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Contaminant Uranium Phases rand Leaching at the Fernald Site in Ohio

机译:俄亥俄州费纳尔德遗址的铀污染阶段和浸出

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摘要

Electron beam techniques were used to characterize uranium-contaminated soils at the Fernald site in Ohio. Uranium particulates had been deposited on the soil through chemical spills and from the operation of an incinerator plant on the site. The major uranium phases were identified using analytical electron microscopy (AEM) combined with electron diffraction as uranyl phosphate (meta-autunite), uranium oxide (uraninite), and uranium metaphosphate [U(PO_3)_4]. The U(PO_3)_4 was found predominantly at an incinerator site at Fernald. Carbonate leaching in an oxygen environment has removed some of the U(IV) phases; however, U(PO_3)_4 has not been removed by any of the chemical remediation technologies tried to date. These observations suggest that an additional physical extraction procedure is needed to remove this phase. Some evidence suggests that the uranium has undergone weathering, resulting in its redistribution within the soil.
机译:电子束技术用于表征俄亥俄州Fernald场址的铀污染土壤。铀微粒是通过化学溢出和现场焚烧厂的运行而沉积在土壤中的。使用分析电子显微镜(AEM)结合电子衍射确定了铀的主要相,分别为磷酸铀酰(金属-金铁矿),氧化铀(铀红石)和偏磷酸铀[U(PO_3)_4]。 U(PO_3)_4主要在Fernald的焚化炉现场发现。氧气环境中的碳酸盐浸出已去除了一些U(IV)相。但是,迄今为止,尚未通过任何化学修复技术去除U(PO_3)_4。这些观察结果表明,需要额外的物理萃取程序来去除该相。一些证据表明,铀经历了风化作用,导致其在土壤中的重新分布。

著录项

  • 来源
    《Environmental Science & Technology》 |1996年第1期|p.81-88|共8页
  • 作者单位

    Chemical Technology Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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