Utilization of phosphate rock as a sole source of phosphorus for uranium biomineralization mediated by Penicillium funiculosum. Issue 24 (10th April 2018)

• Record Type: Journal Article
• Authors: Hu, Nan; Li, Ke; Sui, Yang; Ding, Dexin; Dai, Zhongran; Li, Dianxin; Wang, Nieying; Zhang, Hui
• Is Part Of: RSC advances. Volume 8:Issue 24(2018)
• Page Start: 13459
• Page End: 13465
• Publication Date: 2018-04-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra01344f
• Languages: English
• ISSNs: 2046-2069

Abstract

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. 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 PO4 3− -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.