Co-adsorption performance of iodine and NO X in iodine exhaust gas by NH 2 -MIL-125

• Published in: Journal of hazardous materials 2024-05, Vol.470, p.134237
• Main Authors: Liang, Xuanhao, Chen, Guangyuan, Zhang, Hao, Zhang, Ling, Duan, Tao, Zhu, Lin
• Format: Article
• Language: English
• ISSN: 1873-3336
• DOI: 10.1016/j.jhazmat.2024.134237

Ti-based MOFs exhibit ultra-high stability in radioactive waste gases containing nitrogen oxides (NO ) and are effective in capturing radioactive iodine. In this study, NH -MIL-125 was synthesized via a one-pot solvothermal method and its adsorption performance for iodine was investigated using batch adsorption experiments, the stability of materials was tested by simulating post-processing conditions. The results indicated that NH -MIL-125 had a maximum iodine adsorption capacity of 1.61 g/g at 75 ℃ and reached adsorption equilibrium within 60 min, and the adsorption capacity of methyl iodine reached 776.9 mg/g. The material also exhibited excellent stability and iodine adsorption performance in the presence of NO . After soaking in NO for 24 h, its structure remained stable and the adsorption capacity for iodine remained at 231.5 mg/g. The excellent co-adsorption performance of NH -MIL-125 on iodine and NO was attributed to the synergistic effects of Ti-OH groups and amino functional groups. These findings provide a reference for the capture of radioactive iodine and also demonstrate the potential of NH -MIL-125 for iodine capture during spent fuel reprocessing.