Leaching of heavy metals in acid mine drainage

Lana Saria, Takayuki Shimaoka, Kentaro Miyawaki

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Acid mine drainage is one of the most serious environmental problems that the coal and metal mining industry is currently facing. The generation of low pH drainage enhances the dissolution of heavy metals in water. The samples used in this research originated from three pits at mine dumps. In a study reported in this paper, three types of tests; namely static test, kinetic test and column test were conducted to estimate acid generation and acid neutralization reaction rates, and to predict the solubility of metals and their release rates. Static test showed that all samples had a pH of net acid generation (NAG pH) < 4, a net acid producing potential (NAPP) > 10 kg H2SO4tonne-1, and a S-content > 3%, which can be classified as a high acid-forming capacity. Simulated runoff in the column tests was equivalent to 5-year average rainfall in Indonesia, the resultant leachates showed acidic behaviour (pH < 3.5). Based on the results, it was found that high mobilization of heavy metals (Cr, Cu, Zn, Cd and Pb) takes place under strong acidic conditions (pH ≅ 2).

Original languageEnglish
Pages (from-to)134-140
Number of pages7
JournalWaste Management and Research
Volume24
Issue number2
DOIs
Publication statusPublished - Apr 1 2006

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Pollution

Fingerprint Dive into the research topics of 'Leaching of heavy metals in acid mine drainage'. Together they form a unique fingerprint.

  • Cite this