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Separation of ReO4−/TcO4− from simulated radioactive waste liquid by a novel series of anion exchange resins.
- Source :
- Radiochimica Acta; May2024, Vol. 112 Issue 5, p315-325, 11p
- Publication Year :
- 2024
-
Abstract
- Selective removal of <superscript>99</superscript>TcO₄<superscript>−</superscript> from radioactive wastewater is a challenging but significant task, which benefits spent fuel reprocessing and radioactive-waste leakage treatment. This work introduces the performance of adsorption ReO<subscript>4</subscript><superscript>−</superscript> using a series of novel anion exchange resins, namely MAPE-1, MAPE-2, MAPE-3, and MAGD-1, impregnated with functionalized ionic liquids as active sites. They exhibit a high selectivity towards TcO₄<superscript>−</superscript>/ReO₄<superscript>−</superscript>, in a wide pH range of pH 5–11 for ReO₄<superscript>−</superscript>/TcO₄<superscript>−</superscript> adsorption. Among these resins, MAPE-1 has the best adsorption performance for ReO<subscript>4</subscript><superscript>−</superscript>, with a maximum adsorption capacity of 202.4 mg/g and a high distribution ratio K<subscript>d</subscript> of 6.2 × 10⁶ mL/g at pH 7. The adsorption mechanism involves anion exchange between functionalized ionic liquids and TcO₄<superscript>−</superscript>/ReO₄<superscript>−</superscript>, which is supported by X-ray energy dispersive spectroscopy (EDS) and Fourier Transform Infrared spectroscopy (FT-IR) analyses. In addition, X-ray photoelectron spectroscopy (XPS) further illustrates the interaction between the resin and perrhenate. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00338230
- Volume :
- 112
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Radiochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 177041720
- Full Text :
- https://doi.org/10.1515/ract-2023-0261