Kinetics of pyrite, pyrrhotite, and chalcopyrite dissolution byAcidithiobacillus ferrooxidans-Reference-Cited by-同舟云学术

Kinetics of pyrite, pyrrhotite, and chalcopyrite dissolution byAcidithiobacillus ferrooxidans

Published:2016-08 Issue:8 Volume:62 Page:629-642
ISSN:0008-4166
Container-title:Canadian Journal of Microbiology
language:en
Short-container-title:Can. J. Microbiol.

Author:

Kocaman Ayse Tuba¹²,Cemek Mustafa²,Edwards Katrina Jane¹

Affiliation:

1. Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA.

2. Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, 34210 Esenler, Istanbul, Turkey.

Abstract

The main objective of this study was to investigate the dissolution kinetics of pyrite, pyrrhotite, and chalcopyrite. Crushed minerals were reacted with Acidithiobacillus ferrooxidans (25 °C). The kinetics of dissolution was investigated by monitoring pH and Fe2+and Fe3+ion concentrations in the leaching solutions. Pyrite, pyrrhotite, and chalcopyrite dissolution by A. ferrooxidans was found to be a chemically controlled process. With bacteria, the dissolution rates of the minerals increased in the order of pyrrhotite, pyrite, and chalcopyrite. The number of cells attached to mineral surfaces increased in the same order. Acidithiobacillus ferrooxidans was found to enhance the dissolution rates of the minerals. The acid-insoluble trait of pyrite and acid-soluble trait of the other 2 minerals affected the pH changes in the leaching solutions.

Publisher

Canadian Science Publishing

Subject

Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology

Link

http://www.nrcresearchpress.com/doi/pdf/10.1139/cjm-2016-0085

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