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THE IMPACT OF FORMER MINING ACTIVITIES ON THE CONTAMINATION OF ALLUVIAL SOILS IN THE REGION HONT
Abstract
Nowdays, a degree of contamination by heavy metals can be observed in the environment. Heavy metals have serious effects on all living organisms because they can accumulate in lethal or sublethal concentrations in the various parts of food chain and so they can cause different health problems like cardiovascular, psychosomatic and cancer diseases. This work is focused to the rate of some risk elements contamination in agricultural alluvial soils from specific area of the region Hont ? alluvium of the river Stiavnica. The soils in alluvium of Stiavnica are strongly contaminated by heavy metals due to hundreds of years mine activities in region of Banska Stiavnica. The mobile forms of risk elements easily pass trough to the agricultural plants groving on contaminated soils. The soil samples were collected in the years 2015 - 2016 and the contents of cadmium, lead, zinc, copper and cobalt were analyzed by flame or graphite furnance atomic absorption spectrometry. The results showed that alluvial soils are strongly contaminated by Pb, Zn and Cd, moderately contaminated by Cu and slightly contaminated by Co. Therefore, such land should not be used for the cultivation of crops for food production or for animal feed.
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