磁性分子印迹麦秆炭吸附环丙沙星性能研究  

Study on Adsorptive Performance of Ciprofloxacin by Molecularly Imprinted Polymers Based on Magnetic Wheat Straw Biochar

作　　者：毛艳丽[1,2] 李朝阳 刘超朋 田丽 康海彦 宋忠贤[1] 延旭 王召东 MAO Yan-li;LI Zhao-yang;LIU Chao-peng;TIAN Li;KANG Hai-yan;SONG Zhong-xian;YAN Xu;WANG Zhao-dong(Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology,Henan University of Urban Construction,Pingdingshan 467036,China;School of Civil and Surveying Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]河南城建学院河南省水体污染控制与修复重点实验室,河南平顶山467036 [2]江西理工大学土木与测绘工程学院,江西赣州341000

出　　处：《化学试剂》2021年第12期1631-1637,共7页Chemical Reagents

基　　金：国家自然科学基金资助项目(U1904174);河南省高等院校重点学科项目(20A610003);河南城建学院青年骨干教师资助项目(YCJQNGGJS201903)。

摘　　要：通过原子转移自由基聚合法在乙烯基改性的磁性麦秆颗粒表面形成聚合层得到磁性分子印迹材料(MMIPs)。傅里叶红外光谱(FT-IR)、热重分析(TGA)表征吸附剂表面印迹聚合层具有识别功能;pH变化、热力学和动力学的吸附实验表明25℃、pH 6时MMIPs在40 min内对环丙沙星呈Langmuir(R^(2)=0.999)单层吸附82.26 mg/g及拟二级动力学(R^(2)=0.999)化学主导的81.66 mg/g最大吸附容量,可循环吸附5次。MMIPs对四环素(TC)、磺胺二甲基嘧啶(SMZ)、恩诺沙星(ENR)竞争吸附表明MMIPs具有选择性吸附能力。Magnetic molecularly imprinted materials(MMIPs)were prepared by atom transfer radical polymerization on the surface of vinyl modified magnetic wheat straw particles.The recognition function on the surface of the polymeric layer of adsorbent was characterized by FT-IR and TGA.The adsorption experiments on pH,thermodynamics and kinetics showed that Ciprofloxacin(CIP)was adsorbed by MMIPs at pH 6 at 25℃for 40 min.With a maximum adsorption capacity of 82.26 mg/g by the Langmuir(R^(2)=0.999)monolayer adsorption while that of 81.66 mg/g by the pseudo second-order kinetics(R^(2)=0.999).MMIPs could be reused for five times.The competitive adsorption of Tetracycline(TC),Sulfamethazine(SMZ),and Enrofloxacin(ENR)indicated that MMIPs exhibited selective adsorption capacity.

关 键 词：生物炭质材料 环丙沙星 分子印迹 特异识别性吸附 聚合层 离子空穴 

分 类 号：X703.1[环境科学与工程—环境工程]