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Homologue specific analysis of a polyether trisiloxane surfactant in German surface waters and study on its hydrolysis.

Authors
  • Michel, Amandine1
  • Brauch, Heinz-Jürgen2
  • Worch, Eckhard3
  • Lange, Frank T4
  • 1 DVGW Water Technology Center (DVGW-Technologiezentrum Wasser, TZW), Karlsruher Str. 84, 76139 Karlsruhe, Germany; TU Dresden, Faculty of Environmental Sciences, Institute of Water Chemistry, 01062 Dresden, Germany. , (Germany)
  • 2 DVGW Water Technology Center (DVGW-Technologiezentrum Wasser, TZW), Karlsruher Str. 84, 76139 Karlsruhe, Germany. , (Germany)
  • 3 TU Dresden, Faculty of Environmental Sciences, Institute of Water Chemistry, 01062 Dresden, Germany. , (Germany)
  • 4 DVGW Water Technology Center (DVGW-Technologiezentrum Wasser, TZW), Karlsruher Str. 84, 76139 Karlsruhe, Germany. Electronic address: [email protected] , (Germany)
Type
Published Article
Journal
Environmental pollution (Barking, Essex : 1987)
Publication Date
Mar 01, 2014
Volume
186
Pages
126–135
Identifiers
DOI: 10.1016/j.envpol.2013.11.020
PMID: 24370670
Source
Medline
Keywords
License
Unknown

Abstract

The occurrence of a polyether trisiloxane surfactant in the ng L(-1) range in German surface waters is reported for the first time. The studied surfactant does not ubiquitously occur in the aquatic environment but can reach surface waters on a local scale. As a first step towards the understanding of the environmental fate, the hydrolysis was studied according to the OECD guideline 111. It confirmed that the trisiloxane surfactant is sensitive to hydrolysis and that the hydrolysis rate strongly depends on the pH and the temperature. If one takes only into account the hydrolysis, the trisiloxane surfactant could persist several weeks in river water (the half-life in water is approximately 50 days at pH 7, 25 °C, and an initial concentration of 2 mg L(-1)). A degradation product, more polar than the initial trisiloxane surfactant, was identified by high resolution mass spectrometry.

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