Biotechnology Letters

, Volume 30, Issue 3, pp 445–449

“Bioshrouding”—a novel approach for securing reactive mineral tailings

Original Research Paper

DOI: 10.1007/s10529-007-9574-4

Cite this article as:
Johnson, D.B., Yajie, L. & Okibe, N. Biotechnol Lett (2008) 30: 445. doi:10.1007/s10529-007-9574-4

Abstract

A novel technique (“bioshrouding”) for safeguarding highly reactive sulfidic mineral tailings deposits is proposed. In this, freshly milled wastes are colonised with ferric iron-reducing heterotrophic acidophilic bacteria that form biofilms on reactive mineral surfaces, thereby preventing or minimising colonisation by iron sulfide-oxidising chemolithotrophs such as Acidithiobacillus ferrooxidans and Leptospirillum spp. Data from initial experiments showed that dissolution of pyrite could be reduced by between 57 and 75% by “bioshrouding” the mineral with three different species of heterotrophic acidophiles (Acidiphilium, Acidocella and Acidobacterium spp.), under conditions that were conducive to microbial oxidative dissolution of the iron sulfide.

Keywords

Acid pollution Acidophilic bacteria Heterotrophic bacteria Iron Mineral tailings Pyrite 

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.School of Biological SciencesUniversity of WalesBangorUK
  2. 2.East China Institute of TechnologyFuzhouP.R. China
  3. 3.Research Institute for Innovative Technology for the Earth (RITE)KyotoJapan