2 results about "Acidithiobacillus ferrooxidans" patented technology

This application provides a method for enhanced bioleaching of uranium ore based on sulfur autotrophic denitrification pre-desulfurization, comprising: placing uranium ore in a reactor, inoculating with sulfur autotrophic denitrifying bacteria, and introducing nitrate-containing feed water under anoxic conditions; utilizing the denitrifying bacteria to selectively oxidize and remove the sulfide coating layer on the ore surface by using sulfide-iron compounds in the uranium ore as electron donors and nitrates as electron acceptors, to obtain desulfurized uranium ore; then placing the desulfurized uranium ore in a leaching system and inoculating with *Acidithiobacillus ferrooxidans* for bioleaching to achieve uranium extraction. This invention selectively removes the sulfide coating layer on the uranium ore surface through sulfur autotrophic denitrification pre-desulfurization treatment, fully exposing the uranium minerals and significantly improving bioleaching efficiency. After optimized process treatment, the uranium leaching rate increased from 41.2% in the untreated ore to 66.5%. This method has high selectivity and low operating costs, providing a new technical path for the efficient extraction of low-grade, complex, associated uranium ores.

The application relates to the technical field of electronic material preparation, and particularly discloses a lead-ruthenate preparation method based on acidithiobacillus ferrooxidans mediation. The application takes soluble lead salt and soluble ruthenium salt as raw materials, utilizes the biological metabolic characteristics of acidithiobacillus ferrooxidans, regulates the oxidation-reduction environment and ion adsorption-deposition behavior of the system, realizes the directional synthesis of a lead-ruthenate precursor under mild conditions, and obtains high-purity and high-crystallinity lead-ruthenate powder through subsequent calcination treatment. The method has the advantages of mild reaction conditions, high raw material utilization rate, controllable product purity, green environmental protection and the like, solves the technical problems of high energy consumption of a traditional high-temperature solid-phase method, easy product agglomeration, complex process of a sol-gel method and high cost, and the prepared lead-ruthenate powder has good application prospects in the fields of thick-film resistors, high-temperature electrode materials and the like.