以沸石咪唑骨架ZIF-8与717阴离子型交换树脂为原料,通过机械混合法制备了ZIF-8负载717树脂复合材料。不同条件下ZIF-8负载717树脂对铀酰离子(UO2+2)的吸附行为研究表明,在pH=5.0时,UO2+2在该树脂复合材料上达到最大吸附量191mg/g。吸附等温线研究表明,UO2+2在ZIF-8/717树脂上的吸附是单分子层吸附。吸附前后的PXRD谱图分析表明,ZIF-8/717树脂在pH=3.0的酸性溶液中仍保持结构稳定。
A novel adsorbent 717-resin supported ZIF-8 composite was successfully prepared from mechanical mixing of zeolite imidazole framework ZIF-8 and 717-anion exchange resin for the capture of uranyl (UO2+2) from aqueous solution.The adsorption behavior of ZIF-8/717-resin under different conditions was studied.The results showed that the maximum adsorption capacity of 191mg/g for UO2+2was achieved at pH=5.0.Adsorption kinetics and isotherm study shown that the adsorption of UO2+2 on ZIF-8/717-resin was a monolayer sorption process.The PXRD patterns before and after adsorption showed that the structure of ZIF-8/717-resin remained stable in acidic solution with pH=3.0.
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基金资助
国家自然科学基金项目(11775037)
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