1. Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
2. Department of Soil and Crop Sciences, Colorado State University, Fort Collins, Colorado 80523-1170, United States
3. National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Dr., Tallahassee, Florida 32310-4005, United States
4. U.S. Geological Survey, Earth System Processes Division, Water Mission Area, Lakewood, Colorado 80225-0001, United States
5. Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Colorado 80309-0607, United States
6. Environmental Engineering Program, University of Colorado, Boulder, Colorado 80309-0428, United States