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Bioleaching of soluble phosphorus from rock phosphate containing pyrite with DES-induced Acidithiobacillus ferrooxidans

  • Ru-an Chi (池汝安)Email author
  • Xiao-hui Huang (黄晓慧)
  • Chun-qiao Xiao (肖春桥)
  • Yuan-xin Wu (吴元欣)
  • Wen-xue Zhang (张文学)
Article

Abstract

The effects of Acidithiobacillus ferrooxidans (At. f) mutated with diethyl sulfate (DES) as a mutagen on the bioleaching of soluble phosphorus (P) from rock phosphate (RP) were investigated. The results show that the oxidative activity of At. f is greatly improved by 1.0% (volume fraction) of DES. Correspondingly, the highest leaching rate of soluble P is also obtained to be 14.9% by the At. f mutated, which is 85.8% higher than that of the adapted At. f without mutation. In addition, the SEM images are significantly performed that the corrosion of RP residue surfaces leached by 1.0% DES-induced At.f is much worse than that of leached by the adapted At. f. All the above indicate that the leaching efficiency of soluble P from RP with pyrite can be greatly improved by using DES-induced At. f to a certain extent.

Key words

bioleaching rock phosphate (RP) Acidithiobacillus ferrooxidans (At. fdiethyl sulfate soluble phosphorus mutation 

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Copyright information

© Central South University Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Ru-an Chi (池汝安)
    • 1
    • 2
    Email author
  • Xiao-hui Huang (黄晓慧)
    • 1
    • 2
  • Chun-qiao Xiao (肖春桥)
    • 1
    • 2
  • Yuan-xin Wu (吴元欣)
    • 1
    • 2
  • Wen-xue Zhang (张文学)
    • 3
  1. 1.Key Laboratory for Green Chemical Process of Ministry of EducationWuhan Institute of TechnologyWuhanChina
  2. 2.Hubei Key Laboratory of Novel Reactor and Green Chemical TechnologyWuhan Institute of TechnologyWuhanChina
  3. 3.Yunnan Phosphate Chemical (Group) Co., Ltd.KunmingChina

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