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Remediation of potentially acidified Hanford wastes using tri-n-octyl phosphine oxide extraction chromatographic materials
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2018-03-15 , DOI: 10.1016/j.seppur.2018.03.029
Jenifer C. Shafer , Jana Sulakova , Mark D. Ogden , Kenneth L. Nash

As the Hanford site undergoes remediation, significant economies could be realized if aluminum and chromium are kept from High Level Waste glass produced at the Hanford Waste Treatment Plant (WTP). An acidic scrub of the Hanford sludge could enhance Al removal, although such treatment could lead to the mobilization of transuranic elements. If mobilization were minor, a chromatographic secondary cleanup of the acidic waste stream may be preferred to allow preconcentration of radionuclides prior to processing through the Hanford WTP. This study examines tri-n-octyl phosphine oxide coated resins as a chromatographic means for the removal of transuranics from a secondary waste stream. Metal uptake kinetics and mechanisms for transuranics and a simulant transuranic (europium) with the developed resin are characterized in both batch and column operation modes. Results indicate up to 99% of the radioactive material present from an acidic sludge leach may be recovered using extraction chromatography providing an effective avenue for high aluminum content tank pre-treatment.



中文翻译:

使用三正辛基氧化膦萃取色谱材料修复潜在酸化的汉福德废料

随着汉福德厂址的整治,如果汉福德废品处理厂(WTP)生产的高废玻璃中保留铝和铬,则可以实现显着的经济效益。汉福德(Hanford)污泥的酸性洗涤可以增强Al的去除,尽管这种处理可以导致超铀元素的动员。如果迁移率不高,则最好对酸性废物流进行二次色谱纯化,以便在通过Hanford WTP进行处理之前对放射性核素进行预浓缩。这项研究检查了三正辛基氧化膦涂覆的树脂,作为从二级废物流中去除超铀酸的色谱方法。在分批和色谱柱操作模式下,都对超铀酸金属和模拟的超铀酸金属(铀)的金属吸收动力学和机理进行了表征。结果表明,可以使用萃取色谱法回收酸性污泥浸出物中高达99%的放射性物质,从而为高铝含量罐的预处理提供了有效途径。

更新日期:2018-03-15
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