Ce⁴⁺-Substituted Ni-Al mixed oxide: fluoride adsorption performance and reusability.

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Fluoride contamination in water poses significant health risks.
• Developing efficient and sustainable adsorbents for fluoride removal is crucial for water purification.

Purpose of the Study:

• To synthesize and characterize Ce⁴⁺-doped Ni-Al mixed oxides (NACO) for fluoride adsorption.
• To evaluate the adsorption capacity, kinetics, and regeneration potential of NACO.

Main Methods:

• Synthesis of NACO using chemical methods.
• Characterization using TEM, SEM, XRD, XPS, and BET analysis.
• Adsorption studies using isotherm and kinetic models, and regeneration tests.

Main Results:

• NACO exhibited a sheet-like morphology with a cubic crystal structure.
• The maximum adsorption capacity (qmax) was found to be 132 mg g^-1.
• NACO demonstrated excellent regeneration capability, retaining 75.71% efficiency after six cycles.

Conclusions:

• NACO is a highly effective adsorbent for fluoride removal from water.
• The material's reusability and high adsorption capacity make it suitable for sustainable water treatment.
• NACO shows promise for developing advanced water purification technologies.