ArticleApplied and environmental microbiology2014
Enhanced uranium immobilization and reduction by Geobacter sulfurreducens biofilms.
Article in Applied and environmental microbiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 88 citations in OpenAlex.
- Cation-driven envelope dynamics modulate outer membrane vesiculation and extracellular electron transfer in Geobacter.Nature communications · 2026Article
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- Influence of support materials on the electroactive behavior, structure and gene expression of wild type and GSU1771-deficient mutant of Geobacter sulfurreducens biofilms.Environmental science and pollution research international · 2025Article
- Article
- Methylmercury formation in biofilms ofFrontiers in microbiology · 2023Article
- Impact of microbial processes on the safety of deep geological repositories for radioactive waste.Frontiers in microbiology · 2023Review
- Molecular Mechanisms Underlying Bacterial Uranium Resistance.Frontiers in microbiology · 2022Review
- Application Progress ofIndian journal of microbiology · 2021Review
- Competitive advantage of oxygen-tolerant bioanodes ofBiofilm · 2021Article
- Genetic analysis of electroactive biofilms.International microbiology : the official journal of the Spanish Society for Microbiology · 2021Article
- Adaptive Synthesis of a Rough Lipopolysaccharide in Geobacter sulfurreducens for Metal Reduction and Detoxification.Applied and environmental microbiology · 2021Article
- Biofilm Biology and Engineering ofFrontiers in bioengineering and biotechnology · 2021Review
- Plant secondary metabolites induced electron flux in microbial fuel cell: investigation from laboratory-to-field scale.Scientific reports · 2020Article
- Biology and biotechnology of microbial pilus nanowires.Journal of industrial microbiology & biotechnology · 2020Review
- Cobalt Resistance via Detoxification and Mineralization in the Iron-Reducing BacteriumFrontiers in microbiology · 2020Article
- Enhanced Growth of Pilin-Deficient Geobacter sulfurreducens Mutants in Carbon Poor and Electron Donor Limiting Conditions.Microbial ecology · 2019Article
- The Effect of Dissimilatory Manganese Reduction on Lactate Fermentation and Microbial Community Assembly.Frontiers in microbiology · 2019Article
- Harnessing the power of microbial nanowires.Microbial biotechnology · 2018Review
- Biogenic non-crystalline UNature communications · 2017Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
Abstract
Biofilms formed by dissimilatory metal reducers are of interest to develop permeable biobarriers for the immobilization of soluble contaminants such as uranium. Here we show that biofilms of the model uranium-reducing bacterium Geobacter sulfurreducens immobilized substantially more U(VI) than planktonic cells and did so for longer periods of time, reductively precipitating it to a mononuclear U(IV) phase involving carbon ligands. The biofilms also tolerated high and otherwise toxic concentrations (up to 5 mM) of uranium, consistent with a respiratory strategy that also protected the cells from uranium toxicity. The enhanced ability of the biofilms to immobilize uranium correlated only partially with the biofilm biomass and thickness and depended greatly on the area of the biofilm exposed to the soluble contaminant. In contrast, uranium reduction depended on the expression of Geobacter conductive pili and, to a lesser extent, on the presence of the c cytochrome OmcZ in the biofilm matrix. The results support a model in which the electroactive biofilm matrix immobilizes and reduces the uranium in the top stratum. This mechanism prevents the permeation and mineralization of uranium in the cell envelope, thereby preserving essential cellular functions and enhancing the catalytic capacity of Geobacter cells to reduce uranium. Hence, the biofilms provide cells with a physically and chemically protected environment for the sustained immobilization and reduction of uranium that is of interest for the development of improved strategies for the in situ bioremediation of environments impacted by uranium contamination.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.