Izvorni znanstveni članak

https://doi.org/10.4154/gc.2019.06

Distribution of major and trace elements in the Kovin lignite (Serbia)

Dragana Životić orcid.org/0000-0001-6218-7091 ; University of Belgrade, Faculty of Mining and Geology, Serbia
Olga Cvetković ; Center of Chemistry, IChTM, Belgrade, Serbia
Predrag Vulić orcid.org/0000-0002-4806-4551 ; University of Belgrade, Faculty of Mining and Geology, Serbia
Ivan Gržetić orcid.org/0000-0002-3366-2161 ; University of Belgrade, Faculty of Chemistry, Belgrade, Serbia
Vladimir Simić orcid.org/0000-0002-2483-1779 ; University of Belgrade, Faculty of Mining and Geology, Serbia
Konstantin Ilijević ; University of Belgrade, Faculty of Chemistry, Belgrade, Serbia
Biljana Dojčinović ; Center of Chemistry, IChTM, Belgrade, Serbia
Suzana Erić ; University of Belgrade, Faculty of Mining and Geology, Serbia
Bogdan Radić ; Kovin coal mine, Kovin, Serbia
Sanja Stojadinović ; Center of Chemistry, IChTM, Belgrade, Serbia
Snežana Trifunović ; University of Belgrade, Faculty of Chemistry, Belgrade, Serbia

Sažetak

A geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). The most abundant minerals in all lignite samples from the three coal seams
are clays (illite/smectite), silicates (quartz, plagioclase), sulphates (gypsum/anhydrite) and carbonate (calcite). The other iron-rich minerals are sulphides, oxides and hydroxides (pyrite, magnetite,
haematite, and limonite). In general, mineral matter in the matrix coal consists of illite/smectite and quartz, while xylite-rich coals, apart from illite/smectite, have a higher content of sulphates and Fe-oxide/hydroxide minerals. The lignite from the Kovin deposit is enriched in As, Cd, Co, Cr, Cu, Ga, Li, Mn, Mo, Ni, Pb, V, Zn, Gd, Tb, Er and Lu in comparison with the Clarke values for brown coals. The statistical analysis of bulk compositional data shows inorganic affinity
for the majority of the major and trace elements and possible association with pyrite, illite/smectite and calcite.

Ključne riječi

Kovin deposit; lignites; major and trace elements; mineral composition

Hrčak ID:

217684

URI

https://hrcak.srce.hr/217684

Datum izdavanja:

15.2.2019.

Posjeta: 867 *