Microbial desulfurization of coal with Thiobacillus ferrooxidans bacteria

Characterization of an Operon Encoding Two c -Type Cytochromes, an aa 3 -Type Cytochrome Oxidase, and Rusticyanin in Thiobacillus ferrooxidans ATCC 33020

“…The gram-negative eubacterium Thiobacillus ferrooxidans is important for industry and ecology because (i) this microorganism is able to solubilize metals from ores, such as copper, uranium, and cobalt, and to decompose recalcitrant gold-containing ores (39) and (ii) it is able to remove heavy metals from contaminated industrial effluents or soils and to desulfurize fossil fuels to avoid corrosion and atmospheric acid depositions (7,21,22). In addition to its industrial importance, T. ferrooxidans is of fundamental interest since its way of life is one of the "most primitive extant" (8): for growth, this microorganism requires only air, which provides carbon from carbon dioxide, nitrogen, and oxygen, and ores containing ferrous iron (Fe 2ϩ ) or reduced sulfur compounds, from which it derives its energy.…”

Sensitive determination of nitrite by means of a Landolt-type reaction in fluorescent aggregates of a binaphthyl-based amphiphile

“…For obvious reasons, synthetic modelling of the matrix has often failed; so the best approach would be selective masking of nitrites and use of this solution as the blank. An attempt was made to mask nitrite with denitrifying bacteria of the Pseudomonas species [16]. Unfortunately, no satisfactory results were obtained, mainly due to the observed quenching of the amphiphile fluorescence by some lysis products of the bacteria.…”

Biodepyritisation of coal

“…Juszczak et al 86 obtained the best results for desulfurisation with T ferrooxidans on coal samples making 2.4 wt% of the extraction mixture containing coal and the media inoculated with T ferrooxidans at an initial concentration of ferrous ions of 15 g dm −3 and for a process duration of 7 days. The effect of biological desulfurisation on the combustion process of coal was found to be more significant in higher rank coal.…”

“…When the coal biodesulfurisation with T ferrooxidans and Acidianus brierleyi were compared, it was found that the rate constant for oxidation of pure pyrite by A brierleyi was higher than that for T ferrooxidans 104. Juszczak et al 86 proposed a kinetic model of Fe 2+ oxidation by T ferrooxidans during coal desulfurisation. The process was found to be described well by the equation derived from an autocatalytic reaction of the first order, both towards the inorganic substrate (Fe 2+ ) and the biocatalyst (protein).The first order rate constants obtained for Thiobacillus seem to cover a range from 0.01 to 0.32 day −1 .…”