Adsorption characteristics of methyl blue onto magnetic Ni0.5Zn0.5Fe2O4 nanoparticles prepared by the rapid combustion process

Abstract

A rapid combustion process for the preparation of magnetic Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles was introduced, which was composed of the preparation process of solution, combustion process and calcination process. The structure and properties of the as-prepared product were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and vibrating sample magnetometer. The results revealed that the volume of absolute alcohol and the calcination temperature were two key parameters for the preparation of Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles. With the volume of absolute alcohol increasing from 15 to 100 mL, the particle size of Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles calcined at 400 C for 2 h increased from 18 to 25 nm, and the saturation magnetization increased from 3.4 to 66.3 Am 2 /kg; while with the calcination temperature increasing from 400 to 700 C with 20 mL absolute alcohol, the particle size increased from 20 nm to 47 nm, the saturation magnetizations increased from 13.1 to 66.0 Am 2 /kg, and the specific surface area decreased from 102.99 to 0.13 m 2 /g. The adsorption characteristics of methyl blue (MB) onto Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles at room temperature were investigated, and the regression equation was found in good agreement with the pseudo-second-order adsorption kinetics model with the initial MB concentrations of 50-200 mg/L; the adsorption equilibrium data of MB onto Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles at room temperature were analyzed with Langmuir, Freundlich and Temkin models, and the adsorption isotherm was most effectively described by the Temkin model based on the value of the correlation coefficient (0.9931); the effect of pH on the adsorption of MB was examined, and the reusability of Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles for adsorbing of MB revealed their excellent removal efficiency. HIGHLIGHTS• Magnetic Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles are prepared via a rapid combustion process. • They show a high methyl blue (MB) absorption capacity at room temperature. • The pseudo-second-order kinetic model can describe the adsorption of MB.• Temkin model can explain the adsorption isotherm of MB onto Mn 0.5 Co 0.5 Fe 2 O 4 nanoparticles.

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

“…Similar kinetic results were also obtained by He et al who performed the sorption of Congo red onto magnetic MnFe 2 O 3 nanosheets. Liu et al also reported similar phenomena in case of removal study of methyl blue onto magnetic Mn 0.5 Co 0.5 Fe 2 O 4 ·NPs.…”

Adsorption and Desorption of Methylene Blue on Porous Carbon Monoliths and Nanocrystalline Cellulose

“…Such results attested the potential use of these promising materials, which can be easily prepared from inexpensive and abundant materials for the removal of recalcitrant contaminants in water and waste waters. Magnetic nanoparticles 45 and/or TiO 2 46 can be readily prepared and incorporated into carbon monoliths via adsorption to facilitate the process design and perform both adsorption and photocatalytic remediation of this blue dye as well as other organic pollutants.…”

Continuous Flow Removal of Anionic Dyes in Water by Chitosan-Functionalized Iron Oxide Nanoparticles Incorporated in a Dextran Gel Column

“…Many reports on the adsorption of anionic dyes in aqueous media using various adsorbents are successfully applied in batch processing for removal of dyes [19,20,21,22,33,34,35,36,37,38,39]. However, these processes frequently require an additional process to separate the solid adsorbents from the water after the purification procedure is finished.…”