1. Swiss Federal Institute of Aquatic Science and Technology, Eawag, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland
2. School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
3. Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic