New Trend for Acceleration Solid Phase Extraction Process Based on Using Magnetic Nano-adsorbents along with Surface...

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Chemistry

Background:

• Conventional methods for nanoparticle functionalization are time-consuming.
• Efficient removal of heavy metals from water is crucial for environmental protection.

Purpose of the Study:

• To develop a rapid, solvent-free microwave-assisted technique for silica coating and diamine functionalization of iron magnetic nanoparticles (Fe3O4-MNPs).
• To investigate the adsorption capabilities of the modified nanoparticles for copper(II) and iron(III) ions.
• To evaluate the kinetics and efficiency of the solid-phase extraction process.

Main Methods:

• Silica coating of Fe3O4-MNPs using microwave-assisted, solvent-free technique.
• Functionalization of silica-coated nanoparticles with 1,2-ethylenediamine (1,2EDA), 1,5-pentanediamine (1,5PDA), and 1,8-octanediamine (1,8-ODA).
• Characterization using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), and Fourier-Transform Infrared Spectroscopy (FT-IR).
• Adsorption studies for Cu(II) and Fe(III) with kinetic analysis.

Main Results:

• Nanoparticle modification achieved in 60 minutes, significantly faster than conventional methods (>1000 minutes).
• High adsorption capacities for Cu(II) (up to 2.116 mmol g⁻¹) and Fe(III) (up to 5.367 mmol g⁻¹) achieved rapidly (5 seconds equilibration time).
• Pseudo-second order kinetics model effectively describes the metal uptake process.

Conclusions:

• The microwave-assisted technique offers a highly efficient and rapid method for preparing functionalized magnetic nano-adsorbents.
• These nano-adsorbents demonstrate excellent performance in fast solid-phase extraction of heavy metals.
• The study highlights the potential of these materials for environmental remediation applications.