Content of Heavy Metals and Their Fractions in Organic Soils of Podlasie
 
 
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Department of Environmental Engineering Technology and Systems, Bialystok University of Technology, Wiejska 45A, 15-351 Białystok, Poland
Publish date: 2019-03-01
 
J. Ecol. Eng. 2019; 20(3):179–184
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ABSTRACT:
The purpose of this study was to determine the total content of cadmium, lead, nickel, copper, zinc and their fractions in organic soils of Podlasie used as permanent grassland. The research material were samples taken from 30 soils of the Podlasie province in 2011-2013. Samples were taken from determined layer to depth of 0-30 cm. In taken soil samples basic physicochemical properties were determined: organic carbon content, pH in 1 M KCl potentiometrically. The total content of metals after mineralization in aqua regia was determined, and cadmium fractions were determined by a modified BCR method. The measurements were made by atomic absorption spectroscopy with electrothermal atomization using Varian AA-100 spectrometer. It was found that only 2 soils can be included in soils with first pollution degree due to cadmium content. The content of other metals was at geochemical background level. The distribution of investigated metals in fractions in studied organic soils was different comparing to mineral soils. Most of the analyzed elements were present in fraction associated with organic substance, which limited their mobility as evidenced by their low share in the available and potentially available fraction. The proportion of metals in residual fraction was low, which is typical for organic soils. The share of studied metals in particular fractions varied depending on sampling date, which may be related to climatic conditions course in study period and treatments performed on these soils.
CORRESPONDING AUTHOR:
Józefa Wiater   
Department of Environmental Engineering Technology and Systems, Bialystok University of Technology, Wiejska 45A, 15-351 Białystok, Poland