The adsorption of Thiobacillus ferrooxidans on coal surfaces
- 1 April 1986
- journal article
- research article
- Published by Wiley in Biotechnology & Bioengineering
- Vol. 28 (4), 467-479
- https://doi.org/10.1002/bit.260280402
Abstract
The adsorption of Thiobacillus ferrooxidans to coal surfaces has been studied. Adsorption experiments were conducted on coal samples from eight different Eastern coal fields. In all cases the adsorption process was at least 90% complete within the first two minutes following inoculation. The results of these experiments were used to test the validity of two proposed adsorption models. The first model assumes that bacterial adsorption follows second-order irreversible kinetics of the second kind with respect to the concentration of bacteria and substratum surface area in the system. The second model allows for the contribution of reversible adsorption detected in desorption experiments. It was found that the combined reversible–irreversible model more accurately describes the initial stages of adsorption. Rate constants in both models were calculated for each coal sample. The relation of each of these constants to the pyrite concentration in coal is presented and the significance of these relations is discussed. Scanning electron micrographs of inoculated coal samples sho that Thiobacillus ferrooxidans selectively adsorb to exposed pyrite phases dispersed throughout the organic coal matrix. Preferential attachment was also observed along topographical faults in the caol surface. Mercury contact angle measurements on coal indicate that the selective adsorption of Thiobacillus ferrooxidans may be attributable to the lower surface free energy of pyrite relative to the organic coal matrix.This publication has 22 references indexed in Scilit:
- The adsorption ofThiobacillus ferrooxidans on solid particlesBiotechnology & Bioengineering, 1983
- Effect of surface shear stress on the attachment of Pseudomonas fluorescens to stainless steel under defined flow conditionsBiotechnology & Bioengineering, 1982
- Bacterial leaching patterns on pyrite crystal surfacesJournal of Bacteriology, 1978
- Bacterial LeachingCRC Critical Reviews in Microbiology, 1978
- Microbiological leaching of a chalcopyrite concentrate by Thiobacillus ferrooxidansBiotechnology & Bioengineering, 1976
- Direct observations of selective attachment of bacteria on low-grade sulfide ores and other mineral surfacesHydrometallurgy, 1976
- Bacterial attachment to molybdenite: An electron microscope studyMetallurgical Transactions B, 1975
- Attachment of Bacteria to Sulphur in Extreme EnvironmentsJournal of General Microbiology, 1973
- Adhesion: Mechanisms That Assist or Impede ItScience, 1968
- PROTEIN MEASUREMENT WITH THE FOLIN PHENOL REAGENTJournal of Biological Chemistry, 1951