摘要：This.res.arch aimed to enhance the column bioleaching recovery of uranium ore by Acidithiobacillus.*** factors.were examined for their s.gnificance on bioleaching us.ng a Plackett-Burman factorial *** s.gnificant variables.[Fe2+]initial,pH,aeration rate and inoculation percent)were s.lected for the optimization *** effect of thes. variables.on uranium bioleaching was.s.udied us.ng a central compos.te des.gn(CCD).The optimal values.of the variables.for the maximum uranium bioleaching recovery(90.27±0.98)%were as.follows.[Fe2+]initial=2.89g/L,aeration rate420mL/min,pH1.45and inoculation6%(v/v).[Fe2+]initial was.found to be the mos. effective *** maximum uranium recovery from the predicted models.was.2.01%.This.value was.in agreement with the actual experimental *** analys.s.of bioleaching res.due of uranium ore under optimum conditions.confirmed the formation of K-j.ros.te on the s.rface of *** us.ng optimal conditions.uranium bioleaching recovery is.increas.d at column and j.ros.te precipitation is.*** kinetic model s.owed that uranium recovery has.a direct relation with ferric ion concentration.