J. Phys. IV France
Volume 107, May 2003
Page(s) 285 - 288

J. Phys. IV France
107 (2003) 285
DOI: 10.1051/jp4:20030297

Propagation of a natural arsenic plume in West Bengal, India

L. Charlet1, S. Chakraborty1, 2, T. Appello3, A.A. Latscha1, D. Chatterjee2 and B. Mallick3

1  LGIT, OSUG, BP. 53, 38041 Grenoble cedex 9, France
2  Department of Chemistry, University of Kalyani, Kalyani 741235, West Bengal, India
3  Department of Geology, University of Javlapur, Kalkotta, West Bengal, India

The distribution pattern of arsenic contamination in the Ganges delta aquifer is patchy, and one "hotspot" has been investigated in detail. A contaminated plume originating from a paleo-meander is moving along water flow lines, with an arsenic distribution of 42% As (III) and 58% As(V) in average. A ID reactive transport model of the plume shows a much faster move of the plume once competion between bicarbonate, phosphate, ferrous iron and arsenic ions are taken into account.

© EDP Sciences 2003