Non-carbonate geochemical options for long-term sustainable acid and metalliferous drainage control at-source

Yan Zhou, Michael Short, Jun Li, Rong Fan, Gujie Qian

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Acid mine drainage (AMD) from mine wastes is a critical environmental issue worldwide. It is caused principally by the oxidation of pyrite (FeS 2 ) through a combination of complex reactions (physical, chemical, and biological), often associated with toxic metals/metalloids with varying toxicity, such as As, Cd, Pb and Zn. This paper is specifically focused on the role of reactive silicate minerals (including aluminosilicates) in contributing to pyrite surface passivation (at-source control for reduced AMD generation) and neutralisation processes for long-term AMD mitigation. The neutralisation potential of (alumino)silicate minerals (those readily accessible on-site) to buffer acid generation at reduced pH levels in the long-term is also discussed in the review. Overall, the review aims to present cost-effective solutions, using readily available (alumino)silicate minerals, to provide long-term neutralisation and precursors required for pyrite surface passivation (source control) for sustainable at-source geochemical AMD control.

Original languageEnglish
Article number157
Number of pages16
JournalEnvironmental Earth Sciences
Volume78
Issue number5
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Acid mine drainage
  • Geochemical controls
  • Pyrite oxidation
  • Silicate dissolution
  • Surface passivation

Fingerprint Dive into the research topics of 'Non-carbonate geochemical options for long-term sustainable acid and metalliferous drainage control at-source'. Together they form a unique fingerprint.

  • Cite this