Oxadiazole-Functionalized Polyacrylonitrile Fiber as Selective Adsorbent for Mercury Ion  

作　　者：Liping Hou Minli Tao 

机构地区：[1]School of Sciences, Tianjin University

出　　处：《Transactions of Tianjin University》2020年第1期49-56,共8页天津大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.21777111 and 21572156)

摘　　要：A new oxadiazole-functionalized polyacrylonitrile fiber(PANAOF)was successfully fabricated by immobilizing the organic molecule 2-chloromethyl-5-phenyl-1,3,4-oxadiazole on aminated fiber(PANAF).The fibers were characterized completely by Fourier-transform infrared spectroscopy,elemental analysis,X-ray diffraction,and X-ray photoelectron spectroscopy techniques.Compared with PANAF,PANAOF showed a higher adsorption capability for Hg^2+ions in aqueous solutions.The functionalized fiber PANAOF exhibited a highly selective adsorption for Hg^2+when coexisting with other metal ions viz.Pb^2+,Cd^2+,Cu^2+,Zn^2+,Ni^2+,Co^2+,Cr^3+,Ca^2+,and Mg^2+.The PANAOF presented the best adsorption capacity for Hg^2+at pH 5.Moreover,the adsorption experimental data fit well with the pseudo-second-order kinetic model and Langmuir isotherm.Notably,the PANAOF almost retained its original adsorption capacity(112 mg/g)after five cycles,indicating its excellent reusability in practical applications.A new oxadiazole-functionalized polyacrylonitrile fiber(PANAOF) was successfully fabricated by immobilizing the organic molecule 2-chloromethyl-5-phenyl-1,3,4-oxadiazole on aminated fiber（PANAF）.The fibers were characterized completely by Fourier-transform infrared spectroscopy,elemental analysis,X-ray diffraction,and X-ray photoelectron spectroscopy techniques.Compared with PANAF,PANAOF showed a higher adsorption capability for Hg2+ ions in aqueous solutions.The functionalized fiber PANAOF exhibited a highly selective adsorption for Hg2+ when coexisting with other metal ions viz.Pb2+,Cd2+,Cu2+,Zn2+,Ni2+,Co2+,Cr3+,Ca2+,and Mg2+.The PANAOF presented the best adsorption capacity for Hg2+at pH 5.Moreover,the adsorption experimental data fit well with the pseudo-second-order kinetic model and Langmuir isotherm.Notably,the PANAOF almost retained its original adsorption capacity（112 mg/g） after five cycles,indicating its excellent reusability in practical applications.

关 键 词：Polyacrylonitrile fiber MERCURY Adsorption 1 3 4-OXADIAZOLE SELECTIVITY 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]