Geochemical characteristics of heavy metal pollution in surface sediments of the Tinto and Odiel river estuary (southwestern Spain)
Geochemical characteristics of heavy metal pollution in surface sediments of the Tinto and Odiel river estuary (southwestern Spain)
复制标题
DOI：
10.1007/s00254-001-0445-3
复制
发表时间：
2002-03-01
期刊：
影响因子：
--
通讯作者：
Grande, JA
中科院分区：
文献类型：
--
作者：
Borrego, J;Morales, JA;Grande, JA
对 Tinto 和 Odiel 河口的 52 个表层沉积物样品的地球化学成分研究表明，Fe (11.21%)、Cu (928 ppm)、Zn (1,146 ppm)、Pb (730 ppm) 和 Ba (660 ppm) 的浓度很高。高浓度金属是由来自采矿活动频繁地区和河口岸进行的工业活动的沉积物对河流的贡献造成的。河口沉积物分为四类：第一类，由低污染的硅质碎屑砾石和砂组成；第2组河流来源的高度污染泥质沉积物；组3由混合成因的砂质泥形成，污染程度中等；组4由系统内部的泥质沉积物形成，污染程度为中高。在所有情况下，除 Fe 外，金属富集系数都很高（优于 9），表明负载金属污染物具有较高的分散能力。
The study of the geochemical composition of 52 samples of surface sediments from the Tinto and Odiel river estuary shows high concentration rates of Fe (11.21%), Cu (928 ppm), Zn (1,146 ppm), Pb (730 ppm) and Ba (660 ppm). High concentrations of metals are caused by the river contribution of sediments from areas with a high mining activity and from the industrial activity carried out on the estuary banks. Estuary sediments are divided into four groups: group 1, formed by low polluted siliciclastic gravel and sand; group 2 of highly polluted muddy sediments of river origin; group 3, formed by sandy muds of mixed origin with an average pollution rate, and group 4, formed by muddy sediments from the system's inner zones with an intermediate-high pollution rate. In all the cases the coefficients of metallic enrichment are high (superiors at 9), except for the Fe, indicating a high capacity of dispersion of the load metallic pollutant.