title: Removal of tetracycline and oxytetracycline from water by magnetic Fe3O4@graphene.
abstract: In this paper, Fe3O4@graphene (Fe3O4@G) magnetic nanocomposite was prepared via in situ precipitation method for the removal of oxytetracycline (OTC) and tetracycline (TC) from aqueous solution. The properties of the prepared nanocomposite were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and magnetic property measurement system (MPMS). Adsorption isotherm and kinetics of OTC and TC were studied in batch experiments. The influence of the dosage of Fe3O4@G, the solution pH, and ion strength on the adsorption process were also assessed. The results demonstrated that the Langmuir model fitted the adsorption equilibrium data better than did the Freundlich model, and the pseudo-first-order model was more suitable than the pseudo-second-order to describe the adsorption process, with a good adsorption rate constant (k = 0.974 and 0.834 g mg-1h-1, respectively). The adsorption ability reached maximum at pH of 7 with no NaCl. The removal efficiency of Fe3O4@G in lake, tap, and pool water were 95.45, 96.68, and 89.82 % for OTC and 98.77, 98.23, and 89.09 % for TC, respectively. The π-π interaction and cation-π bonding of the adsorbent and analytes make it suitable for the removal of OTC and TC. The present study suggests that the prepared composite can be deemed as a promising material for the removal of tetracycline antibiotics from aqueous solution.
authors.affiliation: College of Environment and Energy, Guangzhou, South China University of Technology, Guangzhou, 510006, China.|College of Chemistry and Environmental Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Environmental Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China. jiaoz@dgut.edu.cn.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Jiao
authors.affiliation: College of Environment and Energy, Guangzhou, South China University of Technology, Guangzhou, 510006, China.
authors.forename: Yongyou
authors.initials: Y
authors.lastname: Hu
authors.affiliation: College of Chemistry and Environmental Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China.
authors.forename: Sihao
authors.initials: S
authors.lastname: Lv
authors.affiliation: College of Chemistry and Environmental Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China. fhb666666@163.com.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Fan
authors.affiliation: College of Chemistry and Environmental Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Zeng
authors.affiliation: College of Electronic Engineering, Dongguan, Dongguan University of Technology, Dongguan, 523808, China.|NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
authors.forename: Jun
authors.initials: J
authors.lastname: Hu
authors.affiliation: Dongguan Cleaner Production Center, Dongguan, 523808, China.
authors.forename: Mianmian
authors.initials: M
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites; D010118:Oxytetracycline; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013752:Tetracycline; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D006108:Graphite; D013752:Tetracycline; D010118:Oxytetracycline
keywords: Adsorption; Fe3O4@G; HPLC; OTC; TC