摘要：为了有效处理含铀废水以防止其污染环境,通过对聚丙烯织物进行预辐射接枝引入环氧基团,待1,3-丙二胺开环后,再通过氮杂迈克尔加成和胺肟化制备了PP-g-AO织物;利用扫描电镜、红外光谱和热重分析对PP-g-AO织物进行了表征,研究了pH值、铀酰离子平衡浓度、反应时间和反应温度对PP-g-AO织物的吸附性能的影响,并进行了等温吸附模型、动力学和热力学分析。结果表明:PP-g-AO织物的吸附容量随铀酰离子平衡浓度的增大而增大;在pH为6时,吸附容量达到峰值;当反应时间为4 h时,吸附容量接近饱和; PP-g-AO织物吸附铀酰离子过程更符合Langmuir模型,属于单分子层吸附;吸附过程较符合准二级动力学模型,是由材料表面活性位点数目和结构共同决定的;吸附过程为自发的吸热过程,提高温度有利于吸附铀酰离子。

关键词：PP-g-AO织物；辐射接枝；铀酰离子；吸附性能

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