Lanthanum-Integrated Porous Adsorbent for Effective Phosphorus Removal

Area of Science:

• Environmental Science
• Materials Science
• Chemistry

Background:

• Phosphate removal is critical for preventing water eutrophication and ensuring ecological sustainability.
• Existing adsorbents often lack the required capacity, selectivity, and long-term stability for effective phosphate treatment.
• Developing advanced materials is essential for efficient wastewater remediation.

Purpose of the Study:

• To design and fabricate novel porous La-based adsorbents for high-performance phosphate removal.
• To investigate the adsorption capacity, kinetics, selectivity, and reusability of the developed adsorbents.
• To establish an integrated material model for designing advanced wastewater treatment structures.

Main Methods:

• Fabrication of La(OH)3 decorated amino-functionalized Caragana korshinskii (CK) nanowires.
• Characterization of the composite adsorbent structure and properties.
• Phosphate adsorption experiments to determine capacity, kinetics, and selectivity in the presence of common anions.
• Regeneration studies to assess long-term stability and reusability.

Main Results:

• An ultrahigh adsorption capacity of 173.3 mg P g⁻¹ was achieved.
• Phosphate adsorption was rapid, completed within 50 minutes.
• The adsorbents demonstrated excellent selectivity and anti-interference against common anions (CO₃²⁻, NO₃⁻, Cl⁻, SO₄²⁻).
• A removal rate of 85% was maintained after four regeneration cycles.

Conclusions:

• The developed porous La-based adsorbents show exceptional efficiency for phosphate removal from water.
• These materials offer a promising solution for wastewater treatment, contributing to sustainable ecology.
• The integrated material design approach provides a model for future advanced adsorbent development.