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Chemical Forms of Heavy Metals in Bottom Sediments of the Mitr?ga Reservoir

机译：Mitr？ga水库底部沉积物中重金属的化学形式

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Bottom sediments originating from the Mitr?ga water reservoir were studied. It was assayed, in what chemical forms heavy metals (zinc, copper, nickel, cadmium and lead) occur in sediments, using the method of sequential extraction BCR. According to the geochemical criteria with respect to the content of Zn, Cu and Ni, the sediments in all measuring points were classified as uncontaminated, however because of the Cd content - as moderately contaminated. The highest Cu and Ni content was found in the sediment collected in the southern part of the reservoir, 15 and 11 mg/kg d.m, respectively. In the case of Zn, Pb and Cd, the sediment collected at the outflow of the Mitr?ga river was the most contaminated; metal content amounted to 136; 35; 3 mg/kg d.m., respectively. Based on the conducted fractionation of heavy metals, it was found that the potential mobility of metals, hence the possibility of secondary pollution of the reservoir open water, are arranged in the following order: Zn> Cd> Ni> Cu ~ Pb.
机译：研究了来自Mitr？ga水库的底部沉积物。使用顺序萃取BCR方法分析了沉积物中以什么化学形式形成重金属（锌，铜，镍，镉和铅）。根据关于Zn，Cu和Ni含量的地球化学标准，所有测量点的沉积物都被归类为未污染，但是由于Cd含量，其被归为中等污染。在水库南部收集的沉积物中发现最高的Cu和Ni含量，分别为15和11 mg / kgd.m。以锌，铅和镉为例，在米特尔加河流出处收集的沉积物污染最严重。金属含量为136; 35;分别为3 mg / kg d.m.。基于重金属的分级分离，发现金属的潜在迁移率，因此有可能对储层露天水造成二次污染，其排列顺序为：Zn> Cd> Ni> Cu〜Pb。

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