57Fe Mössbauer spectroscopic investigation of some coals of geographically different provenance and their fly ashes
Coal samples of geographically different provenance and their undifferentiated and fractionated fly ashes were studied with a Mössbauer spectrometer at room temperature. The Mössbauer results were complemented with elemental concentration measurements, using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). A high concentration of arsenic, a toxic environmental pollutant, was observed in a coal sample from one of the sources. Mössbauer analysis showed that it also has high pyrite, FeS2. Calculations of the ratios of Fe3+ to σFe in the coal fly ash aluminosilicate-glasses allowed us to assign structural positions of the ferric and ferrous ions in them.
KeywordsCombustion Arsenic Magnetite Pyrite Hematite
Unable to display preview. Download preview PDF.
- I.O.B. Ewa, J. Adetunji and S.B. Elegba, J. Environ. Sci. Health A31(5), (1996) 1089.Google Scholar
- B.O. Mysen and D. Virgo, American Mineralogist, 74 (1989) 58.Google Scholar
- J. G Stevens, A.M. Khasanov, J.W. Miller, H. Pollak and Z. Li, in: Mössbauer Mineral Handbook (Puhl. Mössbauer effect Data Centre, Asheville, USA. 1998).Google Scholar
- B. Morosin, R.A. Graham, P. Richards, Appl. Phys. Com. 5(1–2) (1985) 1.Google Scholar
- J. Adetunji, J.M. Williams and A. Mehra [Paper to be published].Google Scholar