TANG Anyu1, HE Manli2, CHEN Jiuyu1, ZHOU Xinhao1, WANG Bingjia1, WANG Junyi1, YANG Yi1
(1. School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse,Nanjing 210094, China; 2. Department of Basic,Institute of PLA Army Engineering, Nanjing 210001, China)
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-CuO, 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
中图分类号：TB4; X34
文献标志码：A
文章编号：1008-5548(2021)03-0080-09
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。
