scholarly journals Bacteriophage inactivation as a function of ferrous iron oxidation

2019 ◽  
Vol 5 (7) ◽  
pp. 1309-1317 ◽  
Author(s):  
Joe Heffron ◽  
Brad McDermid ◽  
Brooke K. Mayer
Keyword(s):  
Ferrous Iron ◽  
Low Cost ◽  
Iron Oxidation ◽  
Ferrous Iron Oxidation ◽  
Iron Based

Iron-based disinfection has been promoted as a potential low-cost, low-byproduct means of virus mitigation.

Ferrous iron oxidation in moderately thermophilic acidophile Sulfobacillus sibiricus N1T

2010 ◽  
Vol 56 (10) ◽  
pp. 803-808 ◽  
Author(s):  
Tatiana Y. Dinarieva ◽  
Anna E. Zhuravleva ◽  
Oksana A. Pavlenko ◽  
Iraida A. Tsaplina ◽  
Alexander I. Netrusov
Keyword(s):  
Ferrous Iron ◽  
High Performance ◽  
Iron Oxidation ◽  
Early Exponential Phase ◽  
Moderately Thermophilic ◽  
Terminal Oxidases ◽  
Cytochrome Bo ◽  
Ferrous Iron Oxidation ◽  
Transport Chain ◽  
Membrane Bound

The iron-oxidizing system of a moderately thermophilic, extremely acidophilic, gram-positive mixotroph, Sulfobacillus sibiricus N1T, was studied by spectroscopic, high-performance liquid chromatography and inhibitory analyses. Hemes B, A, and O were detected in membranes of S. sibiricus N1T. It is proposed that the electron transport chain from Fe2+ to O2 is terminated by 2 physiological oxidases: aa3-type cytochrome, which dominates in the early-exponential phase of growth, and bo3-type cytochrome, whose role in iron oxidation becomes more prominent upon growth of the culture. Both oxidases were sensitive to cyanide and azide. Cytochrome aa3 was more sensitive to cyanide and azide, with Ki values of 4.1 and 2.5 µmol·L–1, respectively, compared with Ki values for cytochrome bo3, which were 9.5 µmol·L–1 for cyanide and 7.0 µmol·L–1 for azide. This is the first evidence for the participation of a bo3-type oxidase in ferrous iron oxidation. The respiratory chain of the mixotroph contains, in addition to the 2 terminal oxidases, a membrane-bound cytochrome b573.

scholarly journals A kinetic model of ferrous iron oxidation by Acidithiobacillus ferrooxidans in a batch culture

2005 ◽  
Vol 11 (2) ◽  
pp. 59-62 ◽  
Author(s):  
Dragisa Savic ◽  
Miodrag Lazic ◽  
Vlada Veljkovic ◽  
Miroslav Vrvic
Keyword(s):  
Kinetic Model ◽  
Acidithiobacillus Ferrooxidans ◽  
Ferrous Iron ◽  
Bubble Column ◽  
Iron Oxidation ◽  
Yield Coefficient ◽  
Transfer Rates ◽  
Ferrous Iron Oxidation ◽  
Menten Kinetic ◽  
Kinetics Of

The batch oxidation kinetics of ferrous iron by Acidithiobacillus ferrooxidans were examined at different oxygen transfer rates and pH in an aerated stirred tank and a bubble column. The microbial growth, oxygen consumption rate and ferrous and ferric iron were monitored during the biooxidation. A kinetic model was established on the basis of the Michaelis-Menten kinetic equation for bacterial growth and the constants estimated from experimental data (maximum specific growth rate 0.069 h-1, saturation constant 2.9 g/dm3, and biomass yield coefficient based on ferrous iron 0.003 gd.w./gFe). Values calculated from the model agreed well with the experimental ones regardless of the bioreactor type and pH conditions.

Iron targeted transcriptome study draws attention to novel redox protein candidates involved in ferrous iron oxidation in “Ferrovum” sp. JA12

2018 ◽  
Vol 169 (10) ◽  
pp. 618-627 ◽  
Author(s):  
Sophie R. Ullrich ◽  
Anja Poehlein ◽  
Gloria Levicán ◽  
Martin Mühling ◽  
Michael Schlömann
Keyword(s):  
Ferrous Iron ◽  
Iron Oxidation ◽  
Redox Protein ◽  
Ferrous Iron Oxidation

scholarly journals Increasing cell concentration does not affect specific ferrous iron oxidation rate in a continuously stirred tank bioreactor

2018 ◽  
Vol 181 ◽  
pp. 189-194
Author(s):  
Naomi J. Boxall ◽  
Ka Yu Cheng ◽  
Chris A. du Plessis ◽  
David Collinson ◽  
Christina Morris ◽  
...  
Keyword(s):  
Oxidation Rate ◽  
Ferrous Iron ◽  
Cell Concentration ◽  
Iron Oxidation ◽  
Stirred Tank ◽  
Stirred Tank Bioreactor ◽  
Ferrous Iron Oxidation

Effects of the oxygen transfer rate on ferrous iron oxidation by Thiobacillus ferrooxidans

1998 ◽  
Vol 23 (7-8) ◽  
pp. 427-431 ◽  
Author(s):  
D.S Savić ◽  
V.B Veljković ◽  
M.L Lazić ◽  
M.M Vrvić ◽  
J.I Vučetić
Keyword(s):  
Oxygen Transfer ◽  
Ferrous Iron ◽  
Transfer Rate ◽  
Thiobacillus Ferrooxidans ◽  
Iron Oxidation ◽  
Oxygen Transfer Rate ◽  
Ferrous Iron Oxidation

scholarly journals Arsenic removal from arsenic-contaminated water by biological arsenite oxidation and chemical ferrous iron oxidation using a down-flow hanging sponge reactor

2017 ◽  
Vol 17 (5) ◽  
pp. 1249-1259 ◽  
Author(s):  
Nao Kamei-Ishikawa ◽  
Nami Segawa ◽  
Daisuke Yamazaki ◽  
Ayumi Ito ◽  
Teruyuki Umita
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Iron Hydroxide ◽  
Iron Oxidation ◽  
Quality Standards ◽  
Small Scale ◽  
Contaminated Water ◽  
Water Quality Standards ◽  
Ferrous Iron Oxidation ◽  
Arsenite Oxidizing Bacteria

The down-flow hanging sponge (DHS) reactor was used for continuous As removal treatment of As-contaminated water. The treatment scheme was: (1) As(III) in contaminated water is oxidized by arsenite-oxidizing bacteria fixed in the sponges in the reactor; (2) Fe(II) naturally existing in the water is oxidized by dissolved oxygen; (3) Fe(III) is precipitated as iron hydroxide and As(V) is co-precipitated with the iron hydroxide; and finally (4) the co-precipitates are fixed in the sponges. This system could remove As from As-contaminated water on a small scale and at low cost. The results showed that, after using the DHS reactor, As and Fe concentrations in the treated water were lower than water quality standards for drinking water when Fe(II) concentration in the influent was lower than 10 mg/L and the Fe/As ratio was higher than 6.67–8.42, with dependence on the Fe concentration. Additionally, even if Fe concentration is higher than 10 mg/L, the treatment system is still applicable if the pH of the influent is higher than 7 or the retention time is longer than 2 h.

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