Behavior of Glyphosate in Wastewater Treatment Plants
The herbicide glyphosate is frequently detected in surface waters and its occurrence is linked to agricultural as well as urban uses. Elevated concentrations downstream of wastewater treatment plants (WWTPs) suggest that municipal wastewater is an important source of glyphosate in surface waters. We...
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Swiss Chemical Society
2020-03-01
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doaj-e4f365555a2249efb882fe6f632ce7682020-11-25T03:37:19ZdeuSwiss Chemical SocietyCHIMIA0009-42932673-24242020-03-0174315616010.2533/chimia.2020.156Behavior of Glyphosate in Wastewater Treatment PlantsThomas Poiger0Martina Keller1Ignaz J. Buerge2Marianne E. Balmer3Agroscope, Plant Protection Chemistry, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, SwitzerlandAgroscope, Vegetable-Production Extension, Müller-Thurgau- Strasse 29, CH-8820 Wädenswil, SwitzerlandAgroscope, Plant Protection Chemistry, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, SwitzerlandAgroscope, Plant Protection Chemistry, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, SwitzerlandThe herbicide glyphosate is frequently detected in surface waters and its occurrence is linked to agricultural as well as urban uses. Elevated concentrations downstream of wastewater treatment plants (WWTPs) suggest that municipal wastewater is an important source of glyphosate in surface waters. We therefore conducted a study at a typical municipal WWTP in Switzerland to characterize the seasonality of glyphosate occurrence, the removal efficiency, and the processes involved in glyphosate removal. Glyphosate was present in raw (mechanically treated) wastewater during the whole study period (April to November). A lab incubation experiment with activated sludge indicated negligible degradation of glyphosate. Lack of degradation combined with strong adsorption lead to substantial enrichment of the compound in the sludge. Due to this enrichment and the long residence time of activated sludge (several days, compared to hours for wastewater itself), concentrations in treated wastewater show comparatively little variation, whereas concentrations in raw wastewater may fluctuate considerably. Overall removal efficiencies were in the range of 71–96%. This behavior could be described qualitatively using a numerical model that included input of glyphosate via raw wastewater, adsorption to activated sludge, and export via treated wastewater and excess sludge, but excluded degradation processes.https://www.ingentaconnect.com/contentone/scs/chimia/2020/00000074/00000003/art00009activated sludgeadsorptionglyphosatewastewater treatment |
collection |
DOAJ |
language |
deu |
format |
Article |
sources |
DOAJ |
author |
Thomas Poiger Martina Keller Ignaz J. Buerge Marianne E. Balmer |
spellingShingle |
Thomas Poiger Martina Keller Ignaz J. Buerge Marianne E. Balmer Behavior of Glyphosate in Wastewater Treatment Plants CHIMIA activated sludge adsorption glyphosate wastewater treatment |
author_facet |
Thomas Poiger Martina Keller Ignaz J. Buerge Marianne E. Balmer |
author_sort |
Thomas Poiger |
title |
Behavior of Glyphosate in Wastewater Treatment Plants |
title_short |
Behavior of Glyphosate in Wastewater Treatment Plants |
title_full |
Behavior of Glyphosate in Wastewater Treatment Plants |
title_fullStr |
Behavior of Glyphosate in Wastewater Treatment Plants |
title_full_unstemmed |
Behavior of Glyphosate in Wastewater Treatment Plants |
title_sort |
behavior of glyphosate in wastewater treatment plants |
publisher |
Swiss Chemical Society |
series |
CHIMIA |
issn |
0009-4293 2673-2424 |
publishDate |
2020-03-01 |
description |
The herbicide glyphosate is frequently detected in surface waters and its occurrence is linked to agricultural as well as urban uses. Elevated concentrations downstream of wastewater treatment plants (WWTPs) suggest that municipal wastewater is an important source of glyphosate in surface waters. We therefore conducted a study at a typical municipal WWTP in Switzerland to characterize the seasonality of glyphosate occurrence, the removal efficiency, and the processes involved in glyphosate removal. Glyphosate was present in raw (mechanically treated) wastewater during the whole study period (April to November). A lab incubation experiment with activated sludge indicated negligible degradation of glyphosate. Lack of degradation combined with strong adsorption lead to substantial enrichment of the compound in the sludge. Due to this enrichment and the long residence time of activated sludge (several days, compared to hours for wastewater itself), concentrations in treated wastewater show comparatively little variation, whereas concentrations in raw wastewater may fluctuate considerably. Overall removal efficiencies were in the range of 71–96%. This behavior could be described qualitatively using a numerical model that included input of glyphosate via raw wastewater, adsorption to activated sludge, and export via treated wastewater and excess sludge, but excluded degradation processes. |
topic |
activated sludge adsorption glyphosate wastewater treatment |
url |
https://www.ingentaconnect.com/contentone/scs/chimia/2020/00000074/00000003/art00009 |
work_keys_str_mv |
AT thomaspoiger behaviorofglyphosateinwastewatertreatmentplants AT martinakeller behaviorofglyphosateinwastewatertreatmentplants AT ignazjbuerge behaviorofglyphosateinwastewatertreatmentplants AT marianneebalmer behaviorofglyphosateinwastewatertreatmentplants |
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1724545831409811456 |