Open AccessThermal characterization of different isolates of Thiobacillus ferrooxidans
Author(s) -
Leduc L.G.,
Trevors J.T.,
Ferroni G.D.
Publication year - 1993
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1993.tb06097.x
Subject(s) - ferrous , thiobacillus ferrooxidans , jarosite , incubation , atmospheric temperature range , activation energy , chemistry , nuclear chemistry , mineralogy , metallurgy , materials science , biochemistry , thermodynamics , physics
Abstract Ten different isolates of Thiobacillus ferrooxidans were characterized with respect to temperature in the range 2–35°C. Four of the ten strains oxidized ferrous iron exponentially over the entire range of incubation temperatures, including the lowest temperature tested (2°C), and were therefore characterized as psychrotrophic. Jarosite production was substantially reduced at temperatures less than 10°C and was not observed at 2°C. Energy of activation values were in the range 75.2–96.6 kJ/mol°C and indicated that iron oxidation at low temperatures was governed by both a chemical and a physical control.