AI Article Synopsis
Article Abstract
Bioleaching, like Biotechnology uses microorganisms to extract metals from their ore materials, whereas microbial activity has an appreciable effect on the dissolution of toxic metals and radionuclides. Bioleaching of uranium was carried out with isolated fungi from uraniferous sedimentary rocks from Southwestern Sinai, Egypt. Eight fungal species were isolated from different grades of uraniferous samples. The bio-dissolution experiments showed that Aspergillus niger and Aspergillus terreus exhibited the highest leaching efficiencies of uranium from the studied samples. Through monitoring the bio-dissolution process, the uranium grade and mineralogic constituents of the ore material proved to play an important role in the bioleaching process. The tested samples asserted that the optimum conditions of uranium leaching are: 7 days incubation time, 3% pulp density, 30 °C incubation temperature and pH 3. Both fungi produced the organic acids, namely; oxalic, acetic, citric, formic, malonic, galic and ascorbic in the culture filtrate, indicating an important role in the bioleaching processes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jenvrad.2014.02.024 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Sulfur enhancement effects for uranium bioleaching in column reactors from a refractory uranium ore.
Front Microbiol
January 2023
School of Resources and Environment and Safety Engineering, University of South China, Hengyang, China.
The feasibility of sulfur enhancement for uranium bioleaching in column reactors was assessed with a designed mixed and from a refractory uranium ore. The uranium extraction reached 86.2% with the sulfur enhancement (1 g/kg) in 77 days leaching process, increased by 12.
View Article and Find Full Text PDFProgress in bioleaching: part B, applications of microbial processes by the minerals industries.
Appl Microbiol Biotechnol
September 2022
Federal Institute for Geosciences and Natural Resources (BGR), Geomicrobiology Unit, Resource Geochemistry, Stilleweg 2 30655, Hannover, Germany.
This review provides an update to the last mini-review with the same title pertaining to recent developments in bioleaching and biooxidation published in 2013 (Brierley and Brierley). In the intervening almost 10 years, microbial processes for sulfide minerals have seen increased acceptance and ongoing but also declining commercial application in copper, gold, nickel and cobalt production. These processes have been applied to heap and tank leaching, nowadays termed biomining, but increasing concerns about the social acceptance of mining has also seen the re-emergence of in situ leaching and quest for broader applicability beyond uranium and copper.
View Article and Find Full Text PDFRemediation techniques for uranium removal from polluted environment - Review on methods, mechanism and toxicology.
Environ Pollut
June 2022
Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea.
Uranium, a radionuclide, is a predominant element utilized for speciality requirements in industrial applications, as fuels and catalyst. The radioactive properties and chemical toxicity of uranium causes a major threat to the ecosystem. The hazards associated with Uranium pollution includes the cancer in bones, liver, and lungs.
View Article and Find Full Text PDFInvestigating the rus and petI operon expression patterns in exposed Acidithiobacillus ferrooxidans sp. FJ2 to different doses of gamma irradiation.
Appl Radiat Isot
November 2021
Young Researchers and Elite Club, Karaj Branch, Islamic Azad University, Karaj, Iran.
The bioleaching process is developing as an economic and successful biotechnology method in the metallurgy industry. Acidithiobacillus ferrooxidans is one of the most important bacteria involved in uranium bioleaching which converts insoluble U to soluble U by oxidation of Fe to Fe using several periplasmic proteins encoded by the genes in rus and petI operons in its electron transport pathway. Accordingly, the purpose of this study was to consider the expression of these genes through exposed A.
View Article and Find Full Text PDFBioleaching Studies of Uranium in a Rock Sample from Sinai Using Some Native Streptomyces and Aspergillus Species.
Curr Microbiol
February 2021
Geochemical Exploration Department, Nuclear Materials Authority, Qattamia, Cairo, Postal code 11936, Egypt.
Sinai's important geographical and strategic position is attracting researchers to explore opportunities to maximize exploitation of its treasures, especially in the area of sustainable development. One of the fields of exploitation is extracting valuable metals from low-grade ores using green technologies. In this study, we examined the possibility of microbial leaching of uranium (U) from a rock sample collected from Wadi Naseib, Sinai, Egypt.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!