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首页> 外文期刊>Radioactive Waste Management and Environmental Restoration >BACTERIAL REDUCTION OF SOLUBLE URANIUM: THE FIRST STEP OF IN SITU IMMOBILIZATION OF URANIUM
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BACTERIAL REDUCTION OF SOLUBLE URANIUM: THE FIRST STEP OF IN SITU IMMOBILIZATION OF URANIUM

机译：可溶性铀的细菌还原：铀原位固定化的第一步

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摘要

The mobility of uranium in groundwater is a problem of considerable magnitude. One approach would be to control the distribution of uranium by converting the water-soluble uranium ion to one that is less soluble. This study focuses on the use of Desulfovibrio gigas, D. baculatus, D. vulgaris, D. desulfuricans, Pseudomonas putida, a denitrifying Pseudomonas strain and mixed cultures from sludge or uranium mill tailing sites for the bioconversion of uranyl, U(Ⅵ), to uraninite, U(Ⅳ). In general, 82% to 92% of U(Ⅵ) was reduced in pure cultures, while 45% to 99% of added uranium was transformed by diverse bacteria present in groundwater. The oxyanions of selenium and vanadium had little effect on the uranium reduction by bacteria, while arsenic and molybdenum at 1.0 mM inhibited reduction of uranium. The product of uranium metabolism was U collected in needle-like crystals. A model is proposed for in situ bioremediation of uranium in groundwater at uranium mill tailing sites.
机译：铀在地下水中的迁移率是一个相当大的问题。一种方法是通过将水溶性铀离子转化为难溶的铀离子来控制铀的分布。这项研究的重点是将脱硫弧菌，D。baculatus，D。寻常杆菌，D。desulfuricans，恶臭假单胞菌，反硝化的假单胞菌菌株以及污泥或铀厂尾矿位的混合培养物用于铀酰，U（Ⅵ）的生物转化。到尿素，U（Ⅳ）。通常，纯培养物中的U（Ⅵ）减少了82％至92％，而地下水中存在的多种细菌转化了铀的45％至99％。硒和钒的氧阴离子对细菌减少铀的影响很小，而1.0 mM的砷和钼则抑制了铀的减少。铀代谢产物以针状晶体形式收集。提出了在铀厂尾矿现场对地下水中铀进行原位生物修复的模型。

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