Mechanosynthesis of MFe₂O₄ (M = Co, Ni, and Zn) Magnetic Nanoparticles for Pb Removal from Aqueous Solution

Abstract

Adsorption of Pb(II) from aqueous solution using MFe2O4 nanoferrites (M = Co, Ni, and Zn) was studied. Nanoferrite samples were prepared via the mechanochemical method and were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), micro-Raman, and vibrating sample magnetometry (VSM). XRD analysis confirms the formation of pure single phases of cubic ferrites with average crystallite sizes of 23.8, 19.4, and 19.2 nm for CoFe2O4, NiFe2O4, and ZnFe2O4, respectively. Only NiFe2O4 and ZnFe2O4 samples show superparamagnetic behavior at room temperature, whereas CoFe2O4 is ferromagnetic. Kinetics and isotherm adsorption studies for adsorption of Pb(II) were carried out. A pseudo-second-order kinetic describes the sorption behavior. The experimental data of the isotherms were well fitted to the Langmuir isotherm model. The maximum adsorption capacity of Pb(II) on the nanoferrites was found to be 20.58, 17.76, and 9.34 mg·g−1 for M = Co, Ni, and Zn, respectively.

Artificial Neural Network Modeling for Removal of Cd (II) and Pb (II) from Wastewater by Using Three Ferrite Nanomaterial (Cu0.9Zn0.1Fe2O4, Cu0.8Zn0.2Fe2O4, and Cu0.7Zn0.3Fe2O4) and Study the Antimicrobial Effectiveness of these Ferrite Substances

“…The pH of the solution plays an important character in affecting the adsorption properties of Cd (II) and Pb (II) removal by utilizing three nano-magnetic materials (Cu0.9Zn0.1 Fe2O4 (A), Cu0.8Zn0.2 Fe2O4 (B), and Cu0.7Zn0.3 Fe2O4 (C)). The effects of pH on the removal of ions were studied from a range of 3, 7, and 9 under the conditions: The time used 45 min, the adsorbent dosage 0.1 g. Figures 6 and7 demonstrate that the greatest elimination of Cd (II) ions and Pb (II) ions on all three adsorbents occurred at pH 7, When pH values decrease, they increase the concentration of hydrogen ions that contest with the metal ions on the vigorous positions of nano-magnetic materials and reduces the elimination of Cd (II) and Pb (II), and at pH 9 became more basic and the adsorption declines as metal hydroxides precipitate, At pH 7, removal efficiency for cadmium ions was 100% complete removal on adsorbents A and B, and it was 95% on sample C [27,28].This decrease in the adsorption of Cd (II) on Cu0.7Zn0.3 Fe2O4 was due to a decrease in the percentage of Cu concentration and an increase in the proportion of Zn concentration in nano-magnetic materials and the maximum removal of Pb (II) was obtained respectively: on the samples A and B were 78.4% and 78.8%, and 83.4% on sample C was the highest removal of lead ions due to an increased concentration of Zn, this because of the oxidation and reduction reaction that happens between the metal ions and the adsorption surface [8]. It can be seen that ANN outputs were well compatible with the experimental data.…”

“…Ferrite has great attention to removing heavy metal ions from the watery solutions because of its unique physical and chemical properties, ease of preparation, and a large surface area [6,7]. Vazquez-Olmos et al Examined the effectiveness of M Fe2O4 (M = Co, Ni, and Zn) ferrite for adsorbing lead ions from a weary solution [8].…”

ZnFe2O4 and CuFe2O4 Nanocrystals: Synthesis, Characterization, and Bactericidal Application

“…ZnFe 2 O 4 nanoparticles (NPs) significantly contribute to biomedical applications mainly due to their biocompatible nature [8]. Synthesis methods like sol-gel [9], microemulsion [10], precipitation [11], sonochemical synthesis [12], hydrothermal [13], pulsed laser deposition [14], combustion method [15], solid-state [16] and biosynthesis [17] have been used to prepare ZnFe 2 O 4 NPs.…”

Application of Carbonic Nanosheets Based on Urea Precursors as Dispersive Solid Phase Extraction Adsorbent for Extraction of Methamphetamine from Urine Samples

“…V is the urine volume (mL), and M is the adsorbent amount (g). 31 The adsorption capacity is as 0.7 mg/g. The reusability of the GCNNs is studied, covering the optimized conditions ( Figure 3 ).…”

“…Where C0 and Ce are the initial and equilibrium concentrations of methamphetamine in the solution (µg/mL), respectively. V is the urine volume (mL), and M is the adsorbent amount (g) (31). The adsorption capacity is as 0.7 mg/g.…”