| 胶州湾水生系统中痕量金属组分场态特征 |
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| 引用本文： | 叶思源,周永青 丁喜桂.胶州湾水生系统中痕量金属组分场态特征[J].中国地质,2006,33(5):1109-1117. |
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| 作者姓名： | 叶思源 周永青 丁喜桂 |
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| 作者单位： | 1. 青岛海洋地质研究所,山东,青岛,266071
2. 山东科技大学,山东,青岛,266510 |
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| 基金项目： | 中国重点海岸带滨海环境地质调查与评价项目 |
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| 摘 要： | 笔者利用宏量组分、微量组分、痕量金属组分的化学总量、环境因子等测试资料,深入讨论了胶州湾不同介质痕量金属的生物地球化学总体特征及各介质痕量金属组分在平面上的分布,揭示了胶州湾水生系统对陆源物质输入的响应。整个水生系统从垂向上看,表层沉积物是所有痕量金属组分的富集带;该系统中的生物相对于其所处水环境具有显著的富集痕量金属组分作用,生物体中Cu、Hg和As生物浓缩系数依次为1385、93和725。从横向上看,痕量金属组分化学场的研究揭示了痕量金属组分总量在底层水和沉积物介质中的分布主要受控于河口,即高值区分布于胶州湾的各个主要河口区,特别是沉积物中金属组分浓度的高值区主要集中分布于胶州湾的东部。而孔隙水中Cu的高值主要分布于水交替较弱的海域,如红岛前缘。但生物体中的痕量金属组分化学场空间分布规律与上述各介质的化学场均不吻合,亦即生物体中痕量金属组分的浓度与其所处环境中的同名金属组分浓度无关。生物对痕量金属组分的富集并不简单地取决于它所处环境介质中同名金属组分的总量,而存在形态上的选择性。并且通过回归分析揭示了底层水对生物体中Cu、Hg和As的富集贡献较大。
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| 关 键 词： | 痕量金属组分 底层水 孔隙水 沉积物 杂色蛤 水生系统 青岛胶州湾 |
| 文章编号： | 1000-36579（2006）05-1109-09 |
| 收稿时间： | 2005-10-17 |
| 修稿时间： | 2005-10-172005-12-19 |
Chemical field of trace metals in the aquatic system of the Jiaozhou Bay, Qingdao |
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| YE Si-yuan,ZHOU Yong-qing,DING Xi-gui.Chemical field of trace metals in the aquatic system of the Jiaozhou Bay, Qingdao[J].Chinese Geology,2006,33(5):1109-1117. |
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| Authors: | YE Si-yuan ZHOU Yong-qing DING Xi-gui |
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| Institution: | 1. Qingdao Institute of Marine Geology, CGS, Qingdao 266071, Shandong, China; 2. Shandong University of Science and Technology, Qingdao 266510, Shandong, Shandong, China |
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| Abstract: | By using the total chemical concentration of the macrocomponents, microcomponents and trace metal components as well as the environmental factors, the paper discusses in detail the general biogeochemical characteristics of trace metals in different media and areal distribution of trace metals of various media in the Jiaozhou Bay and reveals the response of the aqueous system of the bay to the terrestrial material input. Viewing the aquatic system as a whole, vertically, the surface sediments are the concentration zones of all trace metals and the organisms in the system have obvious bioaccumulation effect compared to their aquatic surroundings. The bioaccumulation factors of clams are 1385 for Cu, 93 for Hg and 725 for As. Laterally, the total amount of trace metals in both bottom water and sediments are mainly controlled by the proximity to the estuary, i.e. the high concentrations are generally distributed in various main estuaries in the Jiaozhou Bay. Especially, the high value areas of trace metals in the sediments mainly occur in the east of the Jiaozhou Bay. The high content of the metal Cu in pore water is mainly restricted in hydro-dynamically quiet areas, e.g. at the frontal edge of Hongdao Island. However, the distribution pattern of the chemical field of the trace metals in organisms such as clams is not coincident with that of the above-mentioned various media, i.e. the concentrations of trace metals in organisms are not related to the concentrations of the same metal in the ambient sediments or seawaters. Therefore, the authors believe that the accumulation of a given trace metal in organisms does not simply depend on the total amount of the given metal in the ambient media, but that there is selectivity. Organisms have their own choice to accommodate trace metals. Moreover, regression analysis shows that bottom water makes an appreciable contribution to the enrichment of Cu, Hg and As in organisms. |
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| Keywords: | trace metal bottom water pore water sediment variegated clam aquatic ecosystem Jiaozhou Bay Qingdao |
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