Abstract

The composition and speciation of trace elements were studied in surface and interstitial waters along with solid phase of bottom sediments to characterize the abiotic segment of the Pirogovo Reservoir. It was found that the concentrations of metals in surface waters did not exceed the MACs for fishery basins, excluding Zn and Cu (2–9 and up to 2 MACs, respectively). According to thermodynamic calculations, the predominant metal speciation in water is free ions (Sr, Ba, Zn, Ni, Co, and Cd), as well as fulvate and carbonate complexes of Cu and Pb, respectively. Interstitial waters showed a regular increase of the fraction of the sulfate complexes of trace elements in loamy sediments. The solid phase of the latter as well was characterized by low anomalous concentrations of Zn, Cd, Co, and Ni. According to the data of extraction, the metals were either fixed in bottom sediments within crystal structure of silicates or bound to oxides and hydroxides of iron and manganese, excluding Cd and Mn, which are characterized by a considerable role of their exchangeable and bound to carbonates fraction in the particulate matter.

中文翻译：

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Pirogovo水库水和底泥中微量元素的形态

摘要

研究了表层和间隙水以及底部沉积物的固相中微量元素的组成和形态，以表征Pirogovo水库的非生物部分。结果发现，除了锌和铜（分别为2–9和最多2个MAC）外，地表水中金属的浓度均未超过渔业流域的MAC。根据热力学计算，水中主要的金属形态是自由离子（Sr，Ba，Zn，Ni，Co和Cd）以及分别为Cu和Pb的富勒酸盐和碳酸盐络合物。间隙水表明，壤质沉积物中微量元素的硫酸盐配合物含量有规律地增加。后者的固相也以低浓度的Zn，Cd，Co和Ni为特征。根据提取的数据，