1. Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland
2. School of Architecture, Civil and Environmental Engineering, EPF Lausanne, 1015 Lausanne, Switzerland
3. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 Zürich, Switzerland
4. Ecosens AG, 8304 Wallisellen, Switzerland