USE OF COAL MINING WASTE FOR THE REMOVAL OF ACIDITY AND METAL IONS AL (III), FE (III) AND MN (II) IN ACID MINE DRAINAGE

The coal industry may generate acid mine drainage (AMD) and mining wastes, which may adversely affect the quality of the environment. In this study we propose the use of this waste in the removal of acidity and metal ions, as well as in the reduction of the toxicity of AMD. A physico-chemical analys...

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Bibliographic Details
Published in:	Environmental technology Vol. 29; no. 8; pp. 863 - 869
Main Authors:	Geremias, R., Laus, R., Macan, J. M., Pedrosa, R. C., Laranjeira, M. C. M., Silvano, J., Fávere, F. V.
Format:	Journal Article
Language:	English
Published:	London Routledge 01-08-2008 Selper
Subjects:	Acid mine drainage Acids - chemistry Aluminum - isolation & purification Animals Applied sciences Artemia Artemia - drug effects Artemia sp Coal Mining coal mining waste Daphnia - drug effects Daphnia magna Environmental Restoration and Remediation - methods Exact sciences and technology Hydrogen-Ion Concentration Industrial Waste metal ions Metals, Heavy - isolation & purification Other industrial wastes. Sewage sludge Pollution Refuse Disposal - methods Wastes Water Pollutants, Chemical - isolation & purification British Isles Chemical analysis Toxicity Metal ion Acidity Artemia sp metal ions Coal industry Industrial waste Iron III pH Coal mining Acid mine drainage coal mining waste Daphnia magna Mining waste
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Summary:	The coal industry may generate acid mine drainage (AMD) and mining wastes, which may adversely affect the quality of the environment. In this study we propose the use of this waste in the removal of acidity and metal ions, as well as in the reduction of the toxicity of AMD. A physico-chemical analysis of the waste shows the presence of mainly SiO 2 , Al 2 O 3 and Fe 2 O 3 and a superficial area of 4.316 m 2 g −1 . The treatment of AMD with the waste resulted in an increase in pH from 2.6 to 7.8 and removed 100% of the Al (III), 100% of the Fe (III) and 89% of the Mn (II). We also observed that the high toxicity of the AMD towards Daphnia magna (LC 50 = 3.68%) and Artemia sp. (LC 50 = 4.97%) was completely eliminated after treatment with the waste. The data obtained allow us to propose that the waste can be used in the treatment of AMD, providing an economic use for the waste.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0959-3330 1479-487X
DOI:	10.1080/09593330802015409