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Heavy metals, although present in soils in small amounts, are one of the most important elements determining fertile or toxic properties of habitats [10]. Their behaviour in soils depends largely on diff erent soil properties. One of the elementary factors in the mobility, concentration and distribution of heavy metals is soil pH [5, 9, 12]. An increase of soil pH causing the decreases of solubility of most of heavy metals. Their concentration is lower in alkaline soil solutions and their mobility decrease according to order: Cd > Ni > Zn > Mn > Cu > Pb [1, 12]. However, as it is noticed by Adamczyk-Szabela et al. [1], increase of soil pH not in all cases reduces the quantity of bioavailable heavy metals. This subject was taken due to the lack of comprehensive research and data regarding the levels of heavy metals in alkaline soda sediments and formations overlying such waste material. As a part of the research, samples from the sediment ponds on the former “Solvay” Krakow Soda Works were analysed for the presence of selected elements from the group of heavy metals.

geomatics and environmental engineering

The Content of Selected Heavy Metals of the Sediment and Soil Overburden Overlying Alkaline Sodium Waste on the Basis of the Sett ling Tanks of the Former “Solvay” Krakow Soda Works.