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The following mechanisms of direct bacteria-uranium interactions are described:
i) oxidation of U(IV) to U(VI) resulting in solubilization;
ii) bioaccumulation, which includes processes of bio-sorption by cell surface
iii) reduction of U(VI) to insoluble U(IV); polymers and/or uptake inside the cells.
iv) The U(VI) accumulated both on the bacterial surfaces or inside the cells as well as biologically reduced U(IV) precipitates can initiate bio-mineralization processes, which result in immobilization of additional amounts of uranium.
v) Dose rate: 300 gm per Ton Biomass (for soil treatment).
vi) Dose rate: 100 gm per KL (for water treatment).