Projekt

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Assessment of micropollutant degradation using multi-element compound-specific isotope analysis

Titel Englisch Assessment of micropollutant degradation using multi-element compound-specific isotope analysis
Gesuchsteller/in Hunkeler Daniel
Nummer 141805
Förderungsinstrument Sinergia
Forschungseinrichtung Centre d'hydrogéologie et de géothermie Université de Neuchâtel
Hochschule Universität Neuenburg - NE
Hauptdisziplin Andere Gebiete der Umweltwissenschaften
Beginn/Ende 01.07.2013 - 30.06.2017
Bewilligter Betrag 901'214.00
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Keywords (3)

biodegradation; stable isotopes; organic micropollutants

Lay Summary (Deutsch)

Lead
Grundwasser ist in vielen Ländern eine wichtige Trinkwasserquelle. In Gebieten mit intensiver Landnutzung gelangen oft organische Mikroverunreinigungen ins Grundwasser. Im Projekt wird eine neue Methode entwickelt, um abzuklären ob solche Stoffe persistent sind oder abgebaut werden.
Lay summary
Grundwasser ist in vielen Ländern eine wichtige Trinkwasserquelle. In der Schweiz stammt zum Beispiel 80% des Trinkwassers aus Pumpwerken in Flusstälern und Quellen. In Zonen mit intensiver Landnutzung gelangen häufig organische Schadstoffe ins Grundwasser wie Pestizide aus der Landwirtschaft oder pharmazeutische Produkte aus Abwasserreinigungsanlagen. Diese Schadstoffe werden oft als organische Mikroverunreinigungen bezeichnet. Um die langfristige Entwicklung der Grundwasserqualität voraussagen zu können ist es wichtig zu wissen, ob solche Stoffe im Grundwasser persistent sind oder abgebaut werden. Das Ziel des Projektes ist es eine neue Methode zu entwickeln, um den Abbau von organischen Mikroverunreinigungen im Grundwasser nachzuweisen. Die Methode beruht auf der Messung der Isotopenverhältnisse. Es wird erwartet dass Moleküle mit leichten Isotopen (z.B. Kohlenstoff mit der Masse 12) schneller abgebaut werden als Moleküle mit schweren Isotopen (z.B. Kohlenstoff mit Masse 13). Deshalb kann aufgrund der Messung der Isotopenverhältnisse auf den Abbaugrad zurückgeschlossen werden. Je weiter der Abbau fortgeschritten ist, desto mehr von den schweren Isotopen sollten in den Molekülen gefunden werden. Das Projekt umfasst die Entwicklung von neuen Methoden um Isotopenverhältnisse in typischen organischen Mikroverunreinigungen zu messen, Laborstudien um abzuklären wie stark sich Isotopenverhältnisse beim Abbau verschieben und Feldstudien. Das Projekt wird gemeinsam vom Zentrum für Hydrogeologie und Geothermie der Universität Neuenburg, der EAWAG und dem Helmholtz Zentrum München durchgeführt.
Direktlink auf Lay Summary Letzte Aktualisierung: 04.06.2013

Lay Summary (Englisch)

Lead
Lay summary
Groundwater is a major source of drinking water in many countries. For example, in Switzerland 80% of drinking water originates from pumping wells in valleys or springs. Due to the intense landuse, organic contaminants are frequently detected in groundwater such as pesticides from agriculture or pharmaceuticals from waste water treatment plants. These contaminants are usually denoted as organic micropollutants. To ensure a high groundwater quality in the longterm, it is important to know if these contaminants persist in the subsurface or degrade. The aim of this project is to develop and test a new approach to evaluate the degradation of organic micropollutants in the subsurface. The method consists of the measurement of the isotopic composition of organic micropollutants. It is expected that molecules that contain light isotopes (for example carbon with a mass of 12) are degraded more rapidly compared to molecules with heavy isotopes (for example carbon 13). Hence by measuring the isotopic composition, the extend of degradation and thus the longterm fate of the contaminants can be determined. The higher the proportion of molecules with heavy isotopes is, the more degradation has occurred. The project includes the development of new methods to measure the isotopic composition of organic micropollutants, laboratory studies to explore how isotope ratios change during their degradation and field tests.
Direktlink auf Lay Summary Letzte Aktualisierung: 01.01.0001

