| A Novel Approach to Bioleach Soluble Phosphorus from Rock Phosphate |
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| 作者姓名： | 池汝安 肖春桥 黄晓慧 王存文 吴元欣 |
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| 作者单位： | Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology Wuhan Institute of Technology，Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology Wuhan Institute of Technology，Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology Wuhan Institute of Technology，Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology Wuhan Institute of Technology，Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology Wuhan Institute of Technology Wuhan，Hubei 430073，China，Wuhan，Hubei 430073，China，Wuhan，Hubei 430073，China，Wuhan，Hubei 430073，China，Wuhan，Hubei 430073，China |
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| 摘 要： | A novel approach to bioleach soluble phosphorus from rock phosphate, involving the bio-oxidation of pyrite by adaptated Acidithiobacillus ferrooxidans (At. f) and the product of sulfuric acid to dissolve rock phosphate, has been proposed in this paper. The soluble phosphorus could be leached more effectively in the presence of pyrite by At. f than that leached directly by sulfuric acid. The optimal technological parameters are presented. The highest phosphorus leaching rate is 9.00% when the culture substrate is the mixture of FeSO4·7H2O and pyrite, the phosphorus leaching rate is 8.00% when the initial pH and culture time are 2.5 and 5 d, respectively. The optimal rock phosphate particle size is 0.05 mm for the leaching of phosphorus. The bigger the grains of pyrite, the lower the phosphorus leaching rate. The bacterium At. f should be appropriately adaptated, which makes it easier to bioleach soluble phosphorus from rock phosphate.
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| 关 键 词： | bioleach soluble phosphorus rock phosphate pyrite Acidithiobacillus ferrooxidans |
| 文章编号： | 1009-606X(2007)02-0310-07 |
| 修稿时间： | 2006年4月10日 |
A Novel Approach to Bioleach Soluble Phosphorus from Rock Phosphate |
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| CHI Ruan,XIAO Chun-qiao,HUANG Xiao-hui,WANG Cun-wen,WU Yuan-xin.A Novel Approach to Bioleach Soluble Phosphorus from Rock Phosphate[J].Chinese Journal of Process Engineering,2007,7(2):310-316. |
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| Authors: | CHI Ruan XIAO Chun-qiao HUANG Xiao-hui WANG Cun-wen WU Yuan-xin |
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| Affiliation: | Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology,Wuhan Institute of Technology, Wuhan, Hubei 430073, China |
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| Abstract: | A novel approach to bioleach soluble phosphorus from rock phosphate, involving the bio-oxidation of pyrite by adaptated Acidithiobacillus ferrooxidans (At. f) and the product of sulfuric acid to dissolve rock phosphate, has been proposed in this paper. The soluble phosphorus could be leached more effectively in the presence of pyrite by At. f than that leached directly by sulfuric acid. The optimal technological parameters are presented. The highest phosphorus leaching rate is 9.00% when the culture substrate is the mixture of FeSO4·7H2O and pyrite, the phosphorus leaching rate is 8.00% when the initial pH and culture time are 2.5 and 5 d, respectively. The optimal rock phosphate particle size is 0.05 mm for the leaching of phosphorus. The bigger the grains of pyrite, the lower the phosphorus leaching rate. The bacterium At. f should be appropriately adaptated, which makes it easier to bioleach soluble phosphorus from rock phosphate. |
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| Keywords: | bioleaching soluble phosphorus rock phosphate pyrite Acidithiobacillus ferrooxidans (At f) |
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