Trace metal enrichment and sediment quality in coastal-urban rivers along the Indian Ocean coast, Dar es Salaam, Tanzania

被引：0
作者：
Mhande Z. [1 ,2 ]
Mihale M.J. [1 ]
Hellar-Kihampa H. [1 ]
Brion N. [3 ]
Baeyens W. [3 ]
机构：
[1] Faculty of Science, Technology and Environmental Studies, The Open University of Tanzania, Dar es Salaam
[2] Tanzania Bureau of Standards, Dar es Salaam
[3] Analytical, Environmental and Geo-Chemistry Department (AMGC), Vrije Universiteit Brussel, Pleinlaan 2, Brussels
来源：
International Journal of Energy and Water Resources | 2023年 / 7卷 / 1期
关键词：
Coastal-urban rivers; Ecological risk; Indian Ocean; Sediment quality; Tanzania; Trace metals;
D O I：
10.1007/s42108-022-00212-1
中图分类号：
学科分类号：
摘要：
This study investigated sediments quality in coastal-urban rivers of Dar es Salaam, Tanzania along the Indian Ocean coast, that are strongly influenced by human activities. Sediment samples were seasonally collected from fifteen sites and one control location, treated as appropriate, and analyzed by high-resolution inductively coupled plasma mass spectrometer for Cd, Sn, Pb, Cr, Co, Ni, Cu, Al, Mn, Fe, and Zn. Concentrations ranged from 0.06 (Cd) to 92,479 (Al) mg/kg dry weight. Levels were higher during dry season than wet season. Cd, Sn, Pb, Co, Cr, and Zn were enriched in > 50% of the sites. Comparison with risk-based regulatory sediment quality thresholds depicted considerable ecological risk in > 70% of the sites. Evaluation by sediment quality indices identified two hotspots that require intervention. The highest contributors to the Risk Index were Pb and Cd (> 60%). These findings indicate risks to human health and river ecology that call for measures to protect the rivers from further contamination. © The Author(s), under exclusive licence to Iranian Society of Environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
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页码：119 / 132
页数：13
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