一种新型聚合物VDE用于快速吸附水中的硝酸盐  

A Novel Polymer VDE for Rapid Adsorption of Nitrate in Water

作　　者：胡伟[1,2] 祝凯 吴汾奇 李燕 HU Wei;ZHU Kai;WU Fenqi;LI Yan(Key Laboratory of Groundwater Resources and Environment of Ministry of Education,Jilin University,Changchun 130021,China;College of New Energy and Environment,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,长春130021 [2]吉林大学新能源与环境学院,长春130021

出　　处：《吉林大学学报（理学版）》2023年第1期179-188,共10页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:41907163)。

摘　　要：针对水中硝酸盐污染的问题,合成一种新型的聚合物乙烯基咪唑/二溴癸烷/二甲基丙烯酸乙二醇(VDE),通过扫描电子显微镜(SEM)、Fourier变换红外光谱仪(FT-IR)和X射线光电子能谱(XPS)对其结构进行表征,并研究其在含硝酸盐水溶液的最佳剂量比、pH值、吸附温度、吸附时间以及重复利用性.结果表明,在15℃,pH=4时,VDE对硝酸盐氮的吸附量通过Langmuir模型拟合为28.31 mg/g,该吸附过程在10 min可达到平衡,且符合准一级和准二级动力学拟合模型,在5次吸附/脱附实验后,其吸附量仍可达到首次使用吸附量的95.5%,表明该材料可有效净化低质量浓度的硝酸盐废水.Aiming at the problem of nitrate pollution in water,we synthesized a novel polymer vinylimidazole/dibromodecane/ethylene glycol dimethacrylate(VDE),its structure was characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),X-ray photoelectron spectroscopy(XPS),and its optimal dose ratio,pH value,adsorption temperature,and reusability in aqueous solutions containing nitrate were investigated.The results show that the adsorption capacity of nitrate nitrogen on VDE at 15℃and pH=4 is 28.31 mg/g by Langmuir model,and this adsorption process can reach the equilibrium in 10 min,and it is in accordance with the quasi-primary and quasi-secondary kinetic fitting model,and its adsorption capacity can still reach 95.5%of the first use after five adsorption/desorption experiments,which indicates that this material can effectively purify nitrate wastewater with low mass concentration.

关 键 词：硝酸盐 吸附 聚合物 季铵化 

分 类 号：X131.2[环境科学与工程—环境科学] O63[理学—高分子化学]