DBPapers
DOI: 10.5593/SGEM2014/B31/S12.005

ANALYSIS OF CONCENTRATIONS HEAVY METALS (Zn, Pn, Cu, Cd) IN SPOIL TIP LEACHATE FROM COAL MINING

T. Molenda
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 35-42 pp

ABSTRACT
Industrial waste landfills are the source of pollution of the surface water and groundwater. Water pollution is mainly a consequence of highly mineralised leachate. In addition to the high concentration of the main ions leaching water may contain high concentrations of other substances, including heavy metals. This article analyses the presence of heavy metals in coal mining landfill leachate. For the study the objects located in the Upper Silesian Coal Basin were selected. As control objects natural springs flowing from the Carboniferous rock were chosen. It was shown that the leachate water has high electrolytic conductivity (up to 17 mS/cm-1) and neutral or slightly acidic pH. The concentration of heavy metals in the leachate is not large. There were no statistically significant differences between the heavy metals concentration in the leachate and spring water. Moreover, there were no statistically significant correlations between the pH and the concentration of heavy metals. Neutral or slightly acidic pH of the leachate is not conducive to leaching metals from waste. It should be recognised that mining landfills are not major sources of heavy metals pollution of the hydrosphere.

Keywords: heavy metals, leachate, rubbish dumps, water pollution