Automated Radiochemical Separation, Analysis, and Sensing

Grate, Jay W.; O’Hara, Matthew J.; Egorov, Oleg B.

doi:10.1016/b978-0-12-384873-4.00018-9

Cited by 3 publications

(1 citation statement)

References 287 publications

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“…Conventional methods for 210 Pb radiochemical separation include solvent extraction, solid phase extraction, precipitation, or ion exchange chromatography, which are usually applied in combined fashion. However, these separation methods require long time processing (Grate et al 2020 ). Over the past decades, highly selective extraction chromatographic materials, such as Sr resin and PS rein (Gimenez et al 2023 ; Mingote and Nogueira 2016 ), have been developed to simplify 210 Pb separation, and new methods involving a degree of automated separation have also been explored.…”

Section: Separation and Purificationmentioning

confidence: 99%

Recent progresses in analytical method development for 210Pb in environmental and biological samples

Ren,

Gong,

Zhou

et al. 2024

Environ Sci Pollut Res

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As a decay product of uranium series, 210Pb spreads widely in the nature and imposes strong radiological and chemical toxicity. It is vital to establish reliable and efficient radioanalytical methods for 210Pb determination to support environment and food radioactivity monitoring programs. This article critically reviews analytical methods developed for determining 210Pb in environmental and biological samples, especially new development in recent years. Techniques applied throughout different analytical steps including sample pretreatment, separation, purification, and detection are summarized and their pros and cons are discussed to provide a holistic overview for 210Pb environmental and biological assay.

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Section: Separation and Purificationmentioning

confidence: 99%

Recent progresses in analytical method development for 210Pb in environmental and biological samples

Ren,

Gong,

Zhou

et al. 2024

Environ Sci Pollut Res

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<sup>99</sup>Tc Process Monitoring System In-Lab Performance Characterization

O’Hara

Niver

2014

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Science to Support DOE Site Cleanup: The Pacific Northwest National Laboratory Environmental Management Science Program Awards -- Fiscal Year 2002 Mid-Year Progress Report

Bredt¹,

Ainsworth²,

Brockman³

et al. 2002

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Over three-hundred underground storage tanks containing about 350,000 cubic meters (92 million gallons) of mixed chemical and radioactive waste are located at the Hanford Site (Washington), Oak Ridge Reservation (Tennessee), Savannah River Site (South Carolina), Idaho National Engineering and Environmental Laboratory (Idaho), and West Valley Site (New York). The liquids, sludges; saltcake, and calcined solids (at Idaho) in these tanks contain about 70% (720 million curies) of the man-made radioactivity existing in the DOE complex. Remediation of this tank waste is one of the most technically complex, scientifically challenging, and potentially expensive problems facing DOE.Hanford contains 60% of the waste volume and 30% of the radioactivity for all DOE highlevel waste tanks. At Hanford there are 177 underground storage tanks containing 210,000 cubic meters (55 million gallons) ofhigh-level waste. The current baseline approach to remediating this tank waste involves retrieving the waste followed by a solid-liquid separation. The liquid, low-activity stream will have cesium (Cs) and other radionuclides removed and then be immobilized as low-level radioactive and chemical waste. The solid, high-activity stream will be pretreated to reduce its volume (mainly through the removal of non-radioactive inorganic components such as chromium, phorphous, and aluminum) and then immobilized as high-level radioactive waste.The presence of sub-micron, colloidal particles in the waste complicates nearly every aspect of waste processing. They make the separation of solid and liquid waste streams difficult by forming colloidal suspensions, which may take months to settle, if at all. These suspensions can also form sediments or gels, clogging pipes and interrupting waste transfer operations.lll Colloidal particles can also contaminate the liquid waste, complicating downstream processing. Radionuclides can adsorb to the particles' surface and radioactively contaminate the low-level liquid waste stream, forcing it to be treated as high-activity waste, thereby increasing treatment costs. In other cases, the presence of colloidal particles interferes with separations processes; for example, plugging ion exchange columns causing schedule delays and increased costs.The EMSP project Colloidal Agglomerates in Tank Sludge: Impact on Waste Processing (Page 1) is conducting experiments to understand and identify the chemical conditions which control the formation and agglomeration of colloidal particles. In this way, the impact that agglomerate structures have on the rheology and sedimentation properties of the waste can be quantified, and methods for manipulating agglomerate structures to optimize tank waste transfer and processing conditions can be developed. It is important to note that the new knowledge and data generated by this project will also be of benefit to the cleanup ofN-Basin liquids at Hanford, and of the tank wastes at the Oak Ridge Reservation and the Savannah River Site.The removal of radionuclides to prepare the liquid wast...

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Automated Radiochemical Separation, Analysis, and Sensing

Cited by 3 publications

References 287 publications

Recent progresses in analytical method development for 210Pb in environmental and biological samples

Recent progresses in analytical method development for 210Pb in environmental and biological samples

<sup>99</sup>Tc Process Monitoring System In-Lab Performance Characterization

Science to Support DOE Site Cleanup: The Pacific Northwest National Laboratory Environmental Management Science Program Awards -- Fiscal Year 2002 Mid-Year Progress Report

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