Ion exchange resins are widely applied in radioactive liquid waste disposal. However, problems such as the volatilization of radionuclides, acid gas generation, and self-radiolysis by spent cation exchange resins (CERs) demand the development of appropriate treatment methods. Thus, in the present study, the oxidation behaviors were determined for CERs and Sr doped CERs with Li₂CO₃–Na₂CO₃–K₂CO₃ by thermogravimetric analysis. Ternary alkaline molten carbonate with a low melting point was applied for the first time to treat the Sr doped CERs. This method can reduce the energy consumed disposing of CERs and neutralize the tail gases produced by the oxidation of CERs. The oxidation products were analyzed by on-site gas mass spectrometry, infrared spectroscopy, X-ray diffraction, Fourier transform infrared spectrometry, and scanning electron microscopy. After the sulfonic acid group (-SO₃H) decomposed at 300 °C, Sr species did not accelerate the oxidation of residues initially. However, they inhibited the removal of sulfur from the oxidizing residue. The carbonate salt melted at 400 °C and the molten salt effectively alleviated the volatilization of Sr and SO₂, which were trapped as SrCO₃ and sulfate in the molten salt. Moreover, the presence of Sr²⁺ significantly enhanced the removal of sulfur from residues to 69.27% from 54.77%, and effectively increased the destruction and removal efficiency of CERs from 47.31% to 60.35% at 450 °C. These findings demonstrate that molten carbonate salt could be a suitable medium for improving the catalytic performance of Sr.

离子交换树脂广泛应用于放射性废液处理。然而，放射性核素的挥发、酸性气体的产生和废阳离子交换树脂（CERs）的自辐解等问题需要开发合适的处理方法。因此，在本研究中，确定了 CER 和掺有 Li ₂ CO ₃ –Na ₂ CO ₃ –K ₂ CO _{3的 Sr 的 CER 的氧化行为}通过热重分析。首次采用低熔点三元碱性熔融碳酸盐处理Sr掺杂CERs。该方法可以降低处理CERs的能耗，中和CERs氧化产生的尾气。通过现场气相质谱、红外光谱、X射线衍射、傅立叶变换红外光谱和扫描电子显微镜对氧化产物进行了分析。磺酸基团(-SO ₃ H)在300℃分解后，Sr物种最初并没有加速残基的氧化。然而，它们抑制了氧化残渣中硫的去除。400℃熔化的碳酸盐，熔盐有效缓解了Sr和SO _2的挥发, 它们在熔盐中以 SrCO ₃和硫酸盐的形式被捕获。^{此外，Sr 2+}的存在显着提高了残渣中硫的去除率，从 54.77% 提高到 69.27%，并在 450 °C 下有效地将 CERs 的破坏和去除效率从 47.31% 提高到 60.35%。这些发现表明，熔融碳酸盐可能是提高 Sr 催化性能的合适介质。