AI Article Synopsis
- The study focused on the presence and fate of glyphosate and its byproduct AMPA in the Sûre river catchment, where the population density is low and primarily served by small to medium-sized wastewater treatment plants (WWTPs).
- High levels of AMPA were detected in wastewater inflows, with industrial sources being the main contributor, while glyphosate mainly originated from domestic sources.
- The research also explored the effectiveness of Constructed Wetlands in a Vertical Flow configuration, demonstrating that they could significantly reduce the levels of both glyphosate and AMPA before their release into surface water, achieving up to 90% and 50% elimination, respectively.
Article Abstract
The fate of glyphosate and its metabolite AminoMethylPhosponic acid (AMPA) was followed at the catchment of the Sûre river, mainly characterized by small population density and small and medium-sized wastewater treatment plants (WWTPs). A high concentration of AMPA was found in water samples collected in inlet from different wastewater streams, the industry being the main contributor, while glyphosate resulted mainly in domestic origin. The two molecules were also monitored in the anaerobic digestion as in the supernatant produced after centrifugation (reject water). A total of 0.0713 and 2.24 g/d of glyphosate and AMPA respectively were regularly returned to the activated sludge tank (AST) indicating a 20% impact of the sludge management line on the global wastewater mass balance. Finally, the use of Constructed Wetlands (CWs) in Vertical Flow (VF) configuration was tested as a suitable technology to retain both glyphosate and AMPA (90 and up to 50% elimination respectively) and minimize their discharge into surface water.
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| http://dx.doi.org/10.1016/j.chemosphere.2023.139843 | DOI Listing |
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