title: In situ growth of monodispersed Fe3O4 nanoparticles on graphene for the removal of heavy metals and aromatic compounds.
abstract: We report on the efficient removal of heavy metal ions and aromatic compounds from simulated wastewater with a nanocomposite. The nanocomposite was obtained via thermal decomposition of the precursor Fe(acac)3 onto the surface of graphene, modified by diethylenetriamine pentaacetic anhydride through dopamine. It was found that the maximum adsorption capacity of the nanocomposite toward Cu(2+) and naphthalene was 207.9 and 72.2 mg g(-1) respectively, displaying a high efficiency for the removal of heavy metal ions as well as aromatic compounds at pH 7.0 and 293 K. The Langmuir for naphthalene and the Freundlich for the Cu(2+) adsorption isotherms were applicable for describing the removal processes. Furthermore, the nanocomposite was carefully examined by transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectra, and UV-vis spectroscopy. This work provides a very efficient, fast and convenient approach to exploring a promising nanocomposite for water treatment.
authors: Department of Applied Chemical Engineering, Lanzhou Petrochemical College of Vocational Technology, Lanzhou, Gansu, 730060, China E-mail: wuhaixia9410@163.com.
authors: Hai-Xia
authors: HX
authors: Wu
authors: Department of Applied Chemical Engineering, Lanzhou Petrochemical College of Vocational Technology, Lanzhou, Gansu, 730060, China E-mail: wuhaixia9410@163.com.
authors: Jia-Wei
authors: JW
authors: Wu
authors: Department of Applied Chemical Engineering, Lanzhou Petrochemical College of Vocational Technology, Lanzhou, Gansu, 730060, China E-mail: wuhaixia9410@163.com.
authors: Zhi-Gang
authors: ZG
authors: Niu
authors: Department of Applied Chemical Engineering, Lanzhou Petrochemical College of Vocational Technology, Lanzhou, Gansu, 730060, China E-mail: wuhaixia9410@163.com.
authors: Xiu-Li
authors: XL
authors: Shang
authors: College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China.
authors: Jun
authors: J
authors: Jin
mesh_terms: D000327:Adsorption; D004298:Dopamine / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D019216:Metals, Heavy / Q000302:isolation & purification*; D009281:Naphthalenes / Q000302:isolation & purification; D004369:Pentetic Acid / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification
chemical_list: D058185:Magnetite Nanoparticles; D019216:Metals, Heavy; D009281:Naphthalenes; D014874:Water Pollutants, Chemical; C031721:naphthalene; D006108:Graphite; D004369:Pentetic Acid; D004298:Dopamine