Separation of ReO4
−/TcO4
− from simulated radioactive waste liquid by a novel series of anion exchange resins
Author:
Huang Yiwei12, Chen Xinlong1, Shen Yinglin1ORCID, Li Xiaomin1, Zhi Xupeng1, Liu Peng1, Liu Meiying1, Liu Bin13
Affiliation:
1. School of Nuclear Science and Technology , Lanzhou University , Lanzhou 730000 , China 2. Department of Nuclear Medicine , Wuhan University, Zhongnan Hospital , Wuhan 430071 , China 3. School of Stomatology , Lanzhou University , Lanzhou 730000 , China
Abstract
Abstract
Selective removal of 99TcO₄− 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 ReO4
− 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−/ReO₄−, in a wide pH range of pH 5–11 for ReO₄−/TcO₄− adsorption. Among these resins, MAPE-1 has the best adsorption performance for ReO4
−, with a maximum adsorption capacity of 202.4 mg/g and a high distribution ratio K
d
of 6.2 × 10⁶ mL/g at pH 7. The adsorption mechanism involves anion exchange between functionalized ionic liquids and TcO₄−/ReO₄−, 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.
Funder
National Natural Science Foundation of China
Publisher
Walter de Gruyter GmbH
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