Facile Synthesis and Characterization of Manganese Ferrite Nanoparticles for the Successful Removal of Safranine T Dye from Aqueous Solutions

Abstract

Safranine T dye causes health problems such as skin and respiratory irritations. Hence, the safranine T dye was efficiently removed from aqueous media employing a simply synthesized manganese ferrite (MnFe2O4) nanoadsorbent. The synthesis of manganese ferrite nanoparticles was carried out by the pechini sol–gel approach using tartaric acid to serve as a chelating agent in addition to 1,2-propanediol to serve as a crosslinker. The TEM analysis showed that the shape of MnFe2O4 nanoparticles is semi-spherical, with an average particle size of 19.32 nm that coincides well with that measured from the XRD (18.89 nm). Further, the several factors that influenced the removal process of safranine T dye were examined, such as time, dye concentration, pH, and temperature. The ideal experimental conditions that achieved the highest safranine T dye removal percentage are pH 8, 80 min, and 298 K. The maximum adsorption capacity of MnFe2O4 nanoparticles towards safranine T dye equals 334.45 mg/g. The removal process of safranine T dye by manganese ferrite nanoparticles was chemical, exothermic, and well defined through the Langmuir equilibrium sorption isotherm in addition to the pseudo-second-order model. The synthesized manganese ferrite nanoparticles have the ability to be reused many times without losing their efficiency.

Functionalization of Strontium Ferrite Nanoparticles with Novel Chitosan–Schiff Base Ligand for Efficient Removal of Pb(II) Ions from Aqueous Media

“…These composites were then calcined at 1000 • C to remove the organic moiety and produce the SrFe 12 O 19 nanoparticles. This step-by-step process aligned with established protocols found in similar studies on the Pechini sol-gel method [27,28].…”

Functionalization of Na2Ca2Si3O9/Ca8Si5O18 Nanostructures with Chitosan and Terephthalaldehyde Crosslinked Chitosan for Effective Elimination of Pb(II) Ions from Aqueous Media

“…Figure 8A,B displays the application of the pseudo-second-order (Equation ( 3)) and pseudo-first-order (Equation (4)) kinetic models for evaluating the adsorption mechanism of Pb(II) ions onto the surface of the fabricated adsorbents [34,35].…”

“…Figure 8A,B displays the application of the pseudo-second-order (Equation ( 3)) and pseudo-first-order (Equation (4)) kinetic models for evaluating the adsorption mechanism of Pb(II) ions onto the surface of the fabricated adsorbents [34,35]. Q e represents the removal capability of the fabricated samples at equilibrium (mg/g), while Q t signifies the removal capability of the fabricated samples at contact time t (mg/g).…”

“…In evaluating viability, the assessment encompasses the analysis of thermodynamic constants, including entropy change (∆S), enthalpy change (∆H), and free energy (∆G). These parameters, along with the distribution coefficient (Kd) at four different temperatures, are computed employing Equations ( 5)-( 7) [34,35]. In evaluating viability, the assessment encompasses the analysis of thermodynamic constants, including entropy change (∆S), enthalpy change (∆H), and free energy (∆G).…”

“…In evaluating viability, the assessment encompasses the analysis of thermodynamic constants, including entropy change (∆S), enthalpy change (∆H), and free energy (∆G). These parameters, along with the distribution coefficient (K d ) at four different temperatures, are computed employing Equations ( 5)-( 7) [34,35].…”