Novel, Environment-Friendly Cellulose-Based Derivatives for Tetraconazole Removal from Aqueous Solution

Abstract

In this study, cellulose-based derivatives with heterocyclic moieties were synthesized by reacting cellulose with furan-2-carbonyl chloride (Cell-F) and pyridine-2,6-dicarbonyl dichloride (Cell-P). The derivatives were evaluated as adsorbents for the pesticide tetraconazole from aqueous solution. The prepared adsorbents were characterized by SEM, TGA, IR, and H1 NMR instruments. To maximize the adsorption efficiency of tetraconazole, the optimum conditions of contact time, pH, temperature, adsorbent dose, and initial concentration of adsorbate were determined. The highest removal percentage of tetraconazole from water was 98.51% and 95% using Cell-F and Cell-P, respectively. Underivatized nanocellulose was also evaluated as an adsorbent for tetraconazole for comparison purpose, and it showed a removal efficiency of about 91.73%. The best equilibrium adsorption isotherm model of each process was investigated based on the experimental and calculated R2 values of Freundlich and Langmuir models. The adsorption kinetics were also investigated using pseudo-first-order, pseudo-second-order, and intra-particle-diffusion adsorption kinetic models. The Van’t Hoff plot was also studied for each adsorption to determine the changes in adsorption enthalpy (∆H), Gibbs free energy (∆G), and entropy (∆S). The obtained results showed that adsorption by Cell-F and Cell-P follow the Langmuir adsorption isotherm and the mechanism follows the pseudo-second-order kinetic adsorption model. The obtained negative values of the thermodynamic parameter ∆G (−4.693, −4.792, −5.549 kJ) for nanocellulose, Cell-F, and Cell-P, respectively, indicate a spontaneous adsorption process. Cell-F and Cell-P could be promising absorbents on a commercial scale for tetraconazole and other pesticides.

Cellulose-Based Hectocycle Nanopolymers: Synthesis, Molecular Docking and Adsorption of Difenoconazole from Aqueous Medium

“…Cellulose crosslinking with 2,6-pyridine di-carbonyl dichloride and acylation of cellulose carried in DMAc/LiCl solvent mixture are shown in Figure 1 . These chemical reagents were chosen because of their functional groups in which the presence of the aromatic heterocyclic and the carbonyl and chloride groups make them perfect adsorbents for difenoconazole removal from water, such that these functional groups bind difenoconazole pesticide through various physical interactions including dipole–dipole interaction, H-bonding and π–π stacking [ 30 ].…”

Eco-Friendly Synthesis and Characterization of Double-Crossed Link 3D Graphene Oxide Functionalized With Chitosan for Adsorption of Sulfamethazine From Aqueous Solution: Experimental and DFT Calculations

“…Under nitrogen gas and mixing 0.3 g of EDC with 0.4 g of NHS in the solution for 20 min, the suspension solution was sonicated and agitated for more than 20 h. At this point, a 0.2micron nylon microporous membrane was used to filter the solution, and then washed with a 0.1 M acetic acid solution to eliminate some of the CS residues. The obtained solid was redispersed and dialyzed with DW at room temperature for 3 days (Khalaf et al, 2021b). We employed glutaraldehyde doublecrosslinking and then hydrothermal with EDA working in both chitosan functionalization and cross-linking to establish the double-cross-linked chitosan-functionalized 3D graphene structures.…”

Cellulose based pH-sensitive hydrogel for highly efficient dye removal in water treatment: kinetic, thermodynamic, theoretical and computational studies

“…The electrostatic interactions (between MB+ and O-) and Pi-cations (between aromatic rings and MB+) led to 32 the formation of the major molecular clusters. On the other hand, the Pi-Pi interactions (between phenyl groups themselves and between Phenyl groups and carbonyl oxygen) and the Pi-cation interactions (between delocalized MB+ and carboxylic conjugate groups) sustain sub structural clusters (Khalaf, Hamed et al 2021).…”