1. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Ueberlandstrasse 133, CH-8600 Duebendorf
or Seestrasse 79, CH-6047 Kastanienbaum, Switzerland
2. Agroscope, Institute for Food Sciences, CH-8820 Wädenswil, Switzerland
3. Institute
of Biogeochemistry and Pollutant Dynamics, ETH Zurich, CH-8092 Zurich, Switzerland
4. School of
Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland