Experimental study on removal of organic matters from alkaline uranium leaching solution with ultrafiltration

Organic matters in alkaline uranium leaching solution during CO₂+O₂ in-situ leaching process will make ion-exchange resins polluted and resin beds hardened, which will decrease the treatment efficiency and influence the followed procedure negatively.Ultrafiltration is chosen to deal with the organic matters in leaching liquor in a uranium mine in Inner Mongolia after investigation.Experimental study is carried out to remove the organic matters from leaching solution with an ultrafiltration device and the test results are compared with the original process.The organic matters can be removed efficiently with ultrafiltration by reducing the COD and TOC value of the solution, resin pollution and bed hardening can be weakened.After 5 times of adsorption-elution process, no hardening occurs in the resin bed and flowrate keeps stable, which means resin adsorption keeping stable and continuous.Further study on operation conditions and life time of the device is required.