Results 121 to 130 of about 669 (156)

Biofiltration of H2S-rich biogas using Acidithiobacillus thiooxidans

Clean Technologies and Environmental Policy, 2015
Biogas has limited use in energy generation mainly due to the presence of hydrogen sulfide (H2S). Currently, most of the techniques employed in the removal of H2S from biogas have a chemical base, with high material costs and generating secondary pollutants.
Michel Brondani, Laura Bedin Denardi, Flavio Mayer   +2 more
exaly   +2 more sources

Reduction of vanadium(V) with Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans

Bioresource Technology, 2004
Biotechnological leaching has been proposed as a suitable method for extraction of vanadium from spent catalysts and oil ash. In the biological leaching process, the vanadium(V) can be reduced to vanadium(IV), which is a less toxic and more soluble form of the vanadium.
Katarina, Bredberg, Hans T, Karlsson, Olle, Holst   +2 more
openaire   +2 more sources

Reduction of uranium(VI) by Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans

Hydrometallurgy, 2010
Interaction of Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans with soluble uranium(VI) was studied. Acidithiobacillus thiooxidans aerobic cultures showed considerable decrement of uranium in solution when pH was set to 4 with KOH. This condition stabilized polythionates produced as a result of the oxidative sulphur metabolism and ...
R.M. Gargarello, D. Di Gregorio, H. Huck, J. Fernandez Niello, G. Curutchet   +4 more
openaire   +1 more source

Oxidation of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans in shake flasks

Process Biochemistry, 2002
Abstract Chalcopyrite oxidation was evaluated with two acidophilic thiobacilli that are important in bioleaching processes. Acidithiobacillus thiooxidans in pure culture did not oxidize CuFeS2 but oxidized externally added S0 in the presence of CuFeS2.
Bevilaqua, D., Leite, ALLC, Garcia, O., Tuovinen, O. H.   +3 more
openaire   +2 more sources

The inhibitory effect of antimicrobial zeolite on the biofilm of Acidithiobacillus thiooxidans

Biodegradation, 2009
The inhibitory effect of antimicrobial zeolite coated concrete specimens (Z2) against Acidithiobacillus thiooxidans was studied by measuring biomass dry cell weight (DCW), biological sulphate generation, and oxygen uptake rates (OURs). Uncoated (UC), and blank zeolite coated without antimicrobial agent (ZC) concrete specimens were used as controls. The
Tesfaalem, Haile, George, Nakhla
openaire   +2 more sources

Oxidation of isochemical FeS2 (marcasite–pyrite) by Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans

Minerals Engineering, 2007
Abstract A research-grade mineral sample that contained marcasite and pyrite (FeS 2 ) was subjected to the oxidation by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans . Oxidation of FeS 2 by A. ferrooxidans produced acid, and the redox potential increased with sulfide dissolution and the oxidation of Fe 2+ .
Garcia, Oswaldo, Bigham, Jerry M., Tuovinen, I. H.   +2 more
openaire   +2 more sources

Adhesion forces between cells of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans or Leptospirillum ferrooxidans and chalcopyrite

Colloids and Surfaces B: Biointerfaces, 2012
The efficiency of copper leaching is improved by bacteria attached to chalcopyrite. Therefore, the study of the attachment mechanism to control leaching is important. The adhesion of three species of leaching microorganisms including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans to chalcopyrite was ...
Zhu, Jianyu, Li, Qian, Jiao, Weifeng, Jiang, Hao, Sand, Wolfgang, Xia, Jinlan, Liu, Xueduan, Qin, Wenqing, Qiu, Guanzhou, Hu, Yuehua, Chai, Liyuan   +10 more
openaire   +2 more sources

Solubilization of a K-silicate rock by Acidithiobacillus thiooxidans

Minerals Engineering, 2019
Abstract Sulfur-oxidizing bacteria are used in bioleaching processes to recover metals such as gold and copper. The mechanisms for solubilizing metals used by the bacterium Acidithiobacillus thiooxidans involve sulfur oxidation reactions, with the consequent formation of acid.
Patrícia Cardoso Matias, Edson Marcio Mattiello, Wedisson Oliveira Santos, Jorge Luis Badel, Víctor Hugo Alvarez V.   +4 more
openaire   +1 more source

Bioleaching of metals from printed wire boards by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans and their mixture

Journal of Hazardous Materials, 2009
Bioleaching processes were used to mobilize metals from printed wire boards (PWBs). The bacteria Acidithiobacillus ferrooxidans (A. ferrooxidans) and Acidithiobacillus thiooxidans (A. thiooxidans) isolated from an acidic mine drainage were grown and acclimated in presence of PWBs and then used as bioleaching bacteria to solubilize metals from PWBs. The
Jingwei, Wang, Jianfeng, Bai, Jinqiu, Xu, Bo, Liang   +3 more
openaire   +2 more sources

Biomachining rates of various metals by Acidithiobacillus thiooxidans

International Journal of Surface Science and Engineering, 2012
The evaluation of a potential of a microorganism for the biomachining technology is conducted in the current study. As the fundamental step, the specific metal removal rates (SMRR) of copper, nickel and aluminium in use of different level of cell concentration of Acidithiobacillus thiooxidans (At.
Hong Hocheng, U.U. Jadhav, J.H. Chang
openaire   +1 more source