Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Industrial effluents pose environmental challenges due to dye contamination.
• Effective removal of dyes like Acid Blue 92 (AB92) is crucial for water remediation.
• Nanomaterials offer promising solutions for pollutant adsorption.

Purpose of the Study:

• To synthesize and characterize neodymium oxide (Nd2O3) nanoparticles.
• To investigate and optimize the adsorption of Acid Blue 92 (AB92) dye using Nd2O3 nanoparticles.
• To model and understand the adsorption process using response surface methodology (RSM).

Main Methods:

• Synthesis and characterization of Nd2O3 nanoparticles (XRD, FTIR, SEM).
• Adsorption experiments for AB92 dye removal from aqueous solutions.
• Optimization using Central Composite Design (CCD) within Response Surface Methodology (RSM).
• Kinetic, equilibrium, and thermodynamic studies.

Main Results:

• Nd2O3 nanoparticles were successfully synthesized and characterized.
• Optimal adsorption conditions determined: pH 3.15, 138.5 mg/L AB92, 0.83 g/L adsorbent, 50 min contact time.
• Achieved 90.70% AB92 removal under optimal conditions.
• Adsorption followed Langmuir isotherm and pseudo-second-order kinetics; process was spontaneous and favorable with increasing temperature.

Conclusions:

• Nd2O3 nanoparticles are effective adsorbents for AB92 dye removal.
• RSM provided a significant and reliable model for optimizing the adsorption process (R²=0.9596).
• The study demonstrates a viable method for treating dye-contaminated wastewater using nanomaterials.