Novel, Environment-Friendly Cellulose-Based Derivatives for Tetraconazole Removal from Aqueous Solution
Bayan Khalaf1, Othman Hamed1, Shehdeh Jodeh1
1Department of Chemistry, Faculty of Science, An-Najah National University, P.O. Box 7, Nablus, Palestine.
Polymers
|February 12, 2021
Summary
New cellulose derivatives (Cell-F and Cell-P) effectively remove the pesticide tetraconazole from water. These novel adsorbents demonstrate high removal efficiencies, offering a promising solution for pesticide remediation in aqueous environments.
Area of Science:
- Materials Science
- Environmental Chemistry
- Polymer Chemistry
Background:
- Pesticide contamination of water sources poses significant environmental and health risks.
- Developing efficient and cost-effective adsorbents for pesticide removal is crucial for water purification.
- Cellulose-based materials offer a sustainable and versatile platform for adsorbent development.
Purpose of the Study:
- To synthesize novel cellulose derivatives, Cell-F and Cell-P, incorporating heterocyclic moieties.
- To evaluate the efficacy of these derivatives as adsorbents for removing the pesticide tetraconazole from aqueous solutions.
- To investigate the adsorption mechanism, kinetics, and thermodynamics for tetraconazole removal.
Main Methods:
- Synthesis of cellulose derivatives (Cell-F and Cell-P) via reaction with furan-2-carbonyl chloride and pyridine-2,6-dicarbonyl dichloride.
- Characterization of adsorbents using SEM, TGA, IR, and H1 NMR.
- Optimization of adsorption conditions (contact time, pH, temperature, adsorbent dose, initial concentration).
- Adsorption isotherm (Langmuir, Freundlich) and kinetic (pseudo-first-order, pseudo-second-order, intra-particle diffusion) studies.
- Thermodynamic analysis (∆H, ∆G, ∆S) using Van't Hoff plots.
Main Results:
- Cell-F and Cell-P achieved high tetraconazole removal percentages of 98.51% and 95%, respectively.
- Underivatized nanocellulose showed a removal efficiency of approximately 91.73%.
- Adsorption followed the Langmuir isotherm model and pseudo-second-order kinetic model.
- Negative Gibbs free energy values indicated spontaneous adsorption processes for all adsorbents.
Conclusions:
- Synthesized cellulose derivatives (Cell-F and Cell-P) are highly effective adsorbents for tetraconazole removal.
- These novel materials show potential for large-scale commercial application in pesticide remediation.
- The spontaneous and efficient adsorption highlights the utility of functionalized nanocellulose in environmental cleanup.
