Utilization of phosphate rock as a sole source of phosphorus for uranium biomineralization mediated by Penicillium funiculosum |
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| Authors: | Nan Hu Ke Li Yang Sui Dexin Ding Zhongran Dai Dianxin Li Nieying Wang Hui Zhang |
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| Affiliation: | Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001 China ; Hunan Taohuajiang Nuclear Power Co., Ltd, Yiyang China 413000 ; Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources, Hengyang 421001 China, |
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| Abstract: | In this work, uranium(vi) biomineralization by soluble ortho-phosphate from decomposition of the phosphate rock powder, a cheap and readily available material, was studied in detail. Penicillium funiculosum was effective in solubilizing P from the phosphate rock powder, and the highest concentration of the dissolved phosphate reached 220 mg L−1 (pH = 6). A yellow precipitate was immediately formed when solutions with different concentrations of uranium were treated with PO43−-containing fermentation broth, and the precipitate was identified as chernikovite by Fourier transform infrared spectroscopy, scanning electron microscope, and X-ray powder diffraction. Our study showed that the concentrations of uranium in solutions can be decreased to the level lower than maximum contaminant limit for water (50 μg L−1) by the Environmental Protection Agency of China when Penicillium funiculosum was incubated for 22 days in the broth containing 5 g L−1 phosphate rock powder.In this work, uranium(vi) biomineralization by soluble ortho-phosphate from decomposition of the phosphate rock powder, a cheap and readily available material, was studied in detail. |
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