Inorganic Chemical Chracterization of the Bitola, Oslomej, and Berovo Coals and their Waste Products from Burning, FYROM

The coals are the main and dominant energy resource in FYROM. The mineral and inorganic chemical composition of two types of samples have been studied from the Oslomej, Bitola and Berovo lignite coals and their products generated from the Oslomej and Bitola thermo-electric power stations (TEPSs). They include low-grade coals (coals for TEPS) and solid wastes (flyashesandbottomashes).Themineralsidentifiedinthelignitesincludequartz,kaolinite,illite,K-feldspar,plagioclase,amphibole, smectite, pyrite, and others. The phase composition of waste products is represented by glass, quartz, albite, magnetite, gypsum. The concentration and behaviour of 43 elements have been also tested. All of the ash-forming elements (Si, Al, Mg, K, Ca, Fe, C, P, S, Ti, and Mn) are present in varying concentrations in the lignites and waste products. The trace elements enriched in coals (Mo, Sc, Pb, Cr, Y, Zr, Ti, Zn, and V) and waste products (Nb, Mn, Sb, Hg, Y, and Cd) normally have low over Clarke values. The data obtained is topical and pioneer for the former Yugoslav Republic of Macedonia

Characterization of coal from the Mariovo basin, Macedonia – Insights from organic geochemical and sulphur isotopic data.

Data detailed petrographic study of coal from the Mariovo basin in Macedonia suggests circulation of fluids mobilizing metals from different origins (basement, volcanism ?) during burial. Sulphur isotopic data on organic matter and pyrite indicate dominantly marine-derive fluids and processus of bacterial reduction of sulphates