School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Nanjing University of Information Science & Technology, Nanjing, 210044, China.
J Environ Radioact. 2023 Sep;265:107211. doi: 10.1016/j.jenvrad.2023.107211. Epub 2023 Jun 16.
Due to the critical importance of capturing radioiodine from aquatic environments for human health and ecosystems, developing highly efficient adsorbent materials with rapid kinetics for capturing iodide ions in aqueous solutions is urgently needed. Although extensive research has been conducted on iodine adsorption in gas and organic phases, limited research has been dedicated to adsorption in aqueous solutions. An effective technique for removing iodide was proposed using Ag@Cu-based MOFs synthesized by incorporating Ag into calcined HKUST-1 with varying mass ratios of Ag/Cu-C. Extensive characterization using SEM, XRD, XPS, and nitrogen adsorption-desorption analysis confirmed successful incorporation of Ag in Cu-C. Batch adsorption experiments were conducted, demonstrating that the 5% Ag@Cu-C material exhibited a high adsorption capacity of 247.1 mg g at pH 3. Mechanism investigations revealed that Cu and dissolved oxygen in water generate CuO and HO, while Ag and a small amount of CuO generate AgO and CuO. Furthermore, iodide ions in the solution are captured by Cu and Ag adsorption sites. These findings highlighted the potential of Ag@Cu-based MOFs as highly effective adsorbents for iodine anions removal in radioactive wastewater.
由于从水生环境中捕获放射性碘对于人类健康和生态系统至关重要，因此迫切需要开发具有快速动力学的高效吸附材料，以在水溶液中捕获碘离子。尽管已经在气相和有机相中进行了广泛的碘吸附研究，但在水溶液中的吸附研究却有限。本文提出了一种使用 Ag@Cu 基 MOFs 从水中去除碘化物的有效技术，该 MOFs 通过将 Ag 掺入煅烧的 HKUST-1 中，并改变 Ag/Cu-C 的质量比来合成。使用 SEM、XRD、XPS 和氮气吸附-解吸分析进行了广泛的表征，证实了 Ag 在 Cu-C 中的成功掺入。批量吸附实验表明，5%Ag@Cu-C 材料在 pH 3 下具有 247.1mg/g 的高吸附容量。机理研究表明，水中的 Cu 和溶解氧生成 CuO 和 HO，而 Ag 和少量的 CuO 生成 AgO 和 CuO。此外，溶液中的碘离子被 Cu 和 Ag 吸附位捕获。这些发现强调了 Ag@Cu 基 MOFs 作为放射性废水中碘阴离子去除的高效吸附剂的潜力。
