COMPARATIVE MOSSBAUER STUDY OF THE EFFECTS OF NATURAL WEATHERING AND ARTIFICIAL OXIDATION ON IRON MINERALS PRESENT IN COAL

Authors
GRACIA M GANCEDO JR BARRERO ML GARCIA AB MARTINEZALONSO A TASCON JMD
Citation
M. Gracia et al., COMPARATIVE MOSSBAUER STUDY OF THE EFFECTS OF NATURAL WEATHERING AND ARTIFICIAL OXIDATION ON IRON MINERALS PRESENT IN COAL, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 76(1-4), 1993, pp. 191-194
Citations number
10
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
76
Issue
1-4
Year of publication
1993
Pages
191 - 194
Database
ISI
SICI code
0168-583X(1993)76:1-4<191:CMSOTE>2.0.ZU;2-L
Abstract
Fresh and naturally weathered coal samples from the same seam as well as the former one submitted to artificial oxidation treatments were st udied by Mossbauer spectroscopy to examine the effect of coal oxidatio n conditions on the transformations of iron minerals. It was found tha t illite, pyrite and siderite are converted into jarosite and goethite in a natural environment, whereas only a small fraction of Fe2+ from pyrite was oxidized to Fe3+ under laboratory conditions, even after he ating in air to 468 K. It is concluded that artificial oxidation exper iments hardly reproduce the conditions met by coal when submitted to n atural weathering.