1. Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for environmental and aquatic sciences, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66, boulevard Carl-Vogt, CH-1211 Geneva, Switzerland
2. Limnological Center, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 2, 1015 Lausanne, Switzerland
3. Process Engineering, Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland