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Orani, A.M., Vassileva, E., Wysocka, I., Angelidis, M., Rozmaric, M. and Louw, D. 2018. Baseline study on trace and rare earth elements in marine sediments collected along the Namibian coast. Marine Pollution Bulletin, 131(Part A): 386-395


Description:

Baseline study on trace and rare earth elements in marine sediments collected along the Namibian coast.

Summary / Notes:

Namibia is a fast-growing country with extensive mineral extraction activities used in diamond, fluorspar, uranium, and metals production. To assess the impact of land based human activities on the Namibian coastal marine environment, 25 elements were analyzed in 22 surface sediments samples collected along the coast. After applying a variety of pollution assessment indices (Enrichment Factor, Igeo and Pollution Load Indexes) was concluded that As, Cd and Sb were considerably enriched in the sediments from several sites, while Cu, Pb and Zn showed very high enrichment near the Walvis Bay harbor. Pearson's correlation and Principal Component Analysis were used to investigate common metal sources. Additionally, the determination of Pb isotope ratios confirmed the contribution of land based human activities at Walvis Bay and Lüderitz as sources of pollution. The analysis of REEs did not reveal any important enrichment due to anthropogenic activities, but provides a needed baseline for further investigations. Keywords: Benguela, Surface sediments, Trace elements, REEs, Pb isotope ratios.

Year: 2018

Type: Journal Article

URL: https://doi.org/10.1016/j.marpolbul.2018.04.021


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