A method of rapid oxidating Fe2+ from uranium leachate at low temperature in-situ leaching system by psychrophilic acidophilic bacteria

• Main Authors: Li, Peng, Li, Qian, Hu, Eming, Chen, Peng, Yang, Yihan, Li, De, Yu, Changgui, Wang, Qingliang, Xu, Yiqun, Wang, Hongqiang
• Format: Patent
• Language: English
• Published: 19.11.2020
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

In the method for in-situ leach and extracting Fe2 in uranium solution by low-temperature and rapid oxidation method of cold-resistant acidophilic bacteria, adopting the cryophilic acidophilus as an oxidizing agent, and biological ceramsite with strong acid resistance and adopting large specific surface area as a carrier of biofilm formation of the bacteria.Adopting a moving bed bioreactor to immobilize the bacteria for rapid and continuous oxidation and adsorption of Fe ~ (2 +) in the tailings. The specific operation steps include as below: Activating the psychrophilic acidophilus solution-carrier pretreatment-coating-fast continuous oxidation adsorption of Fe2 -ceramsite carrier in the tail solution. The selected psychrophilic acidophilus strain can keep the oxidizing activity of bacteria and oxidize ferrous ion rapidly under the low temperature of 5 ~ 20 °C. -1/2 -5 t 5-4 Figure 1