Continuous leaching of uranium by Thiobacillus ferrooxidans.

Tomizuka, Noboru; Yagisawa, Mitsuo; Someya, Jun-ichiro; Takahara, Yoshimasa

doi:10.1271/bbb1961.40.1019

Cited by 16 publications

(5 citation statements)

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“…A multi-locus sequence analysis of 21 strains of ironoxidizing acidithiobacilli carried out by Amouric et al (2011) grouped the bacteria into four distinct clusters: Group I included the type strain of A. ferrooxidans (ATCC 23270 T ), Group III included only strains of A. ferrivorans, while bacteria included in Groups II and IV appeared to be strains of two separate and distinct species. One of the 'Group II' acidithiobacilli was strain ATCC 33020 T (also referred to as strain 11Fe), which was isolated from water draining from a uranium mine in Japan (Tomizuka et al, 1976). Amouric et al (2011) noted that DNA-DNA hybridization between A. ferrooxidans ATCC 23270 T and strain ATCC 33020 T was 63 %, while Harrison (1982) had previously reported a figure of 60 % for strains ATCC 33020 T and ATCC 19859 (another 'Group I' iron-oxidizing Acidithiobacillus).…”

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confidence: 99%

Acidithiobacillus ferridurans sp. nov., an acidophilic iron-, sulfur- and hydrogen-metabolizing chemolithotrophic gammaproteobacterium

Hedrich

Johnson

2013

International Journal of Systematic and Evolutionary Microbiology

105

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Twelve strains of iron-oxidizing acidithiobacilli isolated from acidic sites throughout the world, including some previously shown by multi-locus sequence analyses and DNA-DNA hybridization to comprise a distinct species, were characterized in terms of their physiologies. The bacteria were shown to be obligately chemolithotrophic, acidophilic and mesophilic, and grew in both oxic and anoxic environments, using ferrous iron, reduced sulfur or hydrogen as electron donors and oxygen or ferric iron as electron acceptors. Some of the strains grew at lower pH than those reported for the two recognized iron-oxidizing Acidithiobacillus species, Acidithiobacillus ferrooxidans and Acidithiobacillus ferrivorans. Tolerance of transition metals and aluminium, and also specific rates of iron oxidation and reduction, were more similar to those of A. ferrooxidans (to which the strains are more closely related) than to A. ferrivorans. The name Acidithiobacillus ferridurans sp. nov. is proposed to accommodate the 12 strains, with the type strain being JCM 18981 T (5ATCC 33020 T ).

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confidence: 99%

Acidithiobacillus ferridurans sp. nov., an acidophilic iron-, sulfur- and hydrogen-metabolizing chemolithotrophic gammaproteobacterium

Hedrich

Johnson

2013

International Journal of Systematic and Evolutionary Microbiology

105

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“…Two cultures of T. ferrooxidans were tested quantitatively for their nitrogen requirement: strain 1 (27) and strain 2 (19,20). They were routinely maintained in 100-ml cultures in 250-ml flasks on a shaker at 70 strokes per min at 25°C.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen Requirement of Iron-Oxidizing Thiobacilli for Acidic Ferric Sulfate Regeneration

Tuovinen

Panda

Tsuchiya

1979

Appl Environ Microbiol

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Ammonium was shown to be a limiting nutrient for iron oxidation in cultures of Thiobacillus ferrooxidans. In addition, one strain was also able to assimilate nitrate, but not nitrite, for growth and coupled iron oxidation. Some amino acids (0.5 mM) were tested as a source of nitrogen; none clearly stimulated bacterial activity and inhibition was commonly encountered. Complex nitrogenous compounds were inhibitory at high concentrations (0.1 to 0.5%, wt/vol) and, at low concentrations, some clearly stimulated the bacterial iron oxidation in ammonium-limited cultures. Enhancement of iron oxidation by these compounds was also observed in ammonium-unlimited cultures, suggesting their possible role in providing trace nutrients and possibly carbon for the bacteria.

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“… Acidithiobacillus ferridurans is a recently described species that was formerly incorrectly identified as Acidithiobacillus ferrooxidans ( 4 ). The type strain of A. ferridurans is JCM 18981 T (=ATCC 33020 T ), which was originally isolated in 1976 from drainage water at a uranium mine in Japan ( 5 ). Compared with other strains of Acidithiobacillus , this strain exhibits high tolerance to ferrous iron ( 4 ) and superior growth with hydrogen ( 6 ).…”

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confidence: 99%