Geochemistry of Major and Trace Elements in Sediments of the Ria de Vigo (NW Spain): an Assessment of Metal Pollution ☆
Geochemistry of Major and Trace Elements in Sediments of the Ria de Vigo (NW Spain): an Assessment of Metal Pollution ☆
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DOI：
10.1016/s0025-326x(00)00039-4
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发表时间：
2000-11
影响因子：
5.8
通讯作者：
B. Rubio;M. Nombela;F. Vilas
中科院分区：
文献类型：
--
作者：
B. Rubio;M. Nombela;F. Vilas
比戈湾（西班牙语：Ria de Vigo）是西班牙加利西亚省的一个漏斗状的海岸海湾。沿其边缘沿着有一些重要的人口和工业活动中心，这些中心是污染源。在里亚收集了66个潮下带沉积物样本。对样品进行了全消化技术，并分析了主要和微量元素（Al、Fe、Ti、Mn、Cu、Pb、Cr、Zn、Co、As、Ni、Cd和Sr）。绝对金属浓度的变化反映了结构和/或碳酸盐和有机物含量的变化。计算了地质累积指数和富集系数，以评估观测到的浓度代表背景浓度还是污染水平。实践证明，背景的选择对地球化学资料的解释起着重要的作用。主成分分析是确定Ria de Vigo地区金属背景值的一个非常有用的工具。这些值与其他作者给出的区域值相似。它的结论是，RIA是轻微到中度污染的一些研究的金属。对污染的空间范围进行了检查，发现污染最严重的地区位于里亚的内部和南部。
Ria de Vigo is a funnel-shaped, fault-bounded coastal embayment in Galicia, NW Spain. There are a number of important centres of population and industrial activity along its margins, which serve as sources of pollution. Sixty-six subtidal sediment samples have been collected in the Ria. The samples have been subjected to a total digestion technique and analysed for major and trace elements (Al, Fe,Ti, Mn, Cu, Pb, Cr, Zn, Co, As, Ni, Cd and Sr). Variations of absolute metal concentrations reflected variations in textural and/or carbonate and organic matter content. Geoaccumulation indexes and enrichment factors have been calculated to assess whether the concentrations observed represent background or contaminated levels. It is proved that the choice of the background plays an important role in the interpretation of the geochemical data. PCA was a very useful tool to define background values for metals in the Ria de Vigo area. These values were similar to regional values given by other authors. It is concluded that the Ria is slightly to moderately polluted for some of the studied metals. The spatial extent of pollution was examined, and it was found that the most polluted area is located in the inner and southern parts of the Ria.