DBPapers
DOI: 10.5593/SGEM2014/B52/S20.035

EVALUATION OF POTENTIALLY TOXIC ELEMENTS MOBILITY IN TAILINGS IMPOUNDMENT SLOVINKY (EASTERN SLOVAKIA)

R. Tуth, E. Hiller, L. Jurkovic, P. Sottnik, J. Vozar, A . Gondikas
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-18-6 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 2, 259-266 pp

ABSTRACT
Tailings impoundment Slovinky (eastern Slovakia) was used for deposition of flotation sludge from processing of siderite-sulphidic ores and in the latest phase for the deposition of slag material from processing of Cu ores in Metallurgical plant Krompachy. The impoundment sediments contain high average concentrations of potentially toxic elements (PTE) (As, Sb, Cu, Zn, Pb). The general aim of this study is to evaluate the leachability and transport of monitored elements from tailings into surrounding environment, to elucidate the impact of different factors (content of Fe and Al, physicochemical properties, dissolution and precipitation of mineral phases, etc.) on PTE mobility. In order to evaluate the mobility of monitored PTE several single-step extraction experiments were used, basic physicochemical properties were measured, laboratory „pot leaching experiment“ was conducted and the waters flowing into the impoundment, drainage waters, and surrounding surface waters were analyzed. The studied elements are relatively strongly bound in the the tailings impoundment sediments and are characterized by low mobility, because of the neutral to slightlyalkaline character of the sediments, low solubilities of element–bearing sulphides and low proportion of these elements in easily mobilizable fraction.

Keywords: tailings impoundment Slovinky; As, Sb, Cu, Zn, Pb mobility; single-step extractions, pot leaching experiment, drainage waters