Column bioleaching of sandstone type uranium ore deposit

  • ZHOU YI PENG EAST CHINA UNIVERSITY OF TECHNOLOGY NANCHANG
  • HAZRAT BILAL EAST CHINA UNIVERSITY OF TECHNOLOGY NANCHANG
  • GAO BAI EAST CHINA UNIVERSITY OF TECHNOLOGY NANCHANG
Keywords: Column leaching, bioleaching, uranium, Thiobacillus ferroxidan

Abstract

Column bioleaching has been performed on sandstone type uranium ore. The column is initially leached with H2SO4 to make the environment acidic and feasible for thiobacillus ferroxidan bacteria growth. The column later injected with acid solution containing 6g/L H2SO4, iron source 1.5g/L (Fe3+ 0.75g/L, Fe2+ 0.75g/L) and bacteria. The leaching results show that the uranium concentration increases rapidly to maximum value 445mg/L and later decreases and reduced to minimum value. Fe3+ and Fe2+ curves shows that initially Fe2+ concentration rises indicating uranium oxidation. Later raise of Fe3+ concentration shows that bacteria growing within column causing oxidation of Fe2+ ions. Flow rate decreases from 6.35ml/hr to 5.37ml/hr at the start of test but later enhance to 8.50ml/hr. Recovery curve shows that total uranium recovered in this test is 83%. Maximum recovery attained within 90 hours which later changes slightly.

 

Published
2019-05-18
How to Cite
YI PENG, Z., BILAL, H., & BAI, G. (2019). Column bioleaching of sandstone type uranium ore deposit. Pacific International Journal , 2(2), 69-75. Retrieved from http://pacificinternationaljournal.com/index.php/pij/article/view/57
Section
Articles