Soil contamination as one of the influences on afforestation after precious metals mining at selected bearings in central Europe

Pecina, Václav

Mining of precious metals poses a threat to the environment by heavy metal contamination. Soil contamination by selected heavy metals (As, Cd, Cu, Pb, Zn) and its effect on woody species used for afforestation was investigated at selected localities (Příbram-Březové Hory, Banská Štiavnica-Lintich, Olkusz-Bolesław). Concentrations of the heavy metals in the soil and assimilation apparatus were determined by the XRF method and other soil characteristics (pH, humus content, texture) were also determined. At all the localities, the pollution indicators have been exceeded, both for soils and for trees. In the case of trees, it was mainly zinc contamination and the maximum values of Zn in their assimilation apparatus on reclaimed areas have exceeded the lower limit of the pollution indicator 3 times in the case of Březové Hory, 11 times in the case of Lintich and 23 times in the case of Bolesław. The evidence of the heavy metal intoxication in the trees was also found. Based on the found situation and the planned use of reclaimed areas, management has been designed to improve the situation.

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