Heavy metal concentrations in water and sediments in Tasik Chini, a freshwater lake, Malaysia
Heavy metal concentrations in water and sediments in Tasik Chini, a freshwater lake, Malaysia
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DOI：
10.1007/s10661-007-9896-7
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发表时间：
2008-06
影响因子：
3
通讯作者：
M. Ebrahimpour;I. Mushrifah
中科院分区：
文献类型：
--
作者：
M. Ebrahimpour;I. Mushrifah
本文的目的是测定水和沉积物中重金属镉（Cd）、铜（Cu）和铅（Pb）的浓度；考察沉积物pH值和沉积物有机质对氧化段沉积物中镉、铜、铅浓度的影响。为此目的，测定了马来西亚半岛扎西克的15个地点的水和沉积物中的重金属浓度。在本研究中使用的顺序提取程序是基于定义的馏分：交换，酸还原，氧化和残余。残留馏分中重金属含量高于其他馏分。在非残留馏分中，有机质馏分中重金属含量均明显高于其他馏分。所有地点沉积物的pH值均为酸性。平均pH值在4.8至5.5之间，在15号地点观测到较高的pH值。有机质分析结果表明，沉积物样品中有机质含量在全湖范围内存在差异，各样点有机质含量均相对丰富，在13.0% ~ 34.2%之间。采样点15的平均有机质含量最高，为31.78%。
The purpose of this paper are to determine the concentration of heavy metals namely cadmium (Cd), copper (Cu) and lead (Pb) in water and sediment; and to investigate the effect of sediment pH and sediment organic matter on concentration of cadmium, copper and lead in sediment at oxidation fraction. For this purpose the concentration of heavy metals were measured in water and sediments at 15 sites from Tasik Chini, Peninsular Malaysia. The sequential extraction procedure used in this study was based on defined fractions: exchangeable, acid reduction, oxidation, and residual. The concentration of heavy metals in residual fraction was higher than the other fractions. Among the non-residual fractions, the concentration of heavy metals in organic matter fraction was much higher than other fractions collected from all sampling sites. The pH of the sediment in all sites was acidic. The mean pH ranges from 4.8 to 5.5 with the higher value observed at site 15. Results of organic matter analysis showed that the percentage of organic matter present in sediment samples varies throughout the lake and all sites of sediments were relatively rich in organic matter ranging from 13.0% to 34.2%. The highest mean percentage of organic matter was measured at sampling site 15, with value of 31.78%.