Abstract
The geochemical characteristics of coal cleaning rejects (CCR) in Santa Catarina State, Brazil, were investigated. Around 3.5 million ton/ year of coal waste are dumped in Santa Catarina State. Coal beneficiation by froth flotation results in large amounts of CCR composed of coaly and mineral matter, the latter characterized by the occurrence of sulphide minerals and a broad array of leachable elements. The total and leachable contents of more than 60 elements were analyzed. Atmospheric exposure promotes sulphide oxidation that releases substantial sulphate loads as well as Ca2+, K+, Mg2+, Cl- and Al3+. The metals with the most severe discharges were Zn, Cu, Mn, Co, Ni and Cd. Most trace pollutants in the CCR displayed a marked pH-dependent solubility, being immobile in near-neutral samples. The results highlight the complex interactions among mineral matter solubility, pH and the leaching of potentially hazardous elements. © 2010 Springer Science+Business Media B.V.
Recommended Citation
L. F. Silva et al., "Leaching of Potential Hazardous Elements of Coal Cleaning Rejects," Environmental Monitoring and Assessment, vol. 175, no. 1 thru 4, pp. 109 - 126, Springer, Apr 2011.
The definitive version is available at https://doi.org/10.1007/s10661-010-1497-1
Department(s)
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
1573-2959; 0167-6369
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2023 Springer, All rights reserved.
Publication Date
01 Apr 2011
PubMed ID
20490913
Included in
Biochemical and Biomolecular Engineering Commons, Biomedical Devices and Instrumentation Commons
