Ceramics-Silikáty 56, (1) 9 - 14 (2012) |
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OCHRE PRECIPITATES AND ACID MINE DRAINAGE IN A MINE ENVIRONMENT
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Máša Branislav 1,3, Pulišová Petra 2, Bezdička Petr 2,
Michalková Eva 1,
Šubrt Jan 2
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1 Technical University in Zvolen, Faculty of Ecology and Environmental Sciences
T. G. Masaryka 24, 960 53 Zvolen, Slovakia
2 Institute of Inorganic Chemistry of the AS CR, v.v.i., 250 68 Husinec-Řež, Czech Republic
3 HES-COMGEO spol. s.r.o., Kostiviarská cesta 4, 974 01 Banská Bystrica, Slovakia
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Keywords: Ochre precipitate, Acid Mine Drainage (AMD), X-ray diffraction analysis (XRD), Scanning electron microscopy
(SEM), Specific surface area and porosity
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This paper is focused to characterize the ochre precipitates and the mine water effluents of some old mine adits and settling
pits after mining of polymetallic ores in Slovakia. It was shown that the mine water effluents from two different types
of deposits (adits; settling pits) have similar composition and represent slightly acidic sulphate water (pH in range
5.60-6.05, sulphate concentration from 1160 to 1905 g.dm-3). The ochreous precipitates were characterized by methods
of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and B.E.T. method for measuring the specific
surface area and porosity. The dominant phases were ferrihydrite with goethite or goethite with lepidocrocide. |
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