In northern part of Indian sub-continent, As related environmental and health issues receive attention from all over the world.
Forty-eight sediment samples were collected from the Ganga Alluvial Plain (GAP) and its weathering products (from the Gomati
River) for the study of As distribution and mobilization. These sediment samples were analyzed by Instrumental Neutron Activation
Analysis (INAA) method using Cirus Research Reacter of Bhabha Atomic Research Centre, Mumbai. Average As concentrations in
the GAP sediments (10.44 mg kg−1), the Gomati River bed sediments (1.36 mg kg−1) and the Gomati River suspended sediments (5.30 mg kg−1) were reported. Significant decrease of As content from the alluvial sediments to the river sediments is a clear indication
of its mobilization by chemical weathering processes of mineral biotite. Present study demonstrates the importance of INAA
for quantification and mobilization of As and improves our understanding related to As related environmental issues in northern
India and elsewhere.