Preparation and Characterization of Highly Porous Cellulose Nanofibrils/Chitosan Aerogel for Acid Blue 93 Adsorption: Kinetics, Isotherms, and Thermodynamics Analysis

Abstract

A novel biobased and highly porous aerogel was fabricated by cross-linking between chitosan (CS) and cellulose nanofibrils (CNFs). The structural and chemical characteristics of the produced CS/CNF aerogel were investigated using several techniques and the adsorption potential of the CS/CNF aerogel was determined by adsorption of acid blue 93 dye (AB93) under different conditions and the isotherm, kinetic, and thermodynamic characteristics of AB93 dye adsorption were analyzed. The investigations showed that the CS/CNF aerogel with a highly connected porous structure and large specific surface area has been successfully fabricated. The isotherm study indicated that the absorption of AB