Microbial Recovery of Uranium from Low Grade Ore Deposit of 5th Anomaly of Saghand

Microbial leaching of uranium from Saghand low grade ore deposit by the acidiophilic mesophile acidithiobacillus ferrooxidants was investigated by changing the parameters such as pulp density, ferrous ions concentration as the resource of energy, initial pH of leaching solution and shaking speeds. The findings indicated that this strain is suitable for uranium recovery from the mentioned ore. About 60% of uranium could be recoverd in 50 hours by a pulp density of 2.5%(W/V). In the absence of microbial activity only about 5% of uranium was recoverd, and by the sulfuric acid leaching, only about 8.5% of uranium was extracted.