Distribution of heavy metals in sediments of Mwanza Gulf of Lake Victoria, Tanzania
Distribution of heavy metals in sediments of Mwanza Gulf of Lake Victoria, Tanzania
复制标题
DOI：
10.1016/s0160-4120(02)00099-5
复制
发表时间：
2003-01-01
影响因子：
11.8
通讯作者：
Machiwa, JF
中科院分区：
文献类型：
--
作者：
Kishe, MA;Machiwa, JF
通过 AAS 分析沉积物样品中的镉、铬、铜、铅、汞和锌。 Cu (26.1 +/- 4.8)、Hg (0.2 +/- 0.05)、Ph (30.7 +/- 5.6) 和 Zn (45.4 +/- 13.1) 的最高浓度 (ppm) 出现在距海岸线约 25 英寸处。一般来说，沉积物中的重金属浓度随着距海岸线距离的增加而降低，但镉和铬的浓度最高出现在距海岸线约 2000 m 处。数据还表明，在姆万扎市区海岸采集的沉积物样品中 Ph (54.6 +/- 11.1 ppm) 和 Zn (83.7 +/- 21.5 ppm) 含量升高。然而，镉（7.0 +/- 2.1 ppm）、铬（12.9 +/- 1.0 ppm）和汞（2.8 +/- 0.8 ppm）的最高浓度是在靠近河口的采样站记录到的。 (C) 2002 Elsevier Science Ltd. 保留所有权利。
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.