Metal remobilisation during resuspension of anoxic contaminated sediment: short-term laboratory study
Metal remobilisation during resuspension of anoxic contaminated sediment: short-term laboratory study
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DOI：
10.1023/a:1022877120813
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发表时间：
2003-02-01
影响因子：
2.9
通讯作者：
Vale, C
中科院分区：
文献类型：
--
作者：
Caetano, M;Madureira, MJ;Vale, C
塔霍斯河口北海峡的沉积物具有高浓度的微量金属和单硫化物的特点。在疏浚作业期间，分析了疏浚点周围50至100米处收集的水中和悬浮沉积物中的Cd， Cu和Pb。两个组分的浓度随机波动：Cd和Cu为2-3倍，Pb为10倍。由于疏浚点的采样反映了快速化学反应的综合，因此进行了短期实验室实验，以跟踪发生在最高浑浊点的地球化学变化。在短时间间隔的4小时内，监测实验作为时间的函数。测定了浆液样品中的溶解氧、pH、EH、AVS、SO42-、Cl-和金属。测定了溶解馏分中的铁、锰、镉、铅和铜(
The sediments of the Tagus estuary North Channel are characterised by high concentrations of trace metals and monosulphides. During dredging operations Cd, Cu and Pb were analysed in water and suspended sediments collected 50 to 100 m around the dredging point. Concentrations in both fractions fluctuated randomly: 2-3 fold for Cd and Cu and 10 for Pb. Since sampling in the dredging point reflects integration of rapid chemical reactions, a short-term laboratory experiment was conducted to follow the geochemical alterations occurring in the highest turbidity sites. The experiment was monitored as a function of time over a period of 4 hr in short time intervals. Dissolved oxygen, pH, EH, AVS, SO42-, Cl- and metals were monitored in the slurry samples. Iron, Mn, Cd, Pb and Cu were determined in the dissolved fraction (