title: Chemometric study on the trace metal accumulation in the sediments of the Cochin Estuary--Southwest coast of India.
abstract: The distribution and accumulation of trace metals in the sediments of the Cochin estuary during the pre-monsoon, monsoon and post-monsoon periods were investigated. Sediment samples from 14 locations were collected and analysed for the metal contents (Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb), organic carbon, total nitrogen, total sulphur and grain size. The data were processed using statistical tools like correlation, factor and cluster analysis. The study revealed an enrichment of Cd and Zn in the study area particularly at station 2, which is confirmed by enrichment factor, contamination factor and geoaccumulation index. The factor analysis revealed that the source of Cd and Zn may be same. The study indicated that the spatial variation for the metals like Mg, Cr, Fe, Co, Ni, Cu, Zn, Cd and Pb were predominant unlike Mn which shows a temporal variation. The strong association of trace metals with Fe and Mn hydroxides and oxides are prominent along the Cochin estuary. The anthropogenic inputs of industrial effluents mainly control the trace metals enrichment in the Cochin estuary.
authors.affiliation: Department of Chemical Oceanography, School of Marine Sciences, CUSAT, Kochi 682516, India. dlpmchem@gmail.com
authors.forename: P M
authors.initials: PM
authors.lastname: Deepulal
authors.forename: T R Gireesh
authors.initials: TR
authors.lastname: Kumar
authors.forename: C H
authors.initials: CH
authors.lastname: Sujatha
authors.forename: Rejomon
authors.initials: R
authors.lastname: George
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D007194:India; D008670:Metals / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical
references.citation: Sci Total Environ. 2005 Jan 20;337(1-3):91-107
references.pmid: 15626382
references.citation: Chemosphere. 2006 Dec;65(11):2114-21
references.pmid: 16875712
references.citation: Environ Int. 2006 Feb;32(2):165-73
references.pmid: 16194570
references.citation: Chemosphere. 2004 Jun;55(10):1323-9
references.pmid: 15081775
references.citation: Environ Pollut. 2001;113(2):211-9
references.pmid: 11383338
references.citation: Environ Int. 2004 Feb;29(8):1019-28
references.pmid: 14680884
references.citation: Environ Int. 2004 Jan;29(7):935-48
references.pmid: 14592571
references.citation: Chemosphere. 2003 Jun;51(8):723-33
references.pmid: 12668031
references.citation: Sci Total Environ. 2004 Sep 1;330(1-3):249-69
references.pmid: 15325172
references.citation: Chemosphere. 2000 Nov;41(9):1411-7
references.pmid: 11057578
references.citation: Mar Pollut Bull. 2007 Jul;54(7):974-82
references.pmid: 17433373
references.citation: J Hazard Mater. 2006 Apr 30;132(1):80-9
references.pmid: 16466857