Description: Das Projekt "Assessment of micropollutant degradation using multi-element compound-specific isotope analysis" wird/wurde gefördert durch: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung. Es wird/wurde ausgeführt durch: Universite de Neuchatel, Institut de Geologie et d'Hydrogeologie (IGH), Centre d'Hydrogeologie et de Geothermie (CHYN).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. usw.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Schädlingsbekämpfungsmittel ? Erdöl ? Pestizid ? Arzneimittel ? Kläranlage ? Kohlenwasserstoff ? Schweiz ? Eintragspfad ? Grundwasserzustand ? Hydrogeologie ? Massenspektrometrie ? Spurenstoff ? Persistenter Stoff ? Gelöster organischer Kohlenstoff ? Ackerfläche ? Analyseverfahren ? Bestimmungsmethode ? Feldstudie ? Flächennutzung ? Isotop ? Organischer Schadstoff ? Studie ? Trinkwasser ? Grundwasser ? Wasser ? Wertermittlung ? Messung ? Schadstoff ? Abbau ? Ökosystem ? Persistenz ? Forschung ? Forschungskooperation ? Gesundheit ? Landwirtschaft ? Konzentrationswert ? Konzentrationsmessung ? Quelle ? Isotopenverhältnis ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2013-07-01 - 2016-06-30
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