Electrochemistry of Thiobacillus ferrooxidans reactions with pyrite Page: 2 of 35
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1. STATEMENT AND OBJECTIVES
The objective of this project is to provide the fundamental
information on the mechanisms of bacterial leaching of pyrite. The
knowledge of how bacterial leaching of pyrite functions is
i essential for design and development of a technology for coal
i; cleaning with bacteria. The features of major electrochemical
techniques will be examined to find out if any of them can provide
a diagnostic information on the mechanisms of related reactions.
2. SCIENTIFIC AND TECHNICAL PROGRESS
This report discusses the research results obtain during the study
of effect of environmental conditions on the chemical activity of
T. ferrooxidans. More specifically, the environmental conditions
mean the effect of heavy metals, particularly silver, on the
activity of bacteria. The chemical activity of bacteria is
expressed in terms of its oxidizing ability of ferrous ion. The
method of measuring the activity of bacteria is based on the
variation of solution redox potentials with time. Our technique is
unique compared to the traditional chemostat techniques because it
allows the measurement of the bacteria's activity due to its
oxidizing property only, excluding the bacteria growth.
The redox potential measurement methods do follow already
developed, traditional, kinetic models, and this kind of analysis
will be reported in the next trimester. This is an encouraging
news because the redox potential technique can be utilized to
extract standard kinetic information plus it provides additional
information which are not available in standard techniques.
This report represents a paper in preparation which will be
submitted for review for publication after its completion.
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Pesic, B. Electrochemistry of Thiobacillus ferrooxidans reactions with pyrite, report, January 1, 1992; United States. (digital.library.unt.edu/ark:/67531/metadc1093706/m1/2/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.