期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 36, 期 23, 页码 4943-4947出版社
AMER CHEMICAL SOC
DOI: 10.1021/es025872a
关键词
-
Particulates emitted from coal-burning power plants typically contain very small amounts of uranium (<10 ppm). Because of the extremely low concentrations, the form of the uranium has been unknown. Using a variety of advanced electron microscopy techniques, we have identified for the first time nanocrystals of uraninite, UO2+x, encapsulated in carbonaceous matter (less than or equal to50 nm) similar to fullerene. We have also identified, for the first time, closely associated fullerenes, C-60. The carbon-caged nanocrystals of uraninite are protected from the immediate oxidation that would lead to increased mobility of uranium in the environment. Still, the presence of uranium in the very fine fraction of atmospheric particulates provides another pathway for radiation exposure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据