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首页> 外文会议>International Conference on Energy and Environmental Protection >Heavy metal sources and associated risk in response to rapid urbanization in surface sediments of Shantou Bay, South China
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Heavy metal sources and associated risk in response to rapid urbanization in surface sediments of Shantou Bay, South China

机译：汕头湾地表沉积物快速城市化的重金属来源和相关风险

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Shantou Bay in China is a good example of a site where human pressures and ecological values collide with each other. Twenty eight sediment samples collected from the bay were analyzed for grain size and geochemistry to reveal geochemical sources of selected metals and geochemical processes influencing their distribution, and to assess their enrichment and pollution in the sediments. Results showed that heavy metal concentrations in surface sediments varied from 0.7 mg/kg for Cd to 604.3 mg/kg for Mn. Four geochemical sources were identified as river input, runoff from city, sewage discharge and port pollution by the correlation analysis and principal component analysis. Hydrodynamic condition and input sources are major factors controlling the regional distribution of metals, reflected by a seaward decreasing pattern with some hotspots at the vicinity of river mouths and sewage outlets. Enrichment Factors reveal the anthropogenic sources for Cd, Cu, Zn and Pb. It is supported by the Geo-accumulation Index. The majority of the sediment samples can be occasionally and frequently associated to toxic biological effects, according to the effect-range classification for Cd, Cu, Pb and Zn.
机译：汕头湾在中国是一个人类压力和生态价值彼此碰撞的网站的一个很好的例子。分析了从海湾收集的二十八个沉积物样本，用于晶粒尺寸和地球化学，揭示了影响其分布的选定金属和地球化学过程的地球化学来源，并评估其在沉积物中的富集和污染。结果表明，表面沉积物中的重金属浓度从0.7mg / kg变化为Mn至604.3mg / kg。四个地球化学来源被确定为河流投入，城市径流，污水排放和港口污染通过相关性分析和主成分分析。流体动力学条件和输入来源是控制金属区域分布的主要因素，反映在河口附近的一些热点的海报减少模式反映。富集因子显示CD，Cu，Zn和Pb的人为源。它由地理累积指数支持。根据CD，Cu，Pb和Zn的效果范围分类，大多数沉积物样品可以偶尔和经常与有毒生物学作用相关。

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