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首页> 外文期刊>Environmental Science & Technology >Separating and Stabilizing Phosphate from High-Level Radioactive Waste: Process Development and Spectroscopic Monitoring
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Separating and Stabilizing Phosphate from High-Level Radioactive Waste: Process Development and Spectroscopic Monitoring

机译：从高放废物中分离和稳定磷酸盐：工艺开发和光谱监测

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摘要

Removing phosphate from alkaline high-level waste sludges at thernDepartment of Energy's Hanford Site in Washington State is necessary to increase thernwaste loading in the borosilicate glass waste form that will be used to immobilize the highlyrnradioactive fraction of these wastes. We are developing a process which first leachesrnphosphate from the high-level waste solids with aqueous sodium hydroxide, and thenrnisolates the phosphate by precipitation with calcium oxide. Tests with actual tank wasternconfirmed that this process is an effective method of phosphate removal from the sludgernand offers an additional option for managing the phosphorus in the Hanford tank wasternsolids. The presence of vibrationally active species, such as nitrate and phosphate ions, inrnthe tank waste processing streams makes the phosphate removal process an ideal candidaternfor monitoring by Raman or infrared spectroscopic means. As a proof-of-principlerndemonstration, Raman and Fourier transform infrared (FTIR) spectra were acquired for allrnphases during a test of the process with actual tank waste. Quantitative determination ofrnphosphate, nitrate, and sulfate in the liquid phases was achieved by Raman spectroscopy, demonstrating the applicability ofrnRaman spectroscopy for the monitoring of these species in the tank waste process streams.
机译：在华盛顿州能源部汉福德基地的部门中，从碱性高放废物污泥中去除磷酸盐对于增加硼硅酸盐玻璃废物形式中的废物装载量很有必要，该废物将用于固定这些废物的高放射性部分。我们正在开发一种方法，该方法首先用氢氧化钠水溶液从高含量的废料中浸出磷酸盐，然后通过用氧化钙沉淀来分离磷酸盐。经过实际槽罐测试的结果证实，该方法是从污泥中去除磷酸盐的有效方法，并为管理汉福德槽罐固体中的磷提供了另一种选择。罐废物处理流中存在振动活性物质（例如硝酸根和磷酸根离子），使得磷酸盐去除过程成为通过拉曼光谱仪或红外光谱仪进行监测的理想选择。作为原理证明，在实际罐体废物测试过程中，为所有相获取了拉曼光谱和傅立叶变换红外（FTIR）光谱。通过拉曼光谱法可以定量测定液相中的磷酸根，硝酸根和硫酸根，这证明了拉曼光谱法可用于监测罐式废物处理流中的这些物质。

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  • 来源
    《Environmental Science & Technology》 |2012年第11期|p.6190-6197|共8页
  • 作者

    Gregg J.Lumetta; Jenifer C.Braley; James M.Peterson; Samuel A.Bryan; Tatiana G.Levitskaia;

  • 作者单位

    Pacific Northwest National Laboratory, P.O.Box 999, MSIN P7-25, Richland, Washington 99352, United States;

    Pacific Northwest National Laboratory, P.O.Box 999, MSIN P7-25, Richland, Washington 99352, United States;

    Pacific Northwest National Laboratory, P.O.Box 999, MSIN P7-25, Richland, Washington 99352, United States;

    Pacific Northwest National Laboratory, P.O.Box 999, MSIN P7-25, Richland, Washington 99352, United States;

    Pacific Northwest National Laboratory, P.O.Box 999, MSIN P7-25, Richland, Washington 99352, United States;

  • 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);
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