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Adsorbing vs. non-adsorbing tracers for assessing pesticide transport in arable soils
Torrentó Clara, Prasuhn Volker, Spiess Ernst, Ponsin Violaine, Melsbach Aileen, Lihl Christina, Glauser Gaétan, Hofstetter Thomas, Elsner Martin, Hunkeler Daniel, Adsorbing vs. non-adsorbing tracers for assessing pesticide transport in arable soils, in Vadose Zone Journal.

Zusammenarbeit

Gruppe / Person Land
Formen der Zusammenarbeit
Börje Sellergren/Malmö University Schweden (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Faina Gelman/Geological Survey of Israel Israel (Asien)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Volker Prasuhn/Agroscope Reckenholz-Tänikon (ART) Research Station Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Forschungsinfrastrukturen
Julian Renpenning, Matthias Gehre/Helmholtz Centre for Environmental Research-UFZ Deutschland (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Gaetan Glauser/Neuchâtel Analytical Chemistry Platform (NPAC) Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
- Publikation
Juliane Hollender/EAWAG Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten
Christian Stamm/EAWAG Schweiz (Europa)
- vertiefter/weiterführender Austausch von Ansätzen, Methoden oder Resultaten

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences Poster Compound-specific isotope analysis (CSIA) of pesticides for evaluating transformation processes in the vadose zone: long-term lysimeter experiments 09.07.2017 Mt. Verità, Schweiz Elsner Martin; Hofstetter Thomas; Bakkour Rani; Torrento Aguerri Clara; Hunkeler Daniel;
Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences Vortrag im Rahmen einer Tagung Unravelling the fate of organic contaminants in the subsurface using stable isotopes. Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences 09.07.2017 Mt. Verità, Schweiz Torrento Aguerri Clara; Hofstetter Thomas; Elsner Martin; Bakkour Rani; Hunkeler Daniel;
Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences Poster Chlorine isotope fractionation associated with hydrolysis of the herbicides atrazine, acetochlor and metolachlor 09.07.2017 Mt. Verità, Schweiz Hofstetter Thomas; Hunkeler Daniel; Bakkour Rani; Torrento Aguerri Clara; Elsner Martin;
Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences Poster δ15N isotope analysis to investigate desphenylchloridazon degradation: method development 09.07.2017 Mt. Verità, Schweiz Hunkeler Daniel; Bakkour Rani; Torrento Aguerri Clara; Hofstetter Thomas; Elsner Martin;
Isotopes 2017. The Cross-Disciplinary Conference on Stable Isotope Sciences Poster From milli- to micro-pollutants: sample preparation of challenging environmental samples for compound-specific isotope analysis 09.07.2017 Mt. Verità, Schweiz Torrento Aguerri Clara; Bakkour Rani; Hunkeler Daniel; Elsner Martin; Hofstetter Thomas;
Wasser 2017 - Jahrestagung der Wasserchemischen Gesellschaft Poster Beurteilung der Pestizid-Dynamiken im Boden und in der Aerationszone mittels Verbindungs-spezifischer Isotopenanalyse: Eine Lysimeter-Studie 22.05.2017 Donaueschingen, Deutschland Hunkeler Daniel; Hofstetter Thomas; Bakkour Rani; Torrento Aguerri Clara; Elsner Martin;
17th Lysimeter Conference Vortrag im Rahmen einer Tagung Assessing pesticide dynamics in soil and vadose zone using compound-specific isotope analysis (CSIA): A lysimeter study 09.05.2017 Gumpenstein, Oesterreich Torrento Aguerri Clara; Hofstetter Thomas; Elsner Martin; Bakkour Rani; Hunkeler Daniel;
