Kinetic rate constant for electron transfer between ferrous ions and novel Rusticyanin isoform in Acidithiobacillus ferrooxidans

Ida, Chigusa; Sasaki, Kazuhiro; Ando, Kikazu; Blake, Robert C.; Saiki, Hiroshi; Ohmura, Naoya

doi:10.1016/s1389-1723(03)80057-9

Cited by 13 publications

(1 citation statement)

References 22 publications

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“…During autotrophic growth on iron, bacteria obtain energy through the oxidation of ferrous ion to ferric ion, and energy transduction is catalyzed by protein, such as rusticyanin, which participates in the ferrous oxidation pathway [21, 22]. In this study, the total protein activity was determined by a two-point inverse calibration method, and the results were shown in Figure 4(c).…”

Section: Resultsmentioning

confidence: 99%

Bioleaching of Arsenic-Rich Gold Concentrates by Bacterial Flora before and after Mutation

Xie

Yuan

Liu

et al. 2013

BioMed Research International

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In order to improve the bioleaching efficiency of arsenic-rich gold concentrates, a mixed bacterial flora had been developed, and the mutation breeding method was adopted to conduct the research. The original mixed bacterial flora had been enrichedin acid mine drainage of Dexing copper mine, Jiangxi Province, China. It was induced by UV (ultraviolet), ultrasonic, and microwave, and their combination mutation. The most efficient bacterial flora after mutation was collected for further bioleaching of arsenic-rich gold concentrates. Results indicated that the bacterial flora after mutation by UV 60 s combined with ultrasonic 10 min had the best oxidation rate of ferrous, the biggest density of cells, and the most activity of total protein. During bioleaching of arsenic-rich gold concentrates, the density of the mutant bacterial cells reached to 1.13 × 108 cells/mL at 15 days, more than 10 times compared with that of the original culture. The extraction of iron reached to 95.7% after 15 days, increased by 9.9% compared with that of the original culture. The extraction of arsenic reached to 92.6% after 12 days, which was increased by 46.1%. These results suggested that optimum combined mutation could improve leaching ability of the bacterial flora more significantly.

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Section: Resultsmentioning

confidence: 99%

Bioleaching of Arsenic-Rich Gold Concentrates by Bacterial Flora before and after Mutation

Xie

Yuan

Liu

et al. 2013

BioMed Research International

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Electrochemical mechanism of rusticyanin (Rus.) isolated from A. ferrooxidans measured by Rus.-ZnS-QDs/L-Cys/Au electrode

Sun

Miao

et al. 2011

J. Cent. South Univ. Technol.

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Electrochimcal behaviors of rusticyanin (Rus.) isolated from Acidithiobacillus ferrooxidans were investigated through Rus.-ZnS-QDs/L-Cys/Au electrode. The cyclic voltammetric results indicate that rusticyanin immobilized on the surface of Rus.-ZnS-QDs/L-Cys/Au electrode can undergo a direct quasi-reversible electrochemical reaction. The immobilized rusticyanin is not denatured and still retains its activity in the temperature range of 19−43 °C. The reduction ability of the protein increases and its oxidation ability becomes weak with the increase of pH from 6.0 to 7.8. Fe 2+ ions in the solution can promote the electron transfer kinetics of the immobilized rusticyanin and make its peak potentials (φ p ) markedly move negatively.

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Iron oxidizing bacteria: insights on diversity, mechanism of iron oxidation and role in management of metal pollution

Singh

et al. 2018

Environmental Sustainability

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Kinetic rate constant for electron transfer between ferrous ions and novel Rusticyanin isoform in Acidithiobacillus ferrooxidans

Cited by 13 publications

References 22 publications

Bioleaching of Arsenic-Rich Gold Concentrates by Bacterial Flora before and after Mutation

Bioleaching of Arsenic-Rich Gold Concentrates by Bacterial Flora before and after Mutation

Electrochemical mechanism of rusticyanin (Rus.) isolated from A. ferrooxidans measured by Rus.-ZnS-QDs/L-Cys/Au electrode

Iron oxidizing bacteria: insights on diversity, mechanism of iron oxidation and role in management of metal pollution

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