Ecotoxicological risk assessment of contaminants of emerging concern identified by “suspect screening” from urban wastewater treatment plant effluents at a territorial scale
نویسندگان
چکیده
Urban wastewater treatment plants (WWTP) are a major vector of highly ecotoxic contaminants emerging concern (CECs) for urban and sub-urban streams. Ecotoxicological risk assessments (ERAs) provide essential information to public environmental authorities. Nevertheless, ERAs mainly performed at very local scale (one or few WWTPs) on pre-selected list CECs. To cope with these limits, the present study aims develop territorial-scale ERA CECs previously identified by “suspect screening” analytical approach (LC-QToF-MS) quantified in effluents 10 WWTPs urbanized territory during three periods year. Among CECs, this work focused pharmaceutical residue pesticides. was conducted following two complementary methods: (1) single substance approach, based calculation each CEC quotients (RQs) ratio Predicted Environmental Concentration (PEC) No Effect (PNEC), (2) mixture assessment (“cocktail effect”) concentration addition model (CA), summing individual RQs. Chemical results led an 41 (37 pharmaceuticals 4 pesticides) detected treated effluents. Single 19 implicated least one significant streams, risks DEET, diclofenac, lidocaine, atenolol, terbutryn, atorvastatin, methocarbamol, venlafaxine (RQs reaching 39.84, 62.10, 125.58, 179.11, 348.24, 509.27, 1509.71 3097.37, respectively). Mixture allowed identification (RQmix > 1) 9 studied. It also remarked that leading individually negligible could imply mixture. Finally, territorial showed diversity situations, highest concerns 3 WWTPs: 2 biggest discharging into large French river, Rhône, smallest WWTP releases small intermittent stream.
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2021
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2021.146275