铀矿
铀
贫化铀
降水
锕系元素
环境化学
化学
铀矿石
水溶液
环境科学
放射化学
核化学
材料科学
冶金
物理化学
物理
气象学
作者
Yohey Suzuki,Shelly D. Kelly,Kenneth Kemner,Jillian F. Banfield
出处
期刊:Nature
[Springer Nature]
日期:2002-09-01
卷期号:419 (6903): 134-134
被引量:373
摘要
One strategy that is being pursued to tackle the international problem of actinide contamination of soils, sediments and water is to use microbial activity to 'fix' these radionuclides into an insoluble form that cannot be readily dispersed. Here we show that uraninite (UO(2)) particles formed from uranium in sediments by bacterial reduction are typically less than 2 nanometres across and that the small size has important implications for uraninite reactivity and fate. Because these tiny particles may still be transported in an aqueous environment, precipitation of uranium as insoluble uraninite cannot be presumed to immobilize it.
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