Journal
MARINE POLLUTION BULLETIN
Volume 109, Issue 1, Pages 539-549Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.04.043
Keywords
Trace element; Hooghly Estuary; Enrichments; Geo-accumulation; Pollution load; Sediment
Funding
- Scientific and Engineering Research Board, Department of Science and Technology, Govt. of India [SR/FT/LS-155/2011]
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Hooghly Estuary along with the Sunderban mangroves forms one of the most diverse ecosystems in the world. We investigated the vertical and horizontal distribution of elements at nine sampling locations in this estuary for assessing the degree of elemental contamination. The elemental concentrations were analyzed by an Energy Dispersive X-ray Flurosence spectrometer (EDXRF). A higher enrichment factor (EF) value of trace elements (V, Cr, Mn, Fe, Ni, Cu and Zn) is evident considering all the sampling locations. Geo-accumulation index (I-geo) values of all the sampling locations and core depth reveals Cr and Cu are under I-geo Class I level of contamination. The value of the pollution load index (PLI) varies between 0.94-1.65 with maximum at Chemaguri and minimum at Haldi Estuary and Petuaghat. The overall variation in elemental concentration may be due to differential discharge pattern of storm water and agricultural run-off, industrial effluent and domestic sewage. (C) 2016 Elsevier Ltd. All rights reserved.
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