Cu/Zr/SBA-15的制备及其对水中四环素的吸附性能  

Preparation of Cu/Zr/SBA-15 and its adsorption ability of tetracycline from aqueous solution

作　　者：刘学方[1,2] 孔黎明 丁秀[3] LIU Xuefang;KONG Liming;DING Xiu(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;College of Resources and Environmental Engineering,Yangzhou Polytechnic College,Yangzhou 225009,China;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China)

机构地区：[1]南京理工大学化学与化工学院,南京210094 [2]扬州市职业大学资源与环境工程学院,江苏扬州225009 [3]扬州大学化学化工学院,江苏扬州225002

出　　处：《扬州大学学报（自然科学版）》2022年第6期71-78,共8页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省科技厅前瞻性联合研究资助项目(BY2016069-03).

摘　　要：为高效去除废水中残留的四环素,通过水热合成法制备了Cu、Zr掺杂的SBA-15介孔分子筛Cu/SBA-15、Zr/SBA-15和Cu/Zr/SBA-15.通过XRD、FT-IR、SEM等对样品进行表征,并进行N_(2)吸附-脱附实验.结果表明,3种分子筛样品均具有孔道均一的介孔结构,活性组分Cu、Zr在Cu/Zr/SBA-15上分散均匀.3种样品中,Cu/Zr/SBA-15对四环素的吸附性能最佳,主要是因为Cu(Ⅱ)和四环素分子上供电子基团的配位作用以及Zr(Ⅳ)产生的路易斯酸与供电子基团的酸碱吸附作用.通过Langmuir模型对吸附平衡数据拟合,20,30,40℃时Cu/Zr/SBA-15对四环素的饱和吸附量分别为127.9,160.4,185.3 mg·g^(-1).Cu/Zr/SBA-15吸附四环素的过程符合拟二级动力学模型,吸附速率快,稳定性较好.In order to adsorb tetracycline in the water,Cu,Zr modified SBA-15 materials are prepared by hydrothermal method and characterized by XRD,FT-IR,SEM and N_(2) adsorption-desorption experiment is carried out.The prepared samples show high ordered mesoporous structure with a uniform pore size distribution.For Cu/Zr/SBA-15,the Cu and Zr species are well dispersed on the surface of SBA-15.The adsorption experiments show that Cu/Zr/SBA-15 has the best adsorption performance for tetracycline mainly because of the coordination of electron-donating groups on Cu(Ⅱ)and tetracycline and the acid-base adsorption of Lewis acid and electron-donating groups generated by Zr(Ⅳ).The Langmuir model is used to fit the adsorption equilibrium data,and the saturated adsorption capacities of Cu/Zr/SBA-15 for tetracycline at 20,30,40℃are 127.9,160.4,185.3 mg·g^(-1),respectively.The TC adsorption kinetic on Cu/Zr/SBA-15 fits the pseudo-second-order kinetic model well.Cu/Zr/SBA-15 shows higher adsorption rate and good stability.

关 键 词：Cu/Zr/SBA-15 介孔分子筛 吸附 四环素 

分 类 号：X703.1[环境科学与工程—环境工程]