Abstract
The article presents the results of assessment of heavy metals contamination in bottom sediments of saline lakes located on the territory of Kulunda and Barabinsk steppes of Western Siberia, Russia. The territory is characterized by large amount of lakes (more than 5000), including the Chany lake, which is the biggest lake of south of Western Siberia. By calculation the geochemical parameters, such as Enrichment factor, Contamination factor, Geoaccumulation index, Pollution load index, the common level of bottom sediments was classified as unpolluted. However, in comparison with average level of bottom sediment on that territory the lake sediments are enriched with the following elements: Sr> Rb> Zn> V> Cr> Ni> Cu> As> Pb> Th> U> Mn> Fe> K> Ti.
Highlights
According to [1], chemical elements from natural and anthropogenic sources can flow into aquatic ecosystems directly or through the atmosphere, while creating certain geochemical conditions of the environment that can accumulate or remove heavy metals from the system
The contents of trace elements were analyzed on an Agilent 7500a ICP MS at the Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences; Li was determined using a Varian AA 280 FS spectrometer
Enrichment factor (EF) was calculated as a ratio of element normalized concentrations between studied sample and reference data [4] by following equation [5]: EEEE =, (CFCFnFnF)ssssssssssssssss (CFCFnFnF)rrrrrrrrrrrrrrrrrr where Cn is a concentration of chemical element n in bottom sediments
Summary
According to [1], chemical elements from natural and anthropogenic sources can flow into aquatic ecosystems directly or through the atmosphere (for example, as a result of agro-economic work), while creating certain geochemical conditions of the environment that can accumulate or remove heavy metals from the system. Particular attention in connection with the pollution of heavy metals requires water bodies, the catchment area of which includes industrialized areas. The main substances that cause pollution of surface water in recent years remain sulfates, chlorides, general phosphorus, ammonium nitrogen, nitrates, fats, petroleum products, general iron and phenols volatile. It is possible to add chemical oxygen consumption 2-3 times higher than maximum permissible standards
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