The content of potential toxic trace elements in Eastern Serbia coal basins

Abstract

The contents of potentially toxic trace elements were studied on coals from four basins of Eastern Serbia. Analyses were performed by ICP-MS method in laboratory of Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) in Hannover (Germany).The contents of potentially toxic trace elements in coals of Eastern Serbia is variable not only from basin to basin, but also within a basin. High As contents were detected in coals from the Senje-Resava basin (11.00 - 160.00 mg/kg), East field Bogovina basin (8.75 - 75.50 mg/kg) and Krepoljin basin (15.90 - 85.00 mg/kg), while in the other basins it is low. Selenium content is high in coals from East field of the Bogovina basin (1.11 - 28.90 mg/kg), and Mn content is high in coals from the Krepoljin basin. Increased contents of Co, Cr, Cu and Hg were detected in Senje-Resava and Krepoljin coals, and increased contents of Ni and Pb in Senje-Resava Krepoljin and East field Bogovina coals. Berilium and cadmium contents are low in all studied coals. Correlation analysis revealed that Be, Cr, Cu, Sb Co and Ni in Senje-Resava coals is most probably related to atrinite, while in coals from the other basins those elements occur within clay minerals and 'mineral-bituminous groundmass'. Manganese mostly comes from carbonate minerals.

Sadržaj potencijalno toksičnih mikroelemenata (As, Be, Cd, Co, Cr, Cu, Hg Mn, Ni, Pb, Sb, Se, Th i U) proučen je na četrdeset šest uzoraka uglja donjomiocenske starosti iz Senjsko-resavskog basena (ležišta Senjski rudnik Jelovac i Strmosten), Bogovinskog basena (Istočno polje), Sokobanjskog basena (ležište Soko) i Krepoljinskog basena (ležište Centralno polje). Analize su izvršene metodom masene spektrometrije indukovane kuplovane plazme (ICP-MS) u laboratoriji Saveznog zavoda za geonauke i mineralne sirovine (Bundesanstalt für Geowissenschaften und Rohstoffe-BGR) u Hanoveru (Nemačka). U odnosu na klark za mrke ugljeve visok sadržaj arsena konstatovan je uglju Senjsko-resavskog (prosečno 45,38 mg/kg), Istočnom polju Bogovinskog (35,20 mg/kg) i Krepoljinskom basenu (52,12 mg/kg), dok je u ostalim basenima nizak. Sadržaj selena visok je jedino u uglju Istočnog polja Bogovinskog basena (3,24 mg/kg), dok su visoke vrednosti mangana konstatovane jedino u uglju Krepoljinskog basena (435,70 mg/kg). Povišen sadržaj kobalta, hroma, bakra i žive konstatovan je u uglju Senjsko-resavskog i Krepoljinskog basena, a nikla i olova u uglju Senjsko-resavskog, Krepoljinskog i Istočnom polju Bogovinskog basena.