Bacteria team locks toxic uranium into harmless crystals in water
Li J, Ma J, He G, Zhang Q, Qin H
Phytoremediation
The soil microbes working quietly under your compost pile and garden beds are the same class of organisms scientists are now training to pull radioactive metals out of contaminated groundwater, a reminder that the dirt ecosystem does more heavy lifting than most gardeners realize.
Researchers found a group of bacteria, mostly one type called Enterobacter, that thrives in places contaminated with uranium and can grab onto the toxic metal and lock it into solid mineral crystals. When they tuned the water's acidity, temperature, and bacteria concentration just right, the microbes removed almost all the uranium from a test sample. This kind of microbial cleanup could offer a low-cost, low-energy way to treat polluted water near mining or nuclear sites.
Key Findings
The Enterobacter-dominated consortium (97.52% Enterobacter) removed 98.51% of uranium from a 10 mg/L solution under optimized conditions (6% inoculum, pH 6.00, 30°C)
The consortium tolerated uranium concentrations up to 50 mg/L (maximum tolerance concentration) with a minimum inhibitory concentration of 5 mg/L
Uranium removal occurred via biosorption on cell surface groups (carboxyl, phosphoryl, amino) and biomineralization into stable phosphate minerals like Na((UO2)(PO4))·3H2O
chevron_right Technical Summary
Scientists bred a bacteria community dominated by a tough soil microbe that soaks up over 98% of uranium from contaminated water by turning it into stable mineral crystals, offering a cheaper way to clean up nuclear waste sites.
Abstract Preview
Original paper
Targeted domestication of Enterobacter-dominated consortia for enhanced uranium immobilization via phosphate-mediated biomineralization.
Indigenous microbiota adapted to uranium-contaminated environments often exhibit strong uranium resistance and environmental adaptability, making them promising candidates for bioremediation. In th...
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