title: Synthesis of Fe3O4/Polyacrylonitrile Composite Electrospun Nanofiber Mat for Effective Adsorption of Tetracycline.
abstract: Novel Fe3O4/polyacrylonitrile (PAN) composite nanofibers (NFs) were prepared by a simple two-step process, an electrospinning and solvothermal method. Characterization by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) demonstrated formation of a uniform nanoparticles coating (about 20 nm in thickness) on the PAN nanofiber backbone. The coating was constructed by well-crystallized cubic phase Fe3O4 nanoparticles as examined by X-ray diffraction spectroscopy (XRD). The coating doubled the specific surface area of NFs, from 8.4 to 17.8 m2 g(-1), as confirmed by nitrogen sorption isotherm analysis. To evaluate the feasibility of Fe3O4/PAN composite NFs as a potential adsorbent for antibiotic removal, batch adsorption experiments were conducted using tetracycline (TC) as the model antibiotic molecule. The results showed that Fe3O4/PAN composite NFs were effective in removing TC with no impactful loss of Fe in the pH regime of environmental interest (5-8). The adsorption of TC onto Fe3O4/PAN composite NFs better fitted the pseudo-second-order kinetics model, and the maximum adsorption capacity calculated from Langmuir isotherm model was 257.07 mg g(-1) at pH 6. The composite NFs also exhibited good regenerability over repeated adsorption/desorption cycles. Surface complexation between TC and the composite NFs contributed most to the adsorption as elucidated by X-ray photoelectron spectroscopy (XPS). This highly effective and novel adsorbent can be easily modularized and separated, promising its huge potential in drinking and wastewater treatment for antibiotic removal.
authors.affiliation: †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.|‡College of Resources and Environment, University of Chinese Academy of Sciences, 19A Yuquan RoadBeijing 100049, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
authors.affiliation: †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.
authors.forename: Lu-Bin
authors.initials: LB
authors.lastname: Zhong
authors.affiliation: §Department of Biological Systems Engineering, Washington State University, Box 646120, Pullman, Washington 99164-6120, United States.
authors.forename: Quan-Bao
authors.initials: QB
authors.lastname: Zhao
authors.affiliation: §Department of Biological Systems Engineering, Washington State University, Box 646120, Pullman, Washington 99164-6120, United States.
authors.forename: Craig
authors.initials: C
authors.lastname: Frear
authors.affiliation: †CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: Zheng
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D004595:Electroplating / Q000379:methods; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008422:Materials Testing; D008567:Membranes, Artificial; D053761:Nanocomposites / Q000737:chemistry / Q000648:ultrastructure; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D013752:Tetracycline / Q000737:chemistry / Q000302:isolation & purification*; D014462:Ultrafiltration / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000180:Acrylic Resins; D058185:Magnetite Nanoparticles; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; C010504:polyacrylonitrile; D013752:Tetracycline
keywords: adsorption; antibiotic; electrospinning; nanofiber; solvothermal