Bioleaching of soluble phosphorus from rock phosphate containing pyrite with DES-induced Acidithiobacillus ferrooxidans |
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| Authors: | Ru-an Chi Xiao-hui Huang Chun-qiao Xiao Yuan-xin Wu and Wen-xue Zhang |
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| Affiliation: | 1. Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China;2. Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430073, China; 3. Yunnan Phosphate Chemical (Group) Co., Ltd., Kunming 650600, China) |
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| 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. |
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| Keywords: | bioleaehing rock phosphate (RP) Acidithiobacillusferrooxidans (At f) diethyl sulfate soluble phosphorus mutation |
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