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Pollution in the Bay of Bengal: Impact on Marine Ecosystem
Department of Geography and Environment, University of Dhaka, Dhaka, Bangladesh
Department of Soil, Water and Environment, University of Dhaka, Dhaka, Bangladesh
Department of Geography and Environment, University of Dhaka, Dhaka, Bangladesh
- 1 Department of Geography and Environment, University of Dhaka, Dhaka, Bangladesh
- 2 Department of Soil, Water and Environment, University of Dhaka, Dhaka, Bangladesh
- 3 Department of Geography and Environment, University of Dhaka, Dhaka, Bangladesh
Open Journal of Marine Science·Volume 05 (2014)·Pages 55–63·Published 22 December 2014·DOI10.4236/ojms.2015.51006
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Abstract
The study focused on heavy metal concentration in sea water, sea sediment and their toxic effect on sea shells, and on oyster along the east coast of the Bay of Bengal. The hierarchy of heavy metals in sea sediment of the bay showed as: Fe > Zn > Ni > Cr > Pb > Cd. The average concentration of nickel exceeded ERL (20.9 μg · g - 1 ) value and the incidence of adverse effects on biological components exceeded 16.7%. The present study showed that the concentration of Cd, Fe, Pb and Cu in sea water were relatively higher than the standard concentration. The study showed a considerable amount of heavy metals (0.035%) such as Zn, Pb, Cu, Fe, and Mg in sea shells, and oyster which may make them toxic. The toxic effect of Pb and Zn may reduce their growth which is a great threat to marine ecosystem.
KeywordsBay of BengalHeavy MetalEffects Range-Low (ERL)Effects Range-Medium (ERM)Marine Organisms
- Bourgoin, B.P. (1990) Mytilus Edulis Shell as a Bioindicator of Lead Pollution: Considerations on Bioavailability and Variability. Marine Ecology Progress Series, 61, 253-262.
- Shyamol, N. (2012) Pollution Rises in Bay of Bengal. Unpublished Thesis, Dhaka.
- Mizanur, M.R. (2006) A Study on Coastal Water Pollution of Bangladesh in the Bay of Bengal. http://hdl.handle.net/10361/215
- Das, B., Khan, Y.S.A. and Sarker, M.A.K. (2002) Trace Metal Concentration in Water of the Karnaphuli River Estuary of the Bay of Bengal. Pakistan Journal of Biological Sciences, 5, 607-608. http://dx.doi.org/10.3923/pjbs.2002.607.608
- Sharif, A.K.M., Bilkis, A.B., Roy, S., Silder, M.D.H., Aliidriss, K.M. and Safiullah, S. (1993) Concentration of Radionuclides in Coastal Sediments from the Bay of Bengal. An Institute of Nuclear Science and Technology, Atomic Energy Research Establishment, Savar.
- Saha, S.B., Mitra, A., Bhattacharyya, S.B. and Choudhury, A. (2001) Status of Sediment with Special Reference to Heavy Metal Pollution of a Brackishwater Tidal Ecosystem in Northern Sundarbans in West Bengal. Tropical Ecology, 42, 127-132.
- Long, E.R., Smith, S.L. and Calder, F.D. (1995) Incidence of Adverse Biological Effects within Ranges of Chemical Concentrations in Marine and Estuarine Sediments. Environmental Management, 19, 81-97. http://dx.doi.org/10.1007/BF02472006
- Thomlinson, D.L., Wilson, J.G., Harries, C.R. and Jeffney, D.W. (1980) Problems in the Assessment of Heavy Metal Levels in Estuaries and the Formation of a Pollution Index. Helgolander Wissenschaftliche Meeresuntersuchungen, 33, 566-572. http://dx.doi.org/10.1007/BF02414780
- Turkian, K.K. and Wedephol, K.H. (1961) Distribution of the Elements in Some Major Units of the Earth’s Crust. Bulletin of the Geological Society of American, 72, 175-178. http://dx.doi.org/10.1130/0016-7606(1961)72[175:DOTEIS]2.0.CO;2
- Frank, F.R., Ray, E. and Swanson, M.H. (1964) The Relationships among Shell Membrane, Selected Chemical Properties, and the Resistance to Shell Failure of Gallus Domesticus Eggs. Poultry Science Association, Oxford University Press, UK.
- Jayaraju, N., Sundara, R., Reddy, B.C. and Reddy, K.R. (2009) Metal Pollution in Coarse Sediments of Tuticorin Coast, Southeast Coast of India. Environmental Geology, 6, 1205-1209. http://dx.doi.org/10.1007/s00254-008-1220-5
- Chakraborty, R. (2003) Accumulation of Heavy Metals in Some Freshwater Fishes from Eastern India and Its Possible Impact on Human Health. Pollution Research, 22, 353-358.