WANG Junyi, CHEN Jiuyu, WANG Peng, YANG Qining, LIU Ying, YANG Yi

(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)

Abstract:In order to improve the adsorption performance of layered double hydroxides (LDHs) on iodide in water, copper-based layered double hydroxides (LDHs) were prepared by co-precipitation method, and we synthesized the CLDH and Cu-Cu₂O-CLDH by calcination and reduction respectively. We explored the adsorption properties for I^- in water. Scanning electron microscopy found small particles on the surface of Cu-Cu₂O-CLDH. X-ray diffraction results confirmed that these small particles were Cu and Cu₂O.Specific surface area test results showed that the specific surface area of Cu-Cu₂O-CLDH reaches 316.76 m2/g, which is much larger than that of LDH and CLDH materials.The result of the adsorption showed that compared with LDH and CLDH, the saturated uptake capacity of Cu-Cu₂O-CLDH to I^- was increased form 23.8 mg/g and 84.8 mg/g to 134.5 mg/g respectively. According the result of adsorption experiment and the characterization of the sample after adsorption, we find that Cu-Cu₂O can react with I^- to form CuI, and due to the synergistic effect with CLDH, the adsorption efficiency of the material for I^- is further improved.

Keywords:layer double hydroxides；Cu-Cu₂O；in-suit growth; iodide adsorption

中图分类号：X34                                 文献标志码：A

收稿日期： 2019-04-08， 修回日期：2019-05-07，在线出版时间：2019-06-20 16:29。

基金项目：国家自然科学基金青年科学基金项目，编号：11805101；江苏省环保科研课题，编号：2018012。

第一作者简介：王俊议(1995—)，男，硕士研究生，研究方向为环境功能材料，E-mail：WJYNLG04@163.com。

通信作者简介：王鹏(1989—)，男，博士，讲师，研究方向为辐射探测，E-mail：wp739130046@njust.edu.cn；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。

文章编号：1008-5548(2019)05-0001-07

DOI:10.13732/j.issn.1008-5548.2019.05.001