聚咪唑／有序介孔碳互穿网络复合材料吸附 U（Ⅵ）的性能研究

摘要

通过自由基聚合方法，将功能化介孔碳（OCMK‐3）与N‐烯丙基单体相结合，制备了带有互穿网络结构的聚咪唑／有序介孔碳（AIM／OCMK‐3）复合材料，并采用FT‐IR、SEM 和氮气吸附‐脱附等温线对复合材料进行了表征。系统研究了溶液pH值、U（Ⅵ）初始浓度、反应时间、温度等因素对AIM／OCMK‐3吸附U（Ⅵ）性能的影响。结果表明，pH＝4畅0时AIM／OCMK‐3对 U（Ⅵ）的吸附能力最高，吸附平衡时间为30 min。相较于CMK‐3，AIM／OCMK‐3单分子层饱和吸附容量由40畅90 mg／g增大至213畅01 mg／g。HCl为最佳洗脱溶液，AIM／OCMK‐3在吸附‐脱附铀的过程中有较好的稳定性，可重复使用。%The polyimidazole/ordered mesoporous carbon composite with interpenetra‐ting framework (AIM/OCMK‐3) was prepared by functionalizing mesoporous carbon (OCMK‐3) via radical polymerization . AIM/OCMK‐3 was characterized by FT‐IR , SEM and N2 adsorption‐desorption techniques . The effects of different experimental parameters such as initial pH ,initial concentration of U (Ⅵ) ,contact time and tempera‐ture on adsorption were investigated .The results show that AIM/OCMK‐3 show the highest U (Ⅵ) adsorption capacity at initial pH of 4.0 and contact time of 30 min ,and adsorption capacity increases from 40.90 mg/g to 213.01 mg/g after functionalizing . HCl is the preferred elution solution ,AIM/OCM K‐3 has good stability in the process of uranium in adsorption and desorption ,and AIM/OCM K‐3 can be reused .