Biodegradation of tributyl phosphate by naturally occurring microbial isolates and coupling to the removal of uranium from aqueous solution

Article Abstract:

The biodegradation of tributyl phosphate (TBP) by new microbial isolates is coupled to the removal of uranium from aqueous solution in a flow-through system. The proposed products of the degradation are expected to be useful, with the liberated 1-butanol as a biomass growth substrate and the co-released inorganic phosphate moiety as a ligand that can precipitate with heavy metals to retain these as biominerals on the biomass. The approach can be a method for the treatment of TBP-loaded wastes and can be useful for waste phosphotriesters as additives to wastes from metallurgical industries.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Waste Treatment Chemicals ex Biocides, Methods, Biodegradation, Biomass chemicals, Sewage disposal, Waste treatment chemicals

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Extraction of uranium and molybdenum from aqueous solutions: a survey of industrial materials for use in chemical barriers for uranium mill tailings remediation

Article Abstract:

Research was done at the US Department of Energy's Environmental Sciences Laboratory on methods for extracting uranium and molybdenum from contaminated pore fluids. The research was intended to determine materials that could be used in a chemical barrier under receptacles for uranium mill tailings. Several industrial materials were evaluated for their ability to extract uranium and molybdenum both by precipitation and sorption.

Environmental aspects, Uranium industry, Tailings (Metallurgy)

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Biotransformation of binary and ternary citric acid complexes of iron and uranium

Article Abstract:

The use of citric acid to extract toxic metals and radionuclides may result in the development of mixed-metal complexes that are not easily biodegradable. A study of the ternary mixed metal Fe-U-citric acid complex found that Pseudomonas fluorescens had difficulty in the biotransformation of the complex. The binary Fe-citric acid complex was much more readily degraded.

Soil disinfection, Citric acid, Complex compounds, Coordination compounds

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