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Orani, A.M., Vassileva, E., Renac, C., Schmidt, S., Angelidis, M.O., Rozmaric, M. and Louw, D. 2019. First assessment on trace elements in sediment cores from Namibian coast and pollution sources evaluation. Science of The Total Environment, 669: 668-682


Description:

First assessment on trace elements in sediment cores from Namibian coast and pollution sources evaluation.

Summary / Notes:

Trace elements (TEs), Rare Earth Elements (REEs) and Pb isotope ratios were determined in six small cores sampled along the Namibian coast and different indices, such as Enrichment Factor, Geo-accumulation Index and Pollution load index, were calculated to evaluate possible metal contamination in the area. Concentrations of Pb, Cu, As and Cd were strongly enhanced at the upper 7 cm of core C5, which is located at Walvis Bay, at the major harbor and urban/industrial center of Namibia, indicating the impact from the recent anthropogenic activities. Principal Component Analysis was applied to the data set indicating possible common sources of the contaminants. Pb stable isotope ratios, combined with the dating of core C5 at Walvis Bay, further confirmed the anthropogenic provenance of Pb sources in the recent sediment deposits, which occurred after 1945, when the anthropogenic activities in the area began to increase. REEs profiles were also determined, showing enrichment in REEs for some of the samples, typical for the minerals present in the area. Ce anomaly was detected in one of the cores but the REEs profile did not reveal anomalies ascribable to anthropogenic influence. Keywords: Trace elements, Rare Earth Elements, Lead isotope ratios, Sediment core, Pollution history, Namibian coast.

Year: 2019

Type: Journal Article

URL: https://doi.org/10.1016/j.scitotenv.2019.03.059


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