title: Removal of methylene blue from aqueous solution with magnetite loaded multi-wall carbon nanotube: kinetic, isotherm and mechanism analysis.
abstract: In this study, we have demonstrated the efficient removal of cationic dye, methylene blue (MB), from aqueous solution with the one-pot solvothermal synthesized magnetite-loaded multi-walled carbon nanotubes (M-MWCNTs). The as-prepared M-MWCNTs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. The effects of contact time, initial dye concentration, and solution pH on the adsorption of MB onto M-MWCNTs were systematically studied. It was shown that the MB adsorption was pH-dependent. Adsorption kinetics was best described by the pseudo-second-order model. Equilibrium data were well fitted to the Langmuir isotherm model, yielding maximum monolayer adsorption capacity of 48.06 mg g(-1). FTIR analysis suggested that the adsorption mechanism was possibly attributed to the electrostatic attraction and π-π stacking interactions between MWCNTs and MB.
authors: Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, PR China. ah_aihong@163.com
authors: Lunhong
authors: L
authors: Ai
authors: Chunying
authors: C
authors: Zhang
authors: Fang
authors: F
authors: Liao
authors: Yao
authors: Y
authors: Wang
authors: Ming
authors: M
authors: Li
authors: Lanying
authors: L
authors: Meng
authors: Jing
authors: J
authors: Jiang
mesh_terms: D000327:Adsorption; D052203:Ferrosoferric Oxide; D007700:Kinetics; D008751:Methylene Blue / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D037742:Nanotubes, Carbon; D012996:Solutions; D014867:Water; D008751:Methylene Blue; D052203:Ferrosoferric Oxide