engleski

Mineralogical and geochemical characteristics of soil in vicinity of Zagreb wastewater company

The main goal of this study was to determine mineralogical and geochemical characteristics of soil in vicinity of Zagreb wastewater company situated in the eastern part of Zagreb, Croatia in order to better understand the distribution of mineral phases and heavy metal concentration in the study area. Soil samples were collected from 8 different locations, of which one is made of a vertical profile of depth up to 80 cm. Numerous laboratory methods have been performed on soil samples, including determination of color, pH value and electrical conductivity, CaCO3 content, organic matter content, texture analysis, sequential extraction analysis (BCR), atomic absorption spectroscopy (AAS), cation exchange capacity (CEC) and X-ray diffraction analysis (XRD). The soil is determined as Fluvisol. pH values are neutral to slightly basic. Soil texture is determined as silty to sandy loam. The main mineralogical compound of analyzed soil are carbonate minerals and quartz. In clay fraction of soil lesser than 2 µm, chlorite and illite prevails. It was found that Cr, Ni and Cd exceeded MAC values and therefore represent potential environmental hazards.

heavy metals, soil mineralogy, industrial contamination, Zagreb wastewater company

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