唐安宇1， 何曼丽2， 陈九玉1， 周鑫浩1， 王丙佳1， 王俊议1， 杨 毅1
（1. 南京理工大学 环境与生物工程学院； 江苏省化工污染控制与资源化重点实验室， 江苏 南京 210094；2. 陆军工程大学 基础部， 江苏 南京 210001）
DOI:10.13732/j.issn.1008-5548.2021.03.011
收稿日期： 2020-12-09，修回日期：2021-01-12，在线出版时间：2021-04-07 14:05。
基金项目：国家自然科学基金项目，编号：11805101；江苏省环保科研课题，编号：JSZCD 2018-044；江苏省凹土资源利用重点实验室开放课题，编号：HPK202001。
第一作者简介：唐安宇(1996—)，男，硕士研究生，研究方向为环境功能材料，E-mail：597160564@qq.com。
通信作者简介：杨毅(1973—)，男，博士，研究员，博士生导师，研究方向为环境功能材料，E-mail： yangyi@njust.edu.cn。
摘要：为了提高材料对放射性碘的吸附性能，在制备立方体和十二面体铜基均苯三甲酸(Cu-BTC)材料的基础上，通过调节煅烧气氛环境，获得更为疏松多孔的氧化亚铜-氧化铜(Cu2O-CuO)复合材料。通过扫描电子显微镜、X射线衍射、红外光谱等手段对材料进行表征，发现所得材料分别为立方体和十二面体的Cu2O-CuO，并依旧保留大部分Cu-BTC结构骨架。对碘离子的吸附实验结果显示，立方体和十二面体的Cu2O-CuO饱和吸附容量分别能够达到49.72、91.91 mg/g。热力学和动力学吸附研究结果表明，2种形貌的Cu2O-CuO均属于以化学吸附为主，符合Langmuir吸附模型的单分子层吸附。制备的Cu2O-CuO能够在吸附时与碘离子生成CuI。吸附剂在弱酸条件吸附性能更强，干扰离子中，弱酸根离子会阻碍材料对碘离子的吸附，而强酸根离子则能一定程度上促进吸附，提升吸附剂吸附性能。
关键词：金属有机骨架化合物；铜基均苯三甲酸；氧化亚铜-氧化铜；放射性碘吸附
Abstract：In order to improve the adsorption performance of the material for radioactive iodine,by adjusting the calcination atmosphere,a more porous Cu2O-CuO composite material was obtained on the basis of preparing cubic and dodecahedral Cu-BTC materials. Through SEM,XRD and FTIR characterization,we found the obtained materials are cubic and dodecahedral Cu2O-Cu O,respectively,and still retain most of the Cu-BTC structure framework. The results of adsorption experiments on iodide ions( I-) show that,the saturated adsorption capacities of the two morphologies( cube and dodecahedron) Cu2O-CuO can reach respectively 49. 72 mg/g and 91. 91 mg/g. Thermodynamic and kinetic adsorption research results show that the two morphologies of Cu2O-CuO belong to monolayer adsorption based on chemical adsorption and conform to the Langmuir adsorption model. The Cu2O-CuO adsorbent can generate CuI during adsorption. The adsorbent has stronger adsorption performance under weak acid conditions. Among the interfering ions,weak acid ions will hinder the material's adsorption of iodide ions,while strong acid ions can promote adsorption to a certain extent and improve the adsorption performance of the adsorbent.
Keywords：Metal organic framework compound; Cu-BTC; Cu2O-CuO; radioactive iodine adsorption
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