J. Phys. IV France 107 (2003) 293
Mobilization of arsenic in sedimentary aquifer vis-à-vis subsurface iron reduction processesD. Chatterjee1, S. Chakraborty1, 2, B. Nath1, 3, J. Jana1, R. Bhattacharyya1, S. B. Mallik3 and L. Charlet2
1 Department of Chemistry, University of Kalyani, Kalyani 741235, West Bengal, India
2 LGIT, OSUG, BP. 53, 38041 Grenoble cedex 9, France
3 Department of Geological Sciences, Jadavpur University, Jadavpur, Kolkata-32, India
Groundwater of the arsenic affected areas demonstrates that the water is Ca-bocarbonate type and typical anoxie in nature. High arsenic groundwater is distributed in patches and "hot spots" are identifie in palaeo-meander belt. Iron rich arsenic traps undergo reduction and release redox sensitive species (As and Fe) under local reducing conditions. Releases of redox species are often depends on land-use pattern and the abundance of bio-available fonns of iron oxides/minerals.
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