科研之友
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摘要
This paper presents the results of a 20-year survey of selected physical and chemical parameters of mine drainage and associatedstream sediments at the abandoned Smoln赤k deposit (East Slovakia). The Smoln赤k mine was in operation intermittently fromthe 14th century for Au, Ag, Cu, Fe and pyrite (FeS2). In 1990 - 1994 the mine was finally closed and flooded. In 1997 a remediationeffort was initiated in an attempt to improve the quality of acid mine drainage (AMD) from the mine site. Monitoring of the AMD waterparameters has continued since 2000 in quarterly intervals. Considering the concentration of dissolved constituents and the flow rateof the AMD, the abandoned Smoln赤k deposit brings about continuous loading of more than 500 kg of dissolved metals per dayto the adjacent Smoln赤k stream.The ochreous precipitates formed from AMD stream were characterized by elemental analysis, X-ray diffraction and scanningelectron microscopy. Schwertmannite was the dominant solid phase in the precipitates. The chemical analysis of AMD and the elementalcomposition of related sediments indicated selective scavenging potential of the precipitates for arsenic and other metal species.
