1. Department
of Environmental Geochemistry, Bayreuth Center for Ecology and Environmental
Research (BayCEER), University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
2. Institute
of Biogeochemistry and Pollutant Dynamics, Department of Environmental
Systems Science, ETH Zürich, 8092 Zürich, Switzerland
3. Department
of Water Resources and Drinking Water, Swiss Federal Institute of Aquatic Science and Technology (EAWAG), 8600 Dübendorf, Switzerland
4. U.S. Geological
Survey, Menlo Park, California, United States