Trace metal enrichment and organic matter sources in the surface sediments of Arabian Sea along southwest India (Kerala coast)
| Autor: | S.K. Mrudulrag, Eldhose Cheriyan, Athira Sreekanth, C. H. Sujatha |
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| Rok vydání: | 2015 |
| Předmět: |
Pollution
Geologic Sediments Oceans and Seas media_common.quotation_subject India Mineralogy Aquatic Science Oceanography Metals Heavy Cluster Analysis Trace metal Organic matter Precipitation Transect Humic Substances media_common chemistry.chemical_classification Principal Component Analysis Trace Elements Deposition (aerosol physics) chemistry Environmental chemistry Adsorption Clay minerals Water Pollutants Chemical Geology Environmental Monitoring |
| Zdroj: | Marine Pollution Bulletin. 101:938-946 |
| ISSN: | 0025-326X |
| Popis: | The geochemical distribution and enrichment of trace metals (Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn) were determined in the surface sediments of Arabian Sea, along southwest India, Kerala coast. The results of geochemical indices indicated that surficial sediments of five transects are uncontaminated with respect to Mn, Zn and Cu, uncontaminated to moderately contaminated with Co and Ni, and moderately to strongly contaminated with Pb. The deposition of trace elements exhibited three different patterns i) Cd and Zn enhanced with settling biodetritus from the upwelled waters, ii) Pb, Co and Ni show higher enrichment, evidenced by the association through adsorption of iron-manganese nodules onto clay minerals and iii) Cu enrichment observed close to major urban sectors, initiated by the precipitation as Cu sulfides. Correlation, principal component analysis (PCA) and cluster analysis (CA) were used to confirm the origin information of metals and the nature of organic matter composition. |
| Databáze: | OpenAIRE |
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