaigns, an increase of the pollutant loads between up-and downstream sites was clearly noticed. Contrary to BPA, for which a limited seasonal variation of loads was observed at the basin outlet (1,400 and 1,500 g.d -1 ), the APEO loads significantly vary (10,000 and 5,500 g.d -1 ). Mass balances between the inputs (tributaries + WWTPs) and the exported loads reveal that the BPA inputs are lower than the exported loads, suggesting that other inputs have to be considered along the transect studied. For APEOs, the inputs appear higher than the exported loads, underscoring the in-stream removal of APEOs. Globally, the results reveal that the removal of APEOs and the number of ethoxylate units are correlated -the longer the ethoxylate chain, the higher the removal.

Alkylphenolic compounds and bisphenol A contamination within a heavily urbanized area: case study of Paris

“…This variability was only studied for the dissolved phase extraction and UPLC-MS-MS analysis and not for the suspended solids. Actually, in receiving water, alkylphenols and BPA are mostly present in the dissolved phase (4-NP: 80%; 4-t-OP: 90% and BPA: 95%; Cladiere et al 2010;Isobe et al 2001). …”

Continental Atlantic Rivers: The Meuse, Loire and Adour-Garonne Basins

“…Historically, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) were the first pollutants studied in the Seine basin (Chevreuil et al, 1987(Chevreuil et al, , 1998Blanchard et al, 1999;Teil et al, 2012). After PAHs and PCBs, other emerging organic pollutants were addressed by the PIREN-Seine program in the Seine River, including phthalates in plastizicers (Teil et al, 2012;Tran et al, 2015), alkylphenols (APs) such as alkylphenol polyethoxylates and bisphenol A (Cladie `re et al, 2010(Cladie `re et al, , 2013(Cladie `re et al, , 2014, pharmaceuticals (Tamtam et al, 2008), polybromodiphenyl ethers (PBDE) such as flame-retardant (Tlili et al, 2012), perfluorinated compounds (Labadie and Chevreuil, 2011a, b), and more recently microplastics (Dris et al, 2015(Dris et al, , 2018. Most of these studies aim mainly at quantifying levels in the river corridor, assessing the sources and dynamics of these pollutants under different hydrological conditions (seasonal variability, low-flow periods vs. floods) and at key stations selected for different types of human pressures (e.g., upstream/downstream of Paris, rural stations, treated and untreated sewage).…”