Results 1 to 10 of about 10,116 (219)

Tetrathionate hydrolase from the acidophilic microorganisms [PDF]

Frontiers in Microbiology
Tetrathionate hydrolase (TTH) is a unique enzyme found in acidophilic sulfur-oxidizing microorganisms, such as bacteria and archaea. This enzyme catalyzes the hydrolysis of tetrathionate to thiosulfate, elemental sulfur, and sulfate.
Tadayoshi Kanao
doaj   +6 more sources

The Ecology of Acidophilic Microorganisms in the Corroding Concrete Sewer Environment [PDF]

Frontiers in Microbiology, 2017
Concrete corrosion is one of the most significant problems affecting valuable sewer infrastructure on a global scale. This problem occurs in the aerobic zone of the sewer, where a layer of surface corrosion develops on the exposed concrete and the ...
Guangming Jiang, Philip L. Bond, Xuan Li, Ulrike Kappler   +3 more
doaj   +6 more sources

Enhanced Leaching of Lepidolite by Acidophilic Microorganisms Under Mechanical Activation [PDF]

Microorganisms
In recent years, mechanical activation technology has been extensively applied as a pretreatment process to increase the leaching efficiency in hydrometallurgical mineral processing.
Jingna Li, Mengyuan Wang, Ruiyong Zhang, Hongchang Liu, Shiyun Huang, Yang Liu, Rui Liao, Arevik Vardanyan, Jinlan Xia, Jun Wang   +9 more
doaj   +4 more sources

Mechanisms of bioleaching: iron and sulfur oxidation by acidophilic microorganisms. [PDF]

Essays Biochem, 2023
Abstract Bioleaching offers a low-input method of extracting valuable metals from sulfide minerals, which works by exploiting the sulfur and iron metabolisms of microorganisms to break down the ore. Bioleaching microbes generate energy by oxidising iron and/or sulfur, consequently generating oxidants that attack sulfide mineral surfaces,
Jones S, Santini JM.
europepmc   +5 more sources

Insights into Systems for Iron-Sulfur Cluster Biosynthesis in Acidophilic Microorganisms. [PDF]

J Microbiol Biotechnol, 2022
Fe-S clusters are versatile and essential cofactors that participate in multiple and fundamental biological processes. In Escherichia coli, the biogenesis of these cofactors requires either the housekeeping Isc pathway, or the stress-induced Suf pathway which plays a general role under conditions of oxidative stress or iron limitation.
Myriam P, Braulio P, Javiera RA, Claudia MV, Omar O, Renato C, Gloria L.   +6 more
europepmc   +3 more sources

Automated Microscopic Analysis of Metal Sulfide Colonization by Acidophilic Microorganisms. [PDF]

Appl Environ Microbiol, 2018
The presented method for the assessment of mineral colonization allows accurate relative comparisons of the microbial colonization of metal sulfide concentrate particles in a time-resolved manner. Quantitative assessment of the mineral colonization development is important for the compilation of improved mathematical models for metal ...
Bellenberg S, Buetti-Dinh A, Galli V, Ilie O, Herold M, Christel S, Boretska M, Pivkin IV, Wilmes P, Sand W, Vera M, Dopson M.   +11 more
europepmc   +6 more sources

Fluoride toxicity and mitigation strategies in acidophilic bioleaching microorganisms [PDF]

Applied Microbiology and Biotechnology
Bioleaching is an established process for sulfidic ores and is increasingly applied to the recycling of industrial residues. However, unlike ores, many residues like sludge contain inhibitory elements, among which fluoride poses a major challenge due to ...
Mareike Thea Fritze, Sabrina Hedrich
doaj   +2 more sources

Co-Bioleaching of Pyrite Flotation Tailings and Crushed Printed Circuit Boards [PDF]

Molecules
The aim of this study was to investigate the potential for co-bioleaching of ground printed circuit boards (PCBs) and flotation tailings using a single-stage biohydrometallurgical process.
Aleksandr Kolosoff, Vitaliy Melamud, Aleksandr Bulaev   +2 more
doaj   +2 more sources

Biooxidation of a Pyrite-Arsenopyrite Concentrate Under Stressful Conditions [PDF]

Microorganisms
Gold recovery from refractory pyrite-arsenopyrite concentrates using stirred tank reactor biooxidation is widely applied worldwide. Therefore, studies to address the characteristic problem of this technology are urgent.
Aleksandr Bulaev, Alena Artykova, Anna Diubar, Aleksandr Kolosoff, Vitaliy Melamud, Tatiana Kolganova, Alexey Beletsky, Andrey Mardanov   +7 more
doaj   +2 more sources

Application of Acidithiobacillus ferrooxidans VKM B-3655 for bioleaching silicate ore [PDF]

E3S Web of Conferences, 2023
Acid metal bioleaching is common and classical for nickel recovery from the sulfide refractory ores: various microorganisms can oxidize sulfides as energetic substrates.
Abashina Tatiana, Noskov Aleksandr, Yachkula Alyona, Vainshtein Mikhail   +3 more
doaj   +1 more source