Hydrogeochemical Comparison And
Available online at www.sciencedirect.com Journal of Contaminant Hydrology 99 (2008) 31–48 www.elsevier.com/locate/jconhyd Hydrogeochemical comparison and effects of overlapping redox zones on groundwater arsenic near the Western (Bhagirathi sub-basin, India) and Eastern (Meghna sub-basin, Bangladesh) margins of the Bengal Basin ⁎ Abhijit Mukherjee a, , Mattias von Brömssen b, Bridget R. Scanlon a, Prosun Bhattacharya b, Alan E. Fryar c, Md. Aziz Hasan b, Kazi Matin Ahmed d, Debashis Chatterjee e, Gunnar Jacks b, Ondra Sracek f a Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78758, USA b KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Teknikringen 76, Stockholm, SE-10044, Sweden c Department of Earth and Environmental Sciences, University of Kentucky, 101 Slone Research Bldg, Lexington, KY 40506-0053, USA d Department of Geology, University of Dhaka, Curzon Hall Campus, Dhaka, 1000, Bangladesh e Department of Chemistry, University of Kalyani, Kalyani, West Bengal, India f Institute of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic Received 27 June 2007; received in revised form 12 October 2007; accepted 16 October 2007 Available online 25 October 2007 Abstract Although arsenic (As) contamination of groundwater in the Bengal Basin has received wide attention over the past decade, comparative studies of hydrogeochemistry in geologically different sub-basins within the basin have been lacking. Groundwater samples were collected from sub-basins in the western margin (River Bhagirathi sub-basin, Nadia, India; 90 samples) and eastern margin (River Meghna sub-basin; Brahmanbaria, Bangladesh; 35 samples) of the Bengal Basin.
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