Abstract
Magnetic MnFe2O4 nanorods were fabricated via the alcohol-solution combustion and calcination process. The morphology, microstructure, and composition of the as-prepared MnFe2O4 nanorods were characterized by x-ray diffraction, energy dispersive spectroscopy, and transmission electron microscopy and using a vibrating sample magnetometer. In addition, the magnetic MnFe2O4 nanorods were employed to remove methyl blue (MB) from aqueous solutions; the experimental results showed that the pseudo-second-order kinetic model was fitted well for the adsorption of MB onto MnFe2O4 nanorods in the initial MB concentration range of 100–400 mg l−1, while the isotherm data of MB onto MnFe2O4 nanorods could conform to the Langmuir model owing to the value of the square deviation (R2 > 0.99), and the maximum adsorption capacity of MB was 102.2 mg g−1, which suggested that the adsorption mechanism of MB onto MnFe2O4 nanorods at room temperature was the monolayer and multilayer adsorption. The effects of the solution pH and the recycle on the MB adsorption were evaluated. The adsorption capacity of MB onto MnFe2O4 nanorods could keep a high level at pH greater than 5. More than 78% of the removal efficiency of MB onto MnFe2O4 nanorods could be maintained after 10 cycles.
Highlights
Magnetic MnFe2O4 nanorods were fabricated via the alcohol-solution combustion and calcination process
The morphology, microstructure, and composition of the as-prepared MnFe2O4 nanorods were characterized by x-ray diffraction, energy dispersive spectroscopy, and transmission electron microscopy and using a vibrating sample magnetometer
The magnetic MnFe2O4 nanorods were employed to remove methyl blue (MB) from aqueous solutions; the experimental results showed that the pseudo-second-order kinetic model was fitted well for the adsorption of MB onto MnFe2O4 nanorods in the initial MB concentration range of 100–400 mg l−1, while the isotherm data of MadBsoornpttoioMn cnaFpea2cOit4ynoafnMorBodwsacso1u0l2d.2comngfogr−m1,towhthicehLsaungggmesutierdmthoadtetlhoewaidnsgotroptthioenvmalueechoafnthisemsqoufaMreBdoenvitaotiMonn(FRe22
Summary
With the development of society and economy, the problem of environmental pollution is becoming more and more serious. Among them, dye is one important source of environment contaminations, according to the statistics, more than 7 × 105 tons of dyes are produced and applied, if they are discharged into the environment, the ecological balance of the environment will be destroyed, many of them or their metabolites can cause toxicities to microorganisms and lives, even some of them can cause cancers, especially the diazo dyes. the removal of the dyes from wastewater becomes more and more significant. In order to develop a new and facile method for the preparation of MnFe2O4 nanorods, the alcohol-solution combustion process with the characteristics of simple operation, free of dispersants, short preparation time, and homogeneous products was employed. This study will focus on preparation of the MnFe2O4 nanorods for the removal of methyl blue (MB) from aqueous solutions. In this project, magnetic MnFe2O4 nanorods were fabricated via the alcohol-solution combustion and calcination process, and their morphology, composition, and structure were characterized. Methyl blue (MB) was employed to reveal the adsorption mechanism of MnFe2O4 nanorods, which would provide essential data for the removal of the diazo dyes onto magnetic nanomaterials
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
