Journal of Radiation Research and Radiation Proces ›› 2016, Vol. 34 ›› Issue (5): 50401-050401.doi: 10.11889/j.1000-3436.2016.rrj.34.050401

• RADIATION TECHNOLOGY APPLICATION • Previous Articles     Next Articles

Study on breeding Acidithiobacillus ferrooxidans induced by X-ray irradiation and bioleaching of refractory gold ore

YAN Qian1,2 ZHANG Miaomiao1 GUO Xiaopeng1,2 LI Wenjian1 LU Dong1   

  1. 1(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2016-05-09 Revised:2016-06-22 Online:2016-10-20 Published:2016-10-14
  • Contact: Ph.D. LI Wenjian, professor
  • About author:YAN Qian (female) was born in December 1992 and graduated from Northwest Normal University in June 2014. Now she is a master candidate in Institute of Modern Physics, Chinese Academy of Sciences, majoring in biophysics and focusing on basic study on microbial mutation breeding. E-mail: qiany@impcas.ac.cn
  • Supported by:
    Western Talent Training Program of the Chinese Academy of Sciences, China(No. Y306010XB0)

Abstract: To study the influence of Acidithiobacillus ferrooxidans (At.f) mutated by X-ray on the biooxidation and bioleaching of refractory gold ores, X-ray was used to irradiate At.f strains at different doses, and more efficient strains were screened by microbiology methods and the measurement of relevant indicators. Compared with the original strain, the bioleaching ratio of iron by the mutants after irradiation at 450 Gy was 50.24%, namely 44% increased, and the bioleaching ratio of gold reached 86.68%-two folds than gold direct cyanidation leaching. It is proved that X-ray irradiation is an outstanding way to breed mutants of high bioleaching ratio of iron and gold strains of At.f.

Key words: Acidithiobacillus ferrooxidans, X-ray irradiation, Biooxidation, Refractory gold ores

CLC Number: 

  • Q691.5,TL99