Elemental Sulfur Oxidation in Acidiphilium spp.

2007 ◽  
Vol 20-21 ◽  
pp. 583-583 ◽  
Author(s):  
Thore Rohwerder ◽  
Claudia Janosch ◽  
Wolfgang Sand
Keyword(s):  
Elemental Sulfur ◽  
Carbon Sources ◽  
Sulfur Oxidation ◽  
Oxidation Potential ◽  
Inorganic Sulfur ◽  
Chemolithotrophic Growth ◽  
Leaching Bacteria ◽  
New Feature ◽  
Inorganic Sulfur Compound ◽  
Elemental Sulfur Oxidation

The alpha-proteobacterial genus Acidiphilium consists of several acidophilic species, generally known as a part of the mesophilc microbial flora of leaching biotopes. All of them can grow chemoorganotrophically on carbon sources like sugars and many express additional photosynthetic pigments. Thus far, only Ap. acidophilum is known to be capable of chemolithotrophic growth on elemental sulfur oxidation. The oxidation potential of inorganic sulfur species by the other strictly heterotrophic species has not yet been thoroughly investigated. Here, we demonstrate the unequivocal evidence of inorganic sulfur compound oxidation by strains of Ap. cryptum and other Acidiphilium species. Evolutionary and biochemical aspects of this new feature among the heterotrophic Acidiphilium spp. are discussed. This finding will possibly help to solve the long-standing question about the biochemical nature of elemental sulfur oxidation in mesophilic leaching bacteria.

scholarly journals Distinct Roles of Acidophiles in Complete Oxidation of High-Sulfur Ferric Leach Product of Zinc Sulfide Concentrate

2020 ◽  
Vol 8 (3) ◽  
pp. 386 ◽  
Author(s):  
Maxim Muravyov ◽  
Anna Panyushkina
Keyword(s):  
Microbial Community ◽  
Zinc Sulfide ◽  
Elemental Sulfur ◽  
Waste Product ◽  
Sulfur Oxidation ◽  
Low Grade ◽  
Sulfide Concentrates ◽  
Sulfide Concentrate ◽  
Elemental Sulfur Oxidation ◽  
Ferric Leaching

A two-step process, which involved ferric leaching with biologically generated solution and subsequent biooxidation with the microbial community, has been previously proposed for the processing of low-grade zinc sulfide concentrates. In this study, we carried out the process of complete biological oxidation of the product of ferric leaching of the zinc concentrate, which contained 9% of sphalerite, 5% of chalcopyrite, and 29.7% of elemental sulfur. After 21 days of biooxidation at 40 °C, sphalerite and chalcopyrite oxidation reached 99 and 69%, respectively, while the level of elemental sulfur oxidation was 97%. The biooxidation residue could be considered a waste product that is inert under aerobic conditions. The results of this study showed that zinc sulfide concentrate processing using a two-step treatment is efficient and promising. The microbial community, which developed during biooxidation, was dominated by Acidithiobacillus caldus, Leptospirillum ferriphilum, Ferroplasma acidiphilum, Sulfobacillus thermotolerans, S. thermosulfidooxidans, and Cuniculiplasma sp. At the same time, F. acidiphilum and A. caldus played crucial roles in the oxidation of sulfide minerals and elemental sulfur, respectively. The addition of L. ferriphilum to A. caldus during biooxidation of the ferric leach product proved to inhibit elemental sulfur oxidation.

Utilisation of Inorganic Substrates by Alicyclobacillus - Like Strain FP1

2015 ◽  
Vol 1130 ◽  
pp. 308-311 ◽  
Author(s):  
Helen R. Watling ◽  
David M. Collinson ◽  
Felicity A. Perrot ◽  
Denis W. Shiers
Keyword(s):  
Growth Factor ◽  
Yeast Extract ◽  
Elemental Sulfur ◽  
Sulfur Compound ◽  
Growth Media ◽  
Inorganic Sulfur ◽  
Inorganic Substrates ◽  
Water Ph ◽  
Abiotic Controls ◽  
Inorganic Sulfur Compound

As Alicyclobacillus-like strain FP1 was isolated from copper heap process water (pH 1.5), this research was directed towards its bioleaching attributes, specifically ferrous ion (Fe (II)) and reduced inorganic sulfur compound (RISC) oxidation, and bioleaching of sulfide minerals. Strain FP1 oxidised iron (II) but not tetrathionate or elemental sulfur in growth media containing yeast extract as growth factor. The addition of tetrathionate (2.5 mM) suppressed iron (II) oxidation. Strain FP1 grew on pyrite, arsenopyrite, chalcopyrite, sphalerite and pentlandite in BSM-YE medium at 30 °C and pH 1.8 (35 days), enhancing Zn, Co (in cobaltiferous pyrite), Fe and As recovery, but not Cu or Ni, relative to abiotic controls.

