Cyclodextrin Polymer-Loaded Micro-Ceramic Balls for Solid-Phase Extraction of Triazole Pesticides from Water

Area of Science:

• Environmental Chemistry
• Materials Science
• Analytical Chemistry

Background:

• Triazole pesticides pose environmental risks.
• Effective water remediation strategies are crucial.
• Novel adsorbents are needed for pesticide removal.

Purpose of the Study:

• To synthesize and characterize citric acid cross-linked β-cyclodextrin (β-CD) polymer loaded on micro-ceramic balls (P-MCB).
• To evaluate the stability and adsorption performance of P-MCB for triazole pesticides in water.
• To investigate the adsorption kinetics and equilibrium of pesticide removal.

Main Methods:

• Synthesis of β-CD polymer and P-MCB.
• Stability tests across various pH and temperatures.
• Adsorption experiments varying sorbent amount, concentration, and temperature.
• Kinetic and equilibrium modeling (Freundlich equation, second-order kinetics).

Main Results:

• P-MCB exhibited a high adsorption capacity of 15.98 mg/g for flutriafol within 3.5 hours.
• Adsorption equilibrium followed the Freundlich equation, and kinetics followed second-order models for flutriafol and diniconazole.
• P-MCB demonstrated excellent stability and reusability, with an 80.1% recovery rate after 10 cycles and minimal degradation (0.2% ± 0.08).

Conclusions:

• Citric acid cross-linked β-CD polymer on micro-ceramic balls (P-MCB) is a stable and effective adsorbent for triazole pesticides.
• P-MCB offers high adsorption capacity, good reusability, and stability, making it suitable for water remediation.
• The developed P-MCB shows promise for the practical extraction and recycling of triazole pesticides from aqueous environments.