南华大学学报（自然科学版）2023，Vol.37Issue(5)：9-14,6.DOI:10.19431/j.cnki.1673-0062.2023.05.002
含磷化合物生物矿化铀的形态转化与机理
Morphological Transformation and Mechanism of Phosphorus-containing Compounds Biomineralized Uranium
摘要
Abstract
As an essential element for the survival and growth of microorganisms,phos-phorus can effectively combine with uranium to mineralize into stable U-P precipitates or corresponding minerals.A mixed bacterial-mediated method was applied to address urani-um-contaminated groundwater-sediments with the addition of phosphorus-containing com-pounds to investigate the morphological variations and the stability of uranium products un-der the interaction of phosphorus and indigenous bacteria.The results showed that the ad-dition of phosphorus-containing compounds resulted in 99.84%removal of uranium from the solution.The Modified Community Bureau of Reference revealed that the proportion of uranium in the sediment in the stable state after phosphorus action was about 75%.Ac-cording to the results of the X-ray Photoelectron Spectroscopy and The Modified Community Bureau of Reference,bacteria can effectively mediate U-P precipitation and phosphate can complex with hexavalent uranium to form stable precipitates.Combined with the X-Ray Diffraction,it showed that phosphorus and uranium undergo biomineralization under the action of bacteria can generate Ca-U-P precipitates to realize the conversion and immobilization of uranium from metastable phase to stable phase.关键词
含磷化合物/铀形态/土著细菌/生物修复Key words
phosphorus-containing compounds/uranium species/indigenous bacteria/biore-mediation分类
资源环境引用本文复制引用
寸金芝,彭雷,庞超,吴寒,刘迎云,谭文发..含磷化合物生物矿化铀的形态转化与机理[J].南华大学学报（自然科学版）,2023,37(5):9-14,6.基金项目
国家自然科学基金项目(12075113) （12075113）
湖南省教育厅科学研究重点项目(20A428) （20A428）