EGU General Assembly 2017 Vortrag im Rahmen einer Tagung Compound-specific isotope analysis (CSIA) for assessing pesticide dynamics in soil and vadose zone 24.04.2017 Vienna, Oesterreich Bakkour Rani; Torrento Aguerri Clara; Hunkeler Daniel; Elsner Martin; Hofstetter Thomas;
Institute of Biogeochemistry and Pollutant Dynamics PhD congress Poster Stable isotope analysis of glyphosate in aquatic environments 21.04.2017 Dübendorf, Schweiz Hofstetter Thomas; Bakkour Rani;
ACS 253nd National Meeting, Division of Environmental Chemistry Vortrag im Rahmen einer Tagung Carbon and nitrogen isotope fractionation reveals the biodegradation of organic pollutants 02.04.2017 San Francisco, CA, Vereinigte Staaten von Amerika Hofstetter Thomas;
Gordon Research Conference (GRC) on Environmental Science Water Poster Molecularly-imprinted polymers enable the C and N isotope analysis of polar organic micropollutants in the μg/L range 26.06.2016 Holderness, NH, Vereinigte Staaten von Amerika Hofstetter Thomas; Bakkour Rani;
Gordon Research Conference (GRC) on Environmental Science Water Vortrag im Rahmen einer Tagung New challenges for the stable isotope analysis of organic (micro)pollutant transformation 26.06.2016 Holderness, NH, Vereinigte Staaten von Amerika Hofstetter Thomas;
Institute of Biogeochemistry and Pollutant Dynamics PhD congress Vortrag im Rahmen einer Tagung How to do stable isotope analysis for one micropollutant? 01.04.2016 Zurich, Schweiz Bakkour Rani; Hofstetter Thomas;
11th Applied Isotope Geochemistry Conference (AIG-11) Vortrag im Rahmen einer Tagung Fate of four herbicides in an irrigated field cropped with corn: lysimeter experiments 21.09.2015 Orléans, Frankreich Bakkour Rani; Elsner Martin; Torrento Aguerri Clara; Hofstetter Thomas; Ryabenko Evgenia; Hunkeler Daniel;
EGU General Assembly 2015 Poster Compound specific isotope analysis to investigate pesticide degradation in lysimeter experiments at field conditions 12.04.2015 Vienna, Oesterreich Hofstetter Thomas; Bakkour Rani; Elsner Martin; Torrento Aguerri Clara; Hunkeler Daniel; Ryabenko Evgenia;
Institute of Biogeochemistry and Pollutant Dynamics PhD congress Poster The MATRIX - last hurdle before the stable isotope analysis of micropollutants 10.04.2015 Duebendorf, Schweiz Bakkour Rani;
249th American Chemical Society National Meeting & Exposition Vortrag im Rahmen einer Tagung Insights into the (bio)transformation processes of benzotriazoles from compound-specific isotope analysis and transformation product identification 22.03.2015 Denver, CO, Vereinigte Staaten von Amerika Hofstetter Thomas; Bakkour Rani;


Kommunikation mit der Öffentlichkeit

Kommunikation Titel Medien Ort Jahr
Print (Buch, Brochuren, Infoblätter) Le côté sombre des herbicides. Uninews, No 36 Romanische Schweiz 2015
Print (Buch, Brochuren, Infoblätter) Where do soil pollutants go? Horizons–the Swiss magazine for scientific research, No 107 Deutschschweiz 2015

Auszeichnungen

Titel Jahr
Institute of Biogeochemisty and Pollutant Dynamics PhD congress - Best Presentation Award for contribution "How to do stable isotope analysis for one micropollutant?" 2016
Institute of Biogeochemistry and Pollutant Dynamics PhD congress - Best Poster Award for contribution "The MATRIX - last hurdle before the stable isotope analysis of micropollutants" 2015

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
139111 Expanding Compound-Specific Isotope Analysis Towards Polar Organic Micropollutants and Chlorine Isotopes 01.09.2012 R'EQUIP
153534 Tracking biotransformation of hexachlorocyclohexane isomers by compound specific isotope analysis 01.07.2014 Projektförderung (Abt. I-III)

Abstract

The frequent detection of polar organic micropollutants such as pesticides, consumer care products or pharmaceutical in water is an increasing concern for human and ecosystem health. Currently, little is known about the long-term fate of such compounds in aquatic systems due to the difficulty in demonstrating their degradation. Compound-specific isotope analysis (CSIA) of multiple elements is a potentially powerful method to evaluate organic micropollutant transformation because pathway-specific isotope fractionation is expected to occur for many compounds as suggested by some recent studies of the applicants. For classical priority pollutants such as chlorinated and petroleum hydrocarbons, CSIA has become a well-established method to identify and quantify degradation pathways. The extension of the CSIA approach to micropollutants is challenging for several reasons: Micropollutants are typically present in lower concentrations thus requiring more extensive preconcentration, they often are more polar hence requiring derivatization before gas chromatographic analysis, they frequently include heteroatoms complicating their conversion to measurement gases for mass spectrometry, and they are degraded by a wide range of mechanisms, whose isotope effects are not known yet.The main goal of this project is to extend the CSIA approach for assessing degradation pathways to polar organic micropollutants, thereby demonstrating that (i) it is feasible to analyze the isotopic composition of common organic micropollutants at field-relevant concentration levels (analytical method development), (ii) a multi-isotope approach can be used to gain unique insight into pathways of micropollutant degradation (process studies), (iii) transformation processes can be identified and quantified based on micropollutants' isotope ratios under field conditions and/or in experimental settings mimicking field conditions (system studies). Given the numerous challenges that have to be overcome to establish multi-element CSIA for micropollutant, a collaborative research strategy will be chosen that brings together leading experts in the field of CSIA and micropollutant studies from the University of Neuchâtel (UNINE), the Helmholtz Zentrum München (HGMU), the Swiss Federal Institute of Aquatic Science and Technology (Eawag), and Agroscope Reckenholz-Tänikon Research Station (ART). The participation of the German partner, HGMU, is essential for the analytical part of the project and will make it possible to transfer some of its unique expertise in micropollutant CSIA to Swiss institutions.The project consists of three PhD theses. Each of them focuses on a specific, highly-relevant organic micropollutant and emphasizes one of the three conceptual activities, that is analytical methods, transformation processes, and system studies. Subproject 1 (led by UNINE) investigates if multi-element CSIA can be used to identify and quantify micropollutant transformation in complex systems where transformation and transport processes interact. The project will make use of lysimeter experiments, which allow control of experimental conditions. The project will focus on substances for which pathway-specific isotope fractionation and analytical methods are already established. Subproject 2 (HGMU) is dedicated to the challenge of multielement isotope analysis for micropollutants. Its objectives are the isotope analysis of lysimeter samples, as well as the analytical method development and degradation process studies for chloridazon and desphenyl-chloridazon as emerging pesticides of concern. Subproject 3 (Eawag) targets a class of consumer chemicals (benzotriazoles), which are widely encountered in the aquatic environment but whose fate assessment is hampered by the lack of knowledge regarding (bio)degradation processes. The overall project includes extensive collaboration across subprojects: Multi-element-CSIA methods will be jointly developed bringing together the complementary expertise of the partners, laboratory process studies will be carried out in close collaboration sharing experimental setups and tools, and the lysimeter experiments will be jointly executed sharing the high load of concentration measurements and CSIA analysis. In order to favor collaboration, joint semi-annual meetings are planned, as well as short term scientific visits of the PhD fellows at the partner institutions. The project is expected to lead to a series of groundbreaking publications on multi-element micropollutant CSIA and bring the method a substantial step forward towards its field application as unique method to characterize the long-term micropollutant fate in aquatic systems, a pressing issue for society.
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