engleski

Distribution of TEs in urban soils:Zagreb city case study

In Croatia soil monitoring is a legal obligation comprised of monitoring not just the soil, but as well other environmental media, primarily water and air. However, monitoring of urban soils' quality is more complex because of the diverse soil usage. In Zagreb, soil monitoring is associated with sustainable drinking water supply, health aspects of direct intake, proximity to landfills or sources of industrial pollution, food production in urban areas, recreational and sports areas, and aesthetic effects in city parks due to contamination or salinization of the soil along roads. Thus, urban soils' quality monitoring programme in Zagreb commenced in 2015. Within the programme 150 soil samples were collected throughout the city along pre-determined transects, 36 soil samples from 3 localities located near landfills or sources of industrial pollution, and 20 soil samples at 2 localities near high frequency roads. Main chemical soil properties, trace elements, PAH and PCB were determined. The values obtained were compared with available data from Croatian government regulation on the protection of the agricultural land from pollution, as with Central Croatia soil data, soil worldwide and average continental crust composition. Furthermore, soil quality was assessed by applying statistics and geostatistics. TEs and PAH deviate from baseline concentrations, while distribution of the trace metal concentrations interpreted as anthropogenically polluted and/or naturally enriched soil.

urban soils, monitoring, TEs, spatial heterogeneity, anthropogenic and natural factors

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