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dc.contributor.authorVeerasingam, S.
dc.contributor.authorVenkatachalapathy, R.
dc.contributor.authorRamkumar, T.
dc.date.accessioned2014-05-06T11:35:50Z
dc.date.available2014-05-06T11:35:50Z
dc.date.issued2014
dc.identifier.citationEnvironmental Earth Sciences, vol.71(9); 2014; 3963–3975.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4532
dc.description.abstractGeochemical, mineralogical and textural analyses were carried out in core sediments off Adyar estuary, Bay of Bengal, India to record the contamination trend from urban and industrial activities during the historical past. Quartz, feldspar, kaolinite, chlorite and illite were the main lithogenic and clay minerals; carbonate was the predominant biogenic mineral. Trace metals (Fe, Al, Cu, Cr, Ni, Pb and Zn) indicate more enrichment in the surface sediment layers due to recent anthropogenic activities. The mean anthropogenic factor (AF) values for trace metals in core sediments decreased in the following order: Cr > Ni > Zn > Cu > Pb. The pollution load index (PLI) values in Adyar core sediments ranged from 1 to 1.25 with an average of 1.07. Based on AF, PLI, and sediment quality guidelines values for trace metals, significant metal enrichment and ecological risk were obtained in upper-most sediment layer. Multivariate statistical methods such as correlation matrix, principal component analysis and cluster analysis were carried out to find the relationships among the texture size, metals and minerals. The pollution of Adyar estuarine sediments was started in the 1960s, responding to the rapid economic development in Chennai coastal and Adyar estuarine region in the last five decades. Despite these high concentrations in the upper layer, development and expansion of industries are still continuing. The stricter regulations for the discharge and remediation of sediments are urgent for the conservation of environments and human health.
dc.language.isoen
dc.publisherSpringer
dc.rightsAn edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2013] Springer.
dc.subjecttrace metals
dc.subjectsediments
dc.subjectclay minerals
dc.subjectpollution
dc.titleHistorical environmental pollution trend and ecological risk assessment of trace metals in marine sediments off Adyar estuary, Bay of Bengal, India.
dc.typeJournal Article


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