PEI@SA微球制备及其对甲基蓝的吸附研究  

PEI@SA Microsphere Preparation and Its Adsorption to Methyl Blue

作　　者：李志 肖远淑[1,2] 李帅 单国华 Li Zhi;Xiao Yuanshu;Li Shuai;Shan Guohua(College of Textile and Clothing,Xinjiang University,Urumqi,Xinjiang 830017,China;Xinjiang Key Laboratory of Characteristic Textiles and Clean Dyeing and Finishing Technology,Urumqi,Xinjiang 830017,China)

机构地区：[1]新疆大学纺织与服装学院,新疆乌鲁木齐830017 [2]新疆特色纺织品与清洁染整技术重点实验室,新疆乌鲁木齐830017

出　　处：《针织工业》2024年第6期33-37,共5页Knitting Industries

基　　金：国家科技部重大专项子课题(2016YFC0400504);自治区科技计划项目-重点研发专项(2022B01045-4);新疆大学博士科研启动基金项目(500123006)。

摘　　要：以海藻酸钠(SA)为基材,通过交联法制备聚乙烯亚胺(PEI)改性吸附剂PEI@SA,研究其对甲基蓝(MB)的吸附性能。采用SEM和FTIR对吸附剂表面形貌和化学结构进行表征。考察pH值、初始染料浓度、吸附时间对吸附性能的影响,然后对吸附过程进行等温线模型和动力学模型拟合。结果表明:PEI@SA对MB的吸附符合Langmuir吸附模型和准二级动力学模型,吸附过程为单分子层吸附,以化学吸附为主。25°C时对MB最大吸附量为88.34 mg/g,是未改性SA的10倍。PEI@SA adsorbent based on sodium alginate(SA)integrated with polyethyleneimine(PEI)was prepared using crosslinking method,which was employed for the elimination of methyl blue(MB).The chemical structure and the surface morphology of PEI@SA were characterized by FTIR and SEM.Subsequently,the influence of pH value,initial dye concentration and adsorption time on the MB adsorption was explored.Then,the adsorption process was fitted with isotherm model and kinetic model.The results show that the adsorption of MB is aligned to the Langmuir adsorption model and the quasi-second-order kinetic model.PEI@SA presents maximum adsorption capacity of 88.34 mg/g for MB at 25℃,whichis10timeshigherthanthatofpristineSA adsorbent.

关 键 词：海藻酸钠 聚乙烯亚胺 吸附 甲基蓝 等温线 动力学 

分 类 号：X791[环境科学与工程—环境工程]