Weathering in coal mine rejects and tailings - Variation with respect to depth

S. Devasahayam*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Acid production or acid drainage is a major environmental issue that also has negative implications on the aquifer system surrounding the mine tailings area. The approach to controlling acid mine drainage involves physical and geochemical characterization that affect acid production. The material permeability determines the availability of oxygen, which is paramount in acid production in coal rejects, and varies with depth. In this paper the author presents the variation in oxidized pyrite/acid production with depth in black coal mine washery wastes. Chemical kinetic parameters and the diffusive parameters have been used to obtain the variation in oxygen content and the oxidized pyrite content with respect to the depth and time. Its dependence on porosity and moisture content is illustrated.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalMinerals and Metallurgical Processing
Volume24
Issue number1
Publication statusPublished - Feb 2007
Externally publishedYes

Keywords

  • Acid rock drainage
  • Coal
  • Oxidation-depth-dependence
  • Porosity
  • Reaction kinetics
  • Tailings

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