Journal
CHEMOSPHERE
Volume 77, Issue 1, Pages 133-139Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2009.05.008
Keywords
Glyphosate; Degradation; Urban runoff; Storm sewers; Wastewaters
Categories
Funding
- programme PIREN-Seine
- SEDIF (Syndicat des Eaux d'Ile-de-France)
- Eau de Paris
- Lyonnaise des Eaux
- Veolia Eau
- Agence de l'Eau Seine-Normandie
- Conseil regional d'Ile-de-France
- Conseil General des Yvelines
- Conseil General de l'Essonne
- Syndicat mixte de la vallee de l'Orge aval (SIVOA)
- Syndicat Intercommunal pour l'Amenagement Hydraulique de la Vallee de l'YV-ETTE (SIAHVY)
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A study of glyphosate and aminomethyl phosphonic acid (AMPA) transfer in the Orge watershed (France) was carried out during 2007 and 2008. Water samples were collected in surface water, wastewater sewer, storm sewer and wastewater treatment plant (WWTP). These two molecules appeared to be the most frequently detected ones in the rivers and usually exceeded the European quality standard concentrations of 0.1 mu g L-1 for drinking water. The annual glyphosate estimated load was 1.9 kg year(-1) upstream (agricultural zone) and 179.5 kg year(-1) at the catchment outlet (urban zone). This result suggests that the contamination of this basin by glyphosate is essentially from urban origin (road and railway applications). Glyphosate reached surface water prevalently through storm sewer during rainfall event. Maximum concentrations were detected in storm sewer just after a rainfall event (75-90 mu g L-1). High concentrations of glyphosate in surface water during rainfall events reflected urban runoff impact. AMPA was always detected in the sewerage system. This molecule reached surface water mainly via WWTP effluent and also through storm sewer. Variations in concentrations of AMPA during hydrological episodes were minor compared to glyphosate variations. Our study highlights that AMPA and glyphosate origins in urban area are different. During dry period, detergent degradation seemed to be the major AMPA source in wastewater. (C) 2009 Elsevier Ltd. All rights reserved.
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