Adsorption performance of creatinine on dialdehyde nanofibrillated cellulose derived from potato residues

Abstract

Potato residue is vastly produced in the food industry but it is landfilled. This article describes the treatment of purified cellulose derived from potato residues by a high pressure homogenizer to produce nano-fibrillated cellulose (NFC), which was then oxidized by sodium periodate to prepare dialdehyde nano-fibrillated cellulose (DANFC). The produced NFC and DANFC were characterized by a scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The orthogonal experiment was induced to obtain the maximum degree of oxidation (DO) on DANFC. The results indicated that the optimal conditions were 40°C and pH 3. Alternatively, the isotherm and kinetic studies for the adsorption of creatinine on DANFC with different DOs (70.5 and 88.8%) were investigated, and the experimental results fitted well into Freundlich isotherm model and pseudo second-order kinetic model. The maximum adsorption capacities of DANFCs with the DO of 70.55 and 88.85% were 6.7 and 17.2 mg g(-1) , respectively, which were achieved under the conditions of 37°C and initial creatinine concentration of 100 mg L(-1).

Preparation of dialdehyde cellulose nanocrystal as an adsorbent for creatinine

“…However, the coefficient of determination was close to 1 for the pseudo‐second‐order model, and the calculated q e values were close to those of experimental values presented in Figures –, which showed a close fit of the experimental data to the pseudo‐second‐order kinetic model. These results also suggest that the adsorption might be the rate‐limiting process, and the selection of DCNCs for creatinine removal is a better option than other samples as it has a faster adsorption rate and is smaller. However, other cellulosic materials, e.g.…”