Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 186, Issue 1, Pages 516-525Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.11.032
Keywords
Fenton's Reaction; Accelerated weathering; Coal mining residues; Environmental impact
Categories
Funding
- Joares Pontcelli
- Dionisio Bresan
- FEHIDRO
- Ferrovia Teresa Cristina
- Basque Government [IT-245-07, IE09-242]
Ask authors/readers for more resources
Fenton's reaction is proposed as an accelerated weathering test for sulphides associated with Brazilian Coal Mining Residues (CMR), that are exposed to oxygen and water during the mining of coal. TEM and SEM/EDX were used to evaluate the nature, occurrence and distribution of minerals in remaining coals and other lithological units, before and after applying the test. Oxidation of CMRs was examined by analyzing soluble sulphur (sulphate) and dissolved metals by ICP-MS or ICP OES. As dissolved sulphate increases, dissolved Zn, Cd, Cu and Co concentrations increase, leading to undetectable amounts in the remaining solid phases; dissolved Ni and Mn also increase with the mobilized sulphur, but the remainder in the solids is the most important fraction; Fe and Pb are not mobilized due to precipitation as jarosite or hematite in the case of Fe or as sulphate in the case of Pb. Agreement between the observed results and the predictions by geochemical modelling is discussed. (c) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available