Green Synthesis of Magnesium Oxide Nanoparticles for Textile Wastewater Remediation

Strategic Insights -

A new research study has explored the green synthesis of magnesium oxide nanoparticles (MgONPs) using Cola acuminata leaf extract, optimized through the Taguchi Design of Experiment to enhance surface area for effective toxic dye removal. The synthesized MgONPs were further surface-activated using phosphoric acid to improve functional moieties for selective removal of crystal violet and methylene blue from textile effluent. The study demonstrated the superior adsorption capacities of the surface-activated MgONPs for CV and MB, with equilibrium data fitted to isotherm and kinetic models. The research highlighted the potential of bio-inspired, surface-modified MgONPs as an efficient and sustainable adsorbent for textile wastewater remediation.

Key Takeaways:

  • The study explored the green synthesis of magnesium oxide nanoparticles (MgONPs) using Cola acuminata leaf extract, with the goal of enhancing surface area for effective toxic dye removal.
  • The synthesized MgONPs were surface-activated using phosphoric acid (MgONPs@HsPOa) to improve functional moieties for selective removal of crystal violet (CV) and methylene blue (MB) from textile effluent.
  • The adsorption performance of MgONPs@HsPOa was evaluated under varying pH, contact time, adsorbent dosage, and temperature conditions, with equilibrium data fitted to isotherm and kinetic models.
  • The study demonstrated superior adsorption capacities for CV (497.50 mg/g) and MB (484.50 mg/g) at the optimal conditions.
  • The adsorption process was found to follow pseudo-second-order kinetics and Langmuir isotherm models, indicating monolayer adsorption on the nanoadsorbent surface.
  • Thermodynamic analysis revealed that the adsorption process was spontaneous and endothermic.
  • Reusability studies confirmed the high stability of MgONPs@HsPOa, maintaining over 85% removal efficiency after ten cycles.
  • The study highlighted the potential of bio-inspired, surface-modified MgONPs as an efficient and sustainable adsorbent for textile wastewater remediation.
  • The research was conducted by Titus Chinedu Egbosiuba and his team at the Missouri University of Science and Technology.

Statistics:

  • Adsorption capacities: CV (497.50 mg/g), MB (484.50 mg/g)
  • Optimized conditions: pH (8), contact time (40 min), adsorbent dosage (25 mg/L), temperature (50°C)
  • Adsorption process: pseudo-second-order kinetics, Langmuir isotherm models
  • Thermodynamic analysis: spontaneous and endothermic
  • Reusability studies: 85% removal efficiency after ten cycles
  • Adsorption costs: 0.16 and 0.15 US$/g for the removal of a unit weight of CV and MB from textile wastewater

Sources:

  • NewsRx. New Findings on Nanoparticles from Missouri University of Science and Technology Summarized (Mechanistic Study of Phosphoric Acid Activated Magnesium Oxide Nanoparticles for the Removal of Crystal Violet and Methylene Blue From Textile ...). Biotech Week. June 11, 2025; p 1062.
  • Mechanistic Study of Phosphoric Acid Activated Magnesium Oxide Nanoparticles for the Removal of Crystal Violet and Methylene Blue From Textile Wastewater. Journal of Environmental Chemical Engineering, 2025;13(3).