SUN Yanbina, CHEN Jiuyua, ZHOU Xinhaoa, LI Xiaoshana, GAO Qianhonga, LIU Yinga,b
(a. School of Environmental and Biological Engineering; b. State Key Laboratory of NBC Protection for Civilian,Nanjing University of Science and Technology, Nanjing 210094, China)
Abstract:In order to effectively treat the wastewater containing uranium to prevent its pollution to the environment, PP-g-AO fabric was prepared by introducing the epoxy group through the pre-radiation grafting of polypropylene fabric, and after the ring was opened by 1, 3-propylene diamine, the PP-g-AO fabric was prepared by the addition of aza-Mike and amine oxime. PP-g-AO fabric was characterized by scanning electron microscopy, infrared spectroscopy and thermogravimetric analysis.The effects of pH value, uranyl ion equilibrium concentration, reaction time and temperature on the adsorption properties of PP-g-AO fabric were studied.The results show that the adsorption capacity of PP-g-AO fabric increases with the increase of uranyl ion equilibrium concentration.When the pH value is 6, the adsorption capacity reaches the peak.When the reaction time is 4 h, the adsorption capacity isclose to saturation. The uranyl ion adsorption process of PP-g-AO fabric is more consistent with the Langmuir model and belongs to single molecular layer adsorption. The adsorption process conforms to the quasi-secondary kinetic model, which is determined by the number and structure of active sites on the surface of the materialsurface.The adsorption process is a spontaneous endothermic process. Increasing the temperature is beneficial to the adsorption of uranyl ions.
Keywords: PP-g-AO fabric; radiation grafting; uranyl ion; adsorption property
文章编号：1008-5548(2020)03-0015-07
DOI:10.13732/j.issn.1008-5548.2020.03.003
中图分类号：TL13；X34 文献标志码：A
收稿日期： 2019-11-25，修回日期：2020-03-07，在线出版时间：2020-04-03 15:26。
基金项目：国家重点实验室科研基金项目，编号：SKLNBC2019-20。
第一作者简介：孙艳斌(1992—)，男，硕士研究生，研究方向为环境功能材料。E-mail：117102021602@njust.edu.cn。
通信作者简介：刘颖(1978—)，女，博士，讲师，硕士生导师，研究方向为环境功能材料和辐射监测。E-mail：yingliu@njust.edu.cn。
