Next Article in Journal
Agates from Kerrouchen (The Atlas Mountains, Morocco): Textural Types and Their Gemmological Characteristics
Next Article in Special Issue
Phytomining for Artisanal Gold Mine Tailings Management
Previous Article in Journal
Selective Leaching of Vanadium from Roasted Stone Coal by Dilute Sulfuric Acid Dephosphorization-Two-Stage Pressure Acid Leaching
Previous Article in Special Issue
Enhancement of Biofilm Formation on Pyrite by Sulfobacillus thermosulfidooxidans
Article Menu

Export Article

Open AccessArticle
Minerals 2016, 6(3), 76; https://doi.org/10.3390/min6030076

Influence of Sulfobacillus thermosulfidooxidans on Initial Attachment and Pyrite Leaching by Thermoacidophilic Archaeon Acidianus sp. DSM 29099

Biofilm Centre, Aquatische Biotechnologie, Universität Duisburg—Essen, Universitätsstraße 5, 45141 Essen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: W. Scott Dunbar
Received: 29 April 2016 / Revised: 6 July 2016 / Accepted: 13 July 2016 / Published: 21 July 2016
(This article belongs to the Special Issue Biotechnologies and Mining)
Full-Text   |   PDF [3762 KB, uploaded 21 July 2016]   |  

Abstract

At the industrial scale, bioleaching of metal sulfides includes two main technologies, tank leaching and heap leaching. Fluctuations in temperature caused by the exothermic reactions in a heap have a pronounced effect on the growth of microbes and composition of mixed microbial populations. Currently, little is known on the influence of pre-colonized mesophiles or moderate thermophiles on the attachment and bioleaching efficiency by thermophiles. The objective of this study was to investigate the interspecies interactions of the moderate thermophile Sulfobacillus thermosulfidooxidans DSM 9293T and the thermophile Acidianus sp. DSM 29099 during initial attachment to and dissolution of pyrite. Our results showed that: (1) Acidianus sp. DSM 29099 interacted with S. thermosulfidooxidansT during initial attachment in mixed cultures. In particular, cell attachment was improved in mixed cultures compared to pure cultures alone; however, no improvement of pyrite leaching in mixed cultures compared with pure cultures was observed; (2) active or inactivated cells of S. thermosulfidooxidansT on pyrite inhibited or showed no influence on the initial attachment of Acidianus sp. DSM 29099, respectively, but both promoted its leaching efficiency; (3) S. thermosulfidooxidansT exudates did not enhance the initial attachment of Acidianus sp. DSM 29099 to pyrite, but greatly facilitated its pyrite dissolution efficiency. Our study provides insights into cell-cell interactions between moderate thermophiles and thermophiles and is helpful for understanding of the microbial interactions in a heap leaching environment. View Full-Text
Keywords: bioleaching; initial attachment; biofilm formation; Sulfobacillus; Acidianus; interspecies interactions bioleaching; initial attachment; biofilm formation; Sulfobacillus; Acidianus; interspecies interactions
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Liu, J.; Li, Q.; Sand, W.; Zhang, R. Influence of Sulfobacillus thermosulfidooxidans on Initial Attachment and Pyrite Leaching by Thermoacidophilic Archaeon Acidianus sp. DSM 29099. Minerals 2016, 6, 76.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top