Surface and Aqueous Geochemistry Group, Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall Braun Hall, Building 320, Stanford, CA 94305-2115 United States ; United States Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025-3591 United States
Surface and Aqueous Geochemistry Group, Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall Braun Hall, Building 320, Stanford, CA 94305-2115 United States
United States Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025-3591 United States
Department of Civil & Environmental Engineering, Stanford University, Clark Center E- 250, 318 Campus Drive, Stanford, CA 94305-5429 United States
Surface and Aqueous Geochemistry Group, Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall Braun Hall, Building 320, Stanford, CA 94305-2115 United States ; Stanford Synchrotron Radiation Laboratory, SLAC, 2545 Sand Hill Road, MS 69, Menlo Park, CA 94025 United States