Skip to main content
padlock icon - secure page this page is secure

Open Access Content loaded within last 14 days Behavior of Glyphosate in Wastewater Treatment Plants

Download Article:
 Download
(PDF 315.6 kb)
 

This article is Open Access under the terms of the Creative Commons CC BY-NC licence.

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.
No References for this article.

1 item.

No Article Media
No Metrics

Keywords: ACTIVATED SLUDGE; ADSORPTION; GLYPHOSATE; WASTEWATER TREATMENT

Document Type: Research Article

Affiliations: 1: Agroscope, Plant Protection Chemistry, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, Switzerland;, Email: [email protected] 2: Agroscope, Vegetable-Production Extension, Müller-Thurgau- Strasse 29, CH-8820 Wädenswil, Switzerland 3: Agroscope, Plant Protection Chemistry, Müller-Thurgau-Strasse 29, CH-8820 Wädenswil, Switzerland

Publication date: March 1, 2020

More about this publication?
  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Information for Advertisers
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more