Distribution of heavy metals in sediments of Mwanza Gulf of Lake Victoria, Tanzania

被引：126
作者：
Kishe, MA
Machiwa, JF
机构：
[1] Tanzania Fisheries Res Inst, Mwanza, Tanzania
[2] Univ Dar Es Salaam, Dept Zool & Marine Biol, Dar Es Salaam, Tanzania
来源：
ENVIRONMENT INTERNATIONAL | 2003年 / 28卷 / 07期
关键词：
sediment; heavy metals; Mwanza Gulf; Lake Victoria; Tanzania;
D O I：
10.1016/S0160-4120(02)00099-5
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Sediment samples were analyzed for Cd, Cr, Cu, Pb, Hg and Zn by AAS. The highest concentrations (ppm) for Cu (26.1 +/- 4.8), Hg (0.2 +/- 0.05), Ph (30.7 +/- 5.6) and Zn (45.4 +/- 13.1) were found at approximately 25 in from the shoreline. Generally, heavy metals concentration in the sediment decreased with increasing distance from the shoreline except for Cd and Cr whose highest concentrations were found at approximately 2000 m from the shoreline. The data also indicated that sediment samples which were collected at the shores within the urban area of Mwanza showed elevated levels of Ph (54.6 +/- 11.1 ppm) and Zn (83.7 +/- 21.5 ppm). However, the highest concentrations of Cd (7.0 +/- 2.1 ppm), Cr (12.9 +/- 1.0 ppm) and Hg (2.8 +/- 0.8 ppm) were recorded at sampling stations which were adjacent to river mouths. (C) 2002 Elsevier Science Ltd. All rights reserved.
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收藏
页码：619 / 625
页数：7
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