Uranium pollution in groundwater environment has become an important issue of global concern. In this study, a strain of Desulfovibrio desulfuricans was isolated from the tailings of acid heap leaching, and was shown to be able to remove uranium from water via biosorption, bio-reduction, passive biomineralization under uranium stress, and active metabolically dependent bioaccumulation. This research explored the effects of nutrients, pH, initial uranium and sulfate concentration on the functional groups, uranium valence, and crystal size and morphology of uranium immobilization products. Results showed that tetravalent and hexavalent phosphorus-containing uranium minerals was both formed. In sulfate-containing water where Desulfovibrio desulfuricans A3-21ZLL can grow, the sequestration of uranium by bio-reduction was significantly enhanced compared to that with no sulfate loading or no growth. Ungrown Desulfovibrio desulfuricans A3-21ZLL or dead ones released inorganic phosphate group in response to the stress of uranium, which associated with soluble uranyl ion to form insoluble uranium-containing precipitates. This study revealed the influence of hydrochemical conditions on the mineralogy characteristics and spatial distribution of microbial uranium immobilization products. This study is conducive to the long-term and stable bioremediation of groundwater in decommissioned uranium mining area.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envres.2023.116950 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Polymicrobial bacteremia including Ignatzschineria indica caused by myiasis in a female patient with carcinoma of unknown primary.
J Infect Chemother
January 2025
Department of Clinical Laboratory, Kanazawa Medical University Hospital, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa 920-0293, Japan; Department of Infectious Diseases, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku, Ishikawa, 920-0293, Japan. Electronic address:
A 70-year-old woman with a 6-month history of poor hygiene presented with a right occipital mass, ulceration, and neck swelling. The right occipital region was infested with approximately 100 fly maggots, and the mass contained a foul-smelling abscess. Maggots were removed, and the mass was drained, irrigated, and dressed with padding.
View Article and Find Full Text PDFPb alleviates As mobilization during the biological reductive dissolution of Pb-As jarosite.
Environ Pollut
December 2024
Institute of Environmental Science and Engineering, School of Metallurgy and Environment, Central South University, 410083, Changsha, China. Electronic address:
The biological dissolution of jarosite accelerates As mobilization in acid mine drainage environments, which can be influenced by coexisting metals. However, few studies have focused on the effects of coexisting Pb on this biogeochemical process. Here, we investigated the behavior of As during the reductive dissolution of Pb-As jarosite (PbFe(SO, AsO)(OH)) by a sulfate-reducing bacterium (SRB) of Desulfovibrio desulfuricans.
View Article and Find Full Text PDFPhotoelectron-Promoted Sulfate Reduction for Heavy Metal Removal without Organic Carbon Addition.
Environ Sci Technol
December 2024
The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Sulfate-reducing microorganisms (SRMs) show promise for heavy metal removal from contaminated environments, but their scalability is limited by reliance on organic carbon, sludge formation, and CO emissions. This study investigates using photoelectrons from biogenic (Bio-ZnS) and abiogenic (Abio-ZnS) sphalerite nanoparticles to enhance the activity of G20 (G20) for sulfate reduction and lead removal without organic substrates. Both Abio-ZnS and Bio-ZnS NPs promote sulfate reduction and energy production in G20 cells under illumination without the addition of organic substrates, with Bio-ZnS achieving 1.
View Article and Find Full Text PDFPhotoelectron-promoted metabolism of sulphate-reducing microorganisms in substrate-depleted environments.
Environ Microbiol
October 2024
The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing, China.
Sulphate-reducing microorganisms, or SRMs, are crucial to organic decomposition, the sulphur cycle, and the formation of pyrite. Despite their low energy-yielding metabolism and intense competition with other microorganisms, their ability to thrive in natural habitats often lacking sufficient substrates remains an enigma. This study delves into how Desulfovibrio desulfuricans G20, a representative SRM, utilizes photoelectrons from extracellular sphalerite (ZnS), a semiconducting mineral that often coexists with SRMs, for its metabolism and energy production.
View Article and Find Full Text PDFBloodstream co-infection with and in a patient with a flare of ulcerative colitis - A case report and review of the literature.
IDCases
September 2024
Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
was isolated in 2002 from the blood of a patient with appendicitis. We report a bacteremia with and in a patient with ulcerative colitis. grew in thioglycolate media and identification was confirmed with 16S rRNA sequencing.
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!