Saba miri - Department of Biotechnology, Faculty of Life Science, Alzahra University, Tehran,Iran.
Ezat Asgarani - Department of Biotechnology, Faculty of Life Science, Alzahra University, Tehran,Iran.
Faezeh Fatemi - Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran,
Samaneh Jahani - Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran,

The aim of this study was to determine the effect of low-grade ore pulp density on dissolution of metal by Acidithiobacillus ferrooxidans (A. ferrooxidans). The bioleaching experiments was carried with 9k medium and different pulp densities (2.5,15%) of anomaly II of Saghand in Yazd at 150rpm and 35oC. The results demonstrated that the variations of Eh, pH, ferrous iron and metal extraction in the bioleaching system of the bacteria cultivated with 15% (w/v) pulp density lag behind that bacteria with 2.5% (w/v) pulp density. Study on the bioleaching with A. ferrooxidans has indicated that high concentration of metal can decrease leaching capacity.

Acidithiobacillus ferrooxidans, Bioleaching, Anomaly II, Metal ions, Pulp density