A geochemical and statistical approach for assessing heavy metal pollution in sediments from the southern Caspian coast
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The nearshore marine environment of the Caspian sea is a major repository for toxic metals originating from various sources. Since the persistent toxic metals pose serious health risks this research concentrated on investigating the concentrations and spatial distribution of metals in the nearshore sediments along the Iranian coast of the Caspian sea. Fourteen sampling sites were selected along the coast and approximately 400 g of surficial sediments were obtained. Samples were sieved and three grain size fractions from each sample plus fourteen bulk samples were selected for the analysis of metals. Laboratory analysis of the samples utilized the Cold Acetic protocol, followed by Inductively coupled plasma optical emission spectroscopy. The statistical techniques were used to analyze all obtained data. Linear regression analysis demonstrated that grain size of the sediments was not a major factor controlling the concentrations and spatial distributions of heavy metals. Box and Whisker plots emphasized that metal concentrations were not homogeneously distributed. Discriminant analysis was also proved to be useful in identifying geographic areas where heavy metal concentrations occur along the coast.
KeywordsCaspian sea discriminant analysis heavy metals marine environment nearshore sediments
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- Balls, P.W.; Hull, S.; Miller, B.S.; Pirie, J.M.; Proctors, W., (1977). Trace metals in Scottish estuarine and coastal sediments. Mar. Pollut. Bull., 47, 42–50.Google Scholar
- Buchholtz ten Brink, M.; Bothner, M.H.; Manheim, F.T.; Butman, B., (1997). Contaminant metals in coastal marine sediments: A legacy for the future and a tracer of modern sediment dynamics’, Proc. of the U.S. Geological Survey Sediment Workshop, 4–7 February.Google Scholar
- Caspian Environment Programme, Caspian Sea, Environmental Issues (Iran). http://www.caspianenvironment.org/newsite/Caspian-EnvironmentalIssues.htm (accessed May 5, 2006).
- Din, Z.B., (1994). Natural and anthropogenic trace metal input into the coastal and estuarine sediments of the Straits of Malacca. Bull. Environ. Contam. Toxicol. 55, 666–673.Google Scholar
- Energy Information Administration, Caspian Sea Region: Environmental Issues. February, 2003 (United States) http://www.eia.doe.gov/emeu/cabs/caspenv.html#stats (accessed May 5, 2006).
- Förstner, U.; Calmano, W.; Schoer, J., (1982). Metals in sediments from the Elbe, Weser and Ems estuaries and from the German Bight: Grain size effects and chemical forms. Thalassia Jugosl. 12, 30–36.Google Scholar
- GLIER, (1996). Great Lakes Institute for Environmental Research Laboratory Manual, Revised March 22, 1996, Section 4.10, University of Windsor, Windsor, ONTARIO.Google Scholar
- Huberty, C.J., (1994). Applied Discriminant Analysis. Wiley-Interscience, New York.Google Scholar
- Johnston, R.J., (1992). Multivariate Statistical Analysis in Geography. John Wiley and Sons, New York.Google Scholar
- Kajiwara, N.; Niimi, S.; Watanabe, M.; Ito, Y.; Takahashi, S.; Tanabe, S.; Khuraskin, L.S.; Miyazaki, N., (2002). Organochlorine and organotin compounds in Caspian seals (Phoca caspica) collected during an unusual mortality event in the Caspian Sea in 2000. Environ. Pollut., 117, 391–402.CrossRefGoogle Scholar
- Lakhan, V.C.; Cabana, K.; LaValle, P.D., (2003). Relationship between grain size and heavy metals in sediments from beaches along the coast of Guyana. J. Coast. Res., 19(3), 600–608.Google Scholar
- McLachlan, G.J., (2004). Discriminant Analysis and Statistical Pattern Recognition. Wiley-Interscience, New York.Google Scholar
- McMurtry, G.M.; Wiltshire, J.C.; Kauhikaua, J.P., (1995). Heavy metal anomalies in coastal sediments of O’ahu Hawaii. Pacific Sci., 49(4), 452–470.Google Scholar
- Motavalli, J., (1999). Black gold-Caspian Sea oil development. Environ. Manage., 10(6).Google Scholar
- Neville, R., (2006). Environmental Protection in the Caspian Sea: Policy Constraints and Prescriptions. International Institute for Caspian Studies. http://www.caspianstudies.com/article/RachelNevil.htm (accessed May 4, 2006)
- Statistical Package for the Social Sciences (SPSS, Inc.), (2003). Version 13 for Windows. SPSS, Inc., Chicago, IL.Google Scholar
- StatSoft, Inc., (1997). Statistica for Windows (Computer Program Manual). StatSoft, Inc., Tulsa, OK.Google Scholar
- Tolosa, I.; de Mora, S.J.; Sheikholeslami, M.R.; Villeneuve, J.-P.; Bartocci, J.; Cattini, C., (2004). Aliphatic and aromatic hydrocarbons in coastal Caspian Sea sediments. Mar. Pollut. Bull., doi:10.1016/S0025-326X(03)00255-8.Google Scholar
- Uriarte, A.; Franco, J.; Borja, A.; Valencia, V.; Castro, R., (1998). Sediment and heavy metal distribution and transport in a coastal area affected by a submarine outfall in the Basque Country (Northern Spain). Water Sci. Tech., 37(6–7), 55–61.Google Scholar