斯里兰卡南部Kalametiya泻湖表层沉积物中重金属的空间分布:污染状况及其社会经济相互作用[p];

IF 0.4 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
K.A.S. Kodikara, T. Hoessein, P.M.C.S. De Silva, P. Ranasinghe, H.P.P.S. Somasiri, S.K. Madarasinghe, D.U.V. Gunathilake, D. Ranawaka, M. Danaee, J. Andrieu, F. Dahdouh-Guebas
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引用次数: 0

摘要

重金属污染已成为沿海水生生态系统的严重威胁。因此,本研究旨在评估斯里兰卡南部卡拉梅提亚泻湖表层沉积物样品中砷(As)、镉(Cd)、铬(Cr)、铅(Pb)和汞(Hg)五种重金属/类金属的空间分布。对泻湖的16个区域进行了采样。采用ICP-MS对沉积物样品进行重金属含量分析,对水样进行盐度和ph测量,并对泻湖可能的重金属污染源进行问卷调查。湖水的pH值和盐度在整个泻湖中表现出显著的变化。pH和盐度的总体平均值分别为6.68±0.17和2.9±2.2 PSU。重金属的空间分布并不单调,呈现出较高的空间变异性。测量的重金属核密度图在泻湖中划定了几个空间上不同的斑块。As、Cd、Cr、Hg和Pb的平均水平低于阈值效应水平(TEL),但北部入口的Hg高于阈值效应水平。但仍低于潜在效应水平(PEL)。工业污水、河流悬浮沉积物以及化肥和农药等农用化学品被确定为重金属负荷的可能来源。通过绕过流入泻湖的淡水,可以最大限度地减少有毒重金属的积累。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatial distribution of heavy metals in surface sediments of the Kalametiya Lagoon in southern Sri Lanka: Insights into the pollution status and socio-economic interactions 
Heavy metal pollution has become a serious threat to coastal aquatic ecosystems. Therefore, this study, aimed to assess the spatial distribution of five selected heavy metals/metalloids, arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), and mercury (Hg), in surface sediment samples collected from the Kalametiya Lagoon in southern Sri Lanka. Sixteen (16) areas of the lagoon were sampled. The sediment samples were analysed for heavy metal content by using ICP-MS while the water samples were measured for salinity and pH. A questionnaire survey was conducted to investigate the possible sources of heavy metal pollution in the Lagoon. Water pH and salinity showed significant variations across the lagoon. The overall mean value of pH and salinity were 6.68 ± 0.17 and 2.9 ± 2.2 PSU, respectively. The spatial distribution of the heavy metals was not monotonous and showed a high spatial variation. The kernel density maps of the measured heavy metals demarcated several spatially different patches in the lagoon. The mean levels of As, Cd, Cr, Hg, and Pb were lower than the threshold effect level (TEL) although it was higher for Hg in the North inlet. Nevertheless, it was still lower than the potential effect level (PEL). Industrial sewage, river suspended sediments, and agrochemicals such as fertilizers and pesticides were identified as the possible sources for heavy metal loads. Accumulation of toxic heavy metals can be minimized by by-passing the freshwater inflow to the lagoon.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
57
审稿时长
>12 weeks
期刊介绍: The Journal of National Science Foundation of Sri Lanka (JNSF) publishes the results of research in Science and Technology. The journal is released four times a year, in March, June, September and December. This journal contains Research Articles, Reviews, Research Communications and Correspondences. Manuscripts submitted to the journal are accepted on the understanding that they will be reviewed prior to acceptance and that they have not been submitted for publication elsewhere.
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