J. Phys. IV France
Volume 107, May 2003
Page(s) 293 - 296

J. Phys. IV France
107 (2003) 293
DOI: 10.1051/jp4:20030299

Mobilization of arsenic in sedimentary aquifer vis-à-vis subsurface iron reduction processes

D. 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.

© EDP Sciences 2003