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Title: The Role of Mineral Matter in Concentrating Uranium and Thorium in Coal and Combustion Residues from Power Plants in Poland
Authors: Parzentny, Henryk R.
Róg, Leokadia
Keywords: Th and U in minerals; feed coal; combustion residues; environment pollution
Issue Date: 2019
Citation: Minerals, Vol 9 (2019), Art. No. 312
Abstract: Based on the results of tests on feed coal from the Lublin Coal and Upper Silesian Coal Basin and its fly ash and slag carried out using X-ray di raction and X-ray fluorescence analysis, atomic emission spectroscopy, and scanning electron microscopy, it was found that in feeds, coal Th is associated with phosphates and U with mineral matter. The highest Th content was found in anhedral grains of monazite and in Al-Si porous particles of fly ash of <0.05 mm size; whereas in the slag, Th is concentrated in the massive Al-Si grains and in ferrospheres. U is mainly concentrated in the Al-Si surface of porous grains, which form a part of fly ash of <0.05 mm size. In the slag, U is to be found in the Al-Si massive grains or in a dispersed form in non-magnetic and magnetic grains. Groups of mineral phase particles have been identified that have the greatest impact on the content of Th and U in whole fly ash and slag. The research results contained in this article may be important for predicting the e ciency of Th and U leaching from furnace waste storage sites and from falling dusts to soils and waters.
DOI: 10.3390/min9050312
ISSN: 2075-163X
Appears in Collections:Artykuły (WNP)

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