Preliminary evidence of a link between surface soil properties and the arsenic content of shallow groundwater in Bangladesh

a Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA b Department of Earth and Environmental Sciences, Columbia University, NY 10027, USA c Department of Earth and Environmental Engineering, Columbia University, NY 10027, USA d Marine Sciences Research Center, State University of New York, Stony Brook, NY 11794, USA e Queens College, City University of New York, Flushing, NY 11367, USA f Idaho National Environmental and Engineering Laboratory, Idaho Falls, Idaho, USA g Department of Geology, University of Dhaka, Dhaka 1000, Bangladesh