1. Faculty of Chemistry, Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstrasse 5, D-45141 Essen, Germany
2. IWW Water Centre, Moritzstrasse 26, D-45476 Mülheim an der Ruhr, Germany
3. Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstrasse 5, D-45141 Essen, Germany
4. Faculty of Chemistry, Theoretical Chemistry, University of Duisburg-Essen, Universitätsstrasse 5, D-45141 Essen, Germany
5. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland
6. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Universitätstrasse 16, CH-8092 Zürich, Switzerland