EF values of Ni were very high, in the range of 9.89–12.37, with an increasing trend oriented to the estuary water where the recorded peak was up to ~10 fold 1.5, while in the case of As, Cd and Pb pollution which was rather similar at all sites and over the three seasons, Ni reached the highest peaks during the monsoon and at all sites.
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Spatial distribution of trace elements in surface sediments of Hooghly (Ganges) river estuary in West Bengal, India.
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