Results 31 to 40 of about 669 (156)
Engineering Biology, Volume 6, Issue 1, Page 23-34, March 2022., 2022 Abstract In the face of a burgeoning stream of e‐waste globally, e‐waste recycling becomes increasingly imperative, not only to mitigate the environmental and health risks it poses but also as an urban mining strategy for resource recovery of precious metals, rare Earth elements, and even plastics.
Ping Han, Wei Zhe Teo, Wen Shan Yew
wiley +1 more source
Microbial leaching of marmatite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans
Transactions of Nonferrous Metals Society of China, 2006 The bioleaching of marmatite in shaken flasks was studied. After leaching for 29 days, the leaching ratio of zinc was 91%. Three kinds of bacteria, mixture-based bacteria, 9K-based bacteria and sulfur-based bacteria were used in marmatite leaching, of which the mixture-based bacteria have the best leaching result while the sulfur-based bacteria have ...
Jun WANG +3 more
openaire +1 more source
Advances in Materials Science and Engineering, Volume 2022, Issue 1, 2022., 2022 This paper reports study findings on the use of Lysinibacillus sphaericus (at 1.0 × 107 cells/ml concentration) to enhance and improve the physicomechanical and chemical properties of blended Ordinary Portland Cement (OPC). Blending was done separately with pulverized fly ash (PFA) and natural pozzolana (volcanic tuff) at substitution levels of 10%, 20%
Kelvin Mwangi Wanjiku +11 more
wiley +1 more source
Sulfur enhancement effects for uranium bioleaching in column reactors from a refractory uranium ore
Frontiers in Microbiology, 2023 The feasibility of sulfur enhancement for uranium bioleaching in column reactors was assessed with a designed mixed Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferriphilum from a refractory uranium ore.
Qian Li +17 more
doaj +1 more source
Bioleaching of hexavalent chromium from soils using Acidithiobacillus thiooxidans [PDF]
Journal of Biotechnology, 2010 The continuous and growing degradation of the environment, due to several anthropogenic activities , is a main concern of the scientific community. Consequently, the development of low cost techniques to clean air, water and soils are under intense investigation. In this study, the focused problem is the soil contamination by hexavalent chromium, which
Fonseca, Bruna +3 more
openaire +3 more sources
Microbial Recovery and Kinetic Study of Vanadium Dissolution from Pure Vanadium Oxide in Order to Extract it from Uranium Ore Residues [PDF]
مجله علوم و فنون هستهای, 2013 Vanadium is an expensive and practical metal in different industries, and in Iran, in particular uranium ore residues contain a considerable amount of this metal.
S. J Safdari +3 more
doaj
BMC Genomics, 2008 Background Carbon and nitrogen fixation are essential pathways for autotrophic bacteria living in extreme environments. These bacteria can use carbon dioxide directly from the air as their sole carbon source and can use different sources of nitrogen such
Ehrenfeld Nicole +4 more
doaj +1 more source
Genetic variability in Acidithiobacillus spp. – a working horse of environmental biotechnologies
Nova Biotechnologica et Chimica, 2018 The genus Acidithiobacillus comprises 7 species of Gram-negative obligatory acidophilic chemolithotrophic bacteria that derive energy mainly from the oxidation of reduced sulphur compounds. Four of the species also catalyse the dissimilatory oxidation of
Pristas Peter +6 more
doaj +1 more source
Potentiality of Acidithiobacillus thiooxidans in Microbial Solubilization of Phosphate Mine Tailings [PDF]
Journal of Degraded and Mining Lands Management, 2015 This paper deals with the solubilization behavior of the tailings produced by the floatation of a complex low grade phosphate ore. The composition of the tailings was essentially dolomite (52.04%) with minor amounts of phosphate, iron and aluminium ...
S Dhakar, N Ali, R S Chauhan, V Yadav
doaj +1 more source
Purification and Properties of Thiosulfate Dehydrogenase from Acidithiobacillus thiooxidans JCM7814
Bioscience, Biotechnology, and Biochemistry, 2001 A key enzyme of the thiosulfate oxidation pathway in Acidithiobacillus thiooxidans JCM7814 was investigated. As a result of assaying the enzymatic activities of thiosulfate dehydrogenase, rhodanese, and thiosulfate reductase at 5.5 of intracellular pH, the activity of thiosulfate dehydrogenase was measured as the key enzyme.
NAKAMURA, Kazuo +3 more
openaire +2 more sources