| Geochemical assessment of metal concentrations in sediment core of Korangi Creek along Karachi Coast, Pakistan. | |
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MedLine Citation:
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PMID: 23279880 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Sediment core from Korangi Creek, one of the polluted coastal locations along the Karachi Coast Pakistan, was collected to trace the history of marine pollution and to determine the impact of industrial activity in the area. Down core variation of metals such as Ca, K, Mg, Al, S, Ti, V, Cr, Mn, Fe, Ni, Cu and Zn was studied in the 72.0 cm core. Nuclear analytical techniques, proton induced X-rays emission (PIXE), was employed to ascertain the chemical composition in sediment core. Grain size analysis and sediment composition of cored samples indicated that Korangi creek sediments are clayey in nature. Correlation matrix revealed a strong association of Ni, Cu, Cr and Zn with Fe and Mn. To infer anthropogenic input, enrichment factor (EF), degree of contamination and pollution load index were calculated. EF showed severe enrichment in surface sediment for Ni, Cu, Cr and Zn, indicating increased industrial effluents discharge in recent years. The study suggests that heavy metal discharge in the area should be regulated. If the present trend of enrichment is allowed to continue unabated, it is most likely that the local food web complexes in the creek might be at highest risk. |
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Authors:
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M Z Chaudhary; N Ahmad; A Mashiatullah; N Ahmad; A Ghaffar |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-3 |
Journal Detail:
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Title: Environmental monitoring and assessment Volume: - ISSN: 1573-2959 ISO Abbreviation: Environ Monit Assess Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508350 Medline TA: Environ Monit Assess Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Isotope Geochemistry Laboratory, Isotope Application Division, PINSTECH Islamabad, Islamabad, Pakistan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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