Kinetic model of elemental sulfur oxidation by

1998 ◽  
Vol 18 (4) ◽  
pp. 241 ◽  
Author(s):  
R. Gourdon ◽  
N. Funtowicz
Keyword(s):  
Kinetic Model ◽  
Elemental Sulfur ◽  
Sulfur Oxidation ◽  
Elemental Sulfur Oxidation

Respirometric characterization of aerobic sulfide, thiosulfate and elemental sulfur oxidation by S-oxidizing biomass

2016 ◽  
Vol 89 ◽  
pp. 282-292 ◽  
Author(s):  
Mabel Mora ◽  
Luis R. López ◽  
Javier Lafuente ◽  
Julio Pérez ◽  
Robbert Kleerebezem ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Sulfur Oxidation ◽  
Elemental Sulfur Oxidation

Magnesium fertiliser dissolution rates in pumice soils under Pinus radiata

Soil Research ◽  
2000 ◽  
Vol 38 (3) ◽  
pp. 753 ◽  
Author(s):  
A. D. Mitchell ◽  
P. Loganathan ◽  
T. W. Payn ◽  
R. W. Tillman
Keyword(s):  
Particle Size ◽  
Dissolution Rate ◽  
Pinus Radiata ◽  
Rate Constants ◽  
Elemental Sulfur ◽  
Sulfur Oxidation ◽  
Rate Of Dissolution ◽  
Cubic Model ◽  
Dissolution Rate Constants ◽  
Elemental Sulfur Oxidation

Application of Mg fertilisers has been suggested as a means of reducing the incidence of Mg deficiency of forest trees in New Zealand and Europe. The objective of this study was to determine the rates of dissolution of a range of Mg fertilisers applied to a pumice soil (Typic Udivitrand). The rate of fertiliser dissolution was little influenced by whether the fertiliser was applied directly on to the soil surface (litter removed) or on to the litter layer in a Pinus radiata plantation. Twenty-seven months since fertiliser application the mean (with and without litter) percentage of Mg dissolved was in the sequence: Epsom salts > calcined magnesite 1–2 mm > granmag (a partially acidulated and granulated calmag product) > calcined magnesite 2–4 mm > forestry grade dolomite. The specific dissolution rate constants (mg/cm2 .day of fertiliser) for the slowly soluble Mg fertilisers calculated using an elemental sulfur oxidation cubic model were 587 for calcined magnesite 1–2 mm, 426 for calcined magnesite 2–4 mm, 385 for granmag, and 18 for forestry grade dolomite. In a laboratory incubation study the elemental sulfur oxidation cubic model described the rate of dissolution of Mg fertilisers within narrow fertiliser particle size ranges. The specific fertiliser dissolution rate constants, however, increased with decreases in particle size, suggesting that the rate of dissolution depends on factors other than surface area when particle sizes varied widely. Slowly soluble, alkaline Mg fertilisers had a significant liming effect on the soil. They were more effective in increasing soil exchangeable Mg than soluble Mg salts over a long-period and therefore, they are better fertilisers for P. radiata.

ELEMENTAL SULFUR OXIDATION AS INFLUENCED BY PLANT GROWTH AND DEGREE OF DISPERSION WITHIN SOIL

1990 ◽  
Vol 70 (3) ◽  
pp. 499-502 ◽  
Author(s):  
H. H. JANZEN
Keyword(s):  
Plant Growth ◽  
Key Words ◽  
Oxidation Rate ◽  
Elemental Sulfur ◽  
Sulfur Oxidation ◽  
Particle Dispersion ◽  
Controlled Environment ◽  
Oxidation Rates ◽  
S Oxidation ◽  
Elemental Sulfur Oxidation

Controlled environment studies were conducted to characterize the effects of cropping treatment and degree of particle dispersion on S oxidation rate. In two soils (a Chernozem and a Luvisol), S oxidation rates were not greatly affected by cropping treatment (barley, beans, canola, or fallow). In a second experiment, S oxidation was shown to approach maximum rates at a dispersion level of 1000 g soil g−1 S. Key words: Sulfur, placement, rhizosphere, fertilizer, elementals

Sulfur Oxidation and Coupled Iron Reduction at Low Temperatures

2007 ◽  
Vol 20-21 ◽  
pp. 584-584 ◽  
Author(s):  
Daniel Kupka ◽  
Mark Dopson ◽  
Olli H. Tuovinen
Keyword(s):  
Acidithiobacillus Ferrooxidans ◽  
Low Temperatures ◽  
Iron Reduction ◽  
Elemental Sulfur ◽  
Surface Soil ◽  
Sulfur Oxidation ◽  
Oxygen Limitation ◽  
Northern Siberia ◽  
Elemental Sulfur Oxidation

The purpose of this work was to characterize elemental sulfur oxidation by a psychrotrophic Acidithiobacillus ferrooxidans culture that originated from an AMD-impacted surface soil in a permafrost area in northern Siberia. In this work, the iron-oxidizing culture was cultivated with elemental sulfur with and without Fe2+ or Fe3+ in flasks on a shaker to avoid oxygen limitation.

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