Chitosan was prepared and coupled with Furfural. The resulting chitosan furfural Schiff base was characterized using Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Brunauer Emmett Teller (BET) analysis. It was observed that Chitosan furfural Schiff base shows characteristic absorption peaks at 3290.35cm−1„ 1644.47cm−1, 1552.69 cm−1„ which confirms the stretching vibration attributed to OH and NH groups of chitosan, NH=C (Imine linkage) of the Schiff base and aromatic ring of the furfural respectively. The SEM analysis, showed a rough large pore surface, the BET analysis revealed a large surface area of 339.85 m2/g, a pore diameter of 2.94nm, and a pore volume of 0.1194 cm3,/g. The material was used to adsorb aqueous 2, 4- Dinitrophenol (2, 4-DNP). The results obtained were evaluated with Langmuir and Freundlich adsorption isotherm. The material data fitted best with Freundlich isotherm R2 value of 0.9690 when compared to Langmuir isotherm R2 value of 0.8560. This indicates that the material proved uptake onto heterogeneous adsorbent surfaces. The R2 values are regarded as a measure of the best fit of experimental data on the isotherm model.

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I. G. Okunzuwa, O. O. E. Enaroseha, S. I. Okunzuwa, O. S. Ojodale and O. Oyibo “Preparation and Characterization of Chitosan Furfural Schiff Base in the Removal of Aqueous 2, 4- Dinitrophenol,” International Journal of Applied and Physical Sciences, vol. 10, pp. 15-21, 2024. Doi: https://dx.doi.org/10.20469/ijaps.10.50002