Decontamination of spent ion exchange resins contaminated with iron-oxide deposits using mineral acid solutions

The efficiency of decontamination of model spent ion exchange resins, contaminated with magnetite and hematite, with mineral acid solutions, and using electro-decontamination, was evaluated. It has been shown that effective hematite dissolution occurs in concentrated mineral acid solutions. However,...

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Bibliographic Details
Published in:Nuclear engineering and technology 2021, 53(9), , pp.2918-2925
Main Authors: Tokar, E.A., Matskevich, A.I., Palamarchuk, M.S., Parotkina, Yu.A., Egorin, A.M.
Format: Article
Language:English
Subjects:
Decontamination
Ion exchange resins
Radioactive waste
Radionuclides
원자력공학
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Summary:The efficiency of decontamination of model spent ion exchange resins, contaminated with magnetite and hematite, with mineral acid solutions, and using electro-decontamination, was evaluated. It has been shown that effective hematite dissolution occurs in concentrated mineral acid solutions. However, the use of direct current increases the decontamination efficiency of spent ion exchange resins contaminated with hematite. It is determined that with increasing voltage and acid concentration, the dissolution efficiency of hematite deposits increases and can exceed 99%. It has been shown that hematite dissolution is accompanied by secondary adsorption of radionuclides due to ion exchange, which can be removed with sodium nitrate solutions.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2021.03.022