AlNeyadi Shaikha S, Alhassani Mohammed T, Aleissaee Ali S, J Sultan, Khalaf Abdullah H, Alteneij Abdulrahman A, Alyaarbi Yaser Y
Department of Chemistry College of Science, UAE University Al-Ain, 15551, United Arab Emirates.
Department of Chemical Engineering, College of Engineering, Al Ain, 15551, United Arab Emirates.
Heliyon. 2024 Feb 14;10(4):e25921. doi: 10.1016/j.heliyon.2024.e25921. eCollection 2024 Feb 29.
Nuclear energy continues to be an important supplier of electricity, but it has problems with waste management and the possibility to leak radioactive material. Iodine, a potentially harmful byproduct of uranium fission, is hazardous to both the environment and human health. Therefore, developing safe, effective, and affordable storage facilities for iodine waste is crucial. Owing to their well-controlled pore structure and substantial certain surface area, covalent organic frameworks (COFs) show promise for the adsorption of radioactive iodine. The newly developed COFs (SJ-COF, YA-COF, and AA-COF) shown amazing properties, including strong thermal and chemical stability, which made them ideal for efficient iodine capture. Notably, the ultrahigh iodine capture capacities of these COFs-8.52 g g, 8.12 g g and 7.01 g g-were significantly greater than most previously reported materials. And The % removal efficiency for SJ-COF, YA-COF and AA-COF from I/cyclohexane solutions were 87.9 %, 88.6% and 82.6 % respectively. It is noteworthy that the three COFs have high selectivity, reusability, and iodine retention abilities, maintaining iodine even after five recyclings. Based on the outcomes of the experiments, the adsorption processes of the three COFs were examined, and it was discovered that iodine was bound through physical-chemical adsorption. The findings of our work provide a ground-breaking standard for the removal of nuclear waste and demonstrate the enormous potential of COFs as adaptable porous structures that may be specifically designed to address major environmental concerns.
核能仍然是电力的重要供应源，但它存在废物管理问题以及放射性物质泄漏的可能性。碘是铀裂变产生的一种潜在有害副产品，对环境和人类健康都有危害。因此，开发安全、有效且经济实惠的碘废物储存设施至关重要。由于其可控的孔结构和较大的比表面积，共价有机框架（COF）在吸附放射性碘方面显示出潜力。新开发的COF（SJ-COF、YA-COF和AA-COF）展现出惊人的性能，包括强大的热稳定性和化学稳定性，这使其成为高效捕获碘的理想材料。值得注意的是，这些COF的超高碘捕获容量——8.52 g/g、8.12 g/g和7.01 g/g——显著高于大多数先前报道的材料。并且，SJ-COF、YA-COF和AA-COF对碘/环己烷溶液的去除效率分别为87.9%、88.6%和82.6%。值得注意的是，这三种COF具有高选择性、可重复使用性和碘保留能力，即使经过五次循环仍能保持碘。基于实验结果，研究了这三种COF的吸附过程，发现碘是通过物理化学吸附结合的。我们的工作结果为核废物的去除提供了一个开创性的标准，并证明了COF作为可专门设计用于解决重大环境问题的适应性多孔结构的巨大潜力。
