WANG Junyi, CHEN Jiuyu, WANG Peng, YANG Yi

(School of Environmental and Biological Engineering, Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, China)

Abstract: In order to improve the adsorption performance of hydrotalcite (LDH) on iodine ions (I-) in water, a copper-based LDH material was prepared by co-precipitation method, and Ag2O was supported in the material by impregnation method, and then calcined to obtain Ag-loaded calcined hydrotalcite materials (Ag-CLDH). The materials were characterized by scanning electron microscopy, X-ray diffraction, and infrared spectroscopy. The effects of Ag-CLDH on I- adsorption capacity under different pH value and interfering ion conditions were also explored. The results show that the loading of Ag does not destroy the layered structure of the material itself, indicating that the Ag-CLDH material is successfully prepared; the adsorption capacity in neutral solutions can reach 166.47 g/kg; Ag-CLDH maintained good removal efficiency for I- adsorption, copper and silver can capture I- in solution to generate AgI and CuI respectively.

Keywords: Ag-loaded; calcined hydrotalcite; iodide; adsorption

中图分类号：TB4； X34                            文献标志码：A

文章编号：1008-5548(2020)04-0021-07

DOI:10.13732/j.issn.1008-5548.2020.04.004

收稿日期： 2019-12-20，修回日期：2020-01-16，在线出版时间：2020-05-07 14:29。

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项目，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：386180818@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：yyi301@163.com。