Synthesis and adsorption properties of nanocrystalline ferrites for kinetic modeling development

Abstract

Nanocrystalline ferrites are known to be used in different applications, including industrial wastewater management. For environmental water issues, one of the most widely applied techniques is the adsorption of pollutants. The adsorption capacity of Congo red (CR) dye on different MFe 2 O 4 (M = Co 2+ , Mg 2+ , Mn 2+ , Ni 2+ , and Zn 2+ ) ferrites, synthesized by coprecipitation method, was determined. Specific isotherms and kinetic models were used to characterize the adsorption process. Interesting results were obtained for MgFe 2 O 4 with adsorption capacity ranging from 39% up to 70% dependent on the initial dye concentration. Furthermore, an artificial intelligence model based on neural network was developed in order to model the adsorption rates followed by the generation of 3D adsorption rate models for each type of synthesized ferrite. These models were obtained in order to provide information about the particle-dye system`s kinetics at various initial CR concentration. Specific techniques were used to characterize the functionalized magnetic particles. K E Y W O R D S3D adsorption rate models, adsorption kinetics, artificial neural network modeling, ferrites synthesis

Eco-Friendly Materials Obtained by Fly Ash Sulphuric Activation for Cadmium Ions Removal

“…The presence of different pollutants in water that are characterized by their non-biodegradable nature can affect the environment and humans' health [1][2][3]. Due to pollutants, heavy metals occur in a significant number of places; this type of pollutant represents one of the biggest environmental problems [4,5].…”

Development of a New Eco-Friendly Copolymer Based on Chitosan for Enhanced Removal of Pb and Cd from Water

“…Stock solutions of metal contaminants (Pb, Cd) were prepared at six different concentrations (10,20,40,60,80, and 100 mg L −1 ) using Pb and Cd salts (PbCl 2 , CdCl 2 × H 2 O) and Milli-Q ultrapure water (Millipore, Bedford, MA, USA) with pH adjusted to 5.0. The effects of two parameters (initial metal concentration and contact time) were investigated to study the adsorptive behavior of CHIT-PAAA.…”

Effect of cation distribution on structural and mechanical properties of Y3+ substituted Co-Zn spinel ferrites nanoparticles.

“…Magnetic oxides, in particular spinel ferrites with nano-size dimension have been comprehensively studied due their distinctive physical properties such as high magnetocrystalline anisotropy, high coercivity, very high chemical and mechanical stability, moderated saturation magnetization, low losses of eddy currents and low conductivity [1][2][3][4][5]. Such unique properties of nano-ferrites make them suitable for various medical and technological applications like waste water treatment [6], treatment for hyperthermia [7], drug delivery carriers [8], magnetic, humidity and biosensors [9][10], microwave devices, high density data storage devices, magnetic recording media, computer memory chips and high frequency devices [11][12]. Even after several years of their discovery, the unique combination of magnetic and electrical properties, ferrites have drawn much attention to the scientific society and still growing the interest [13].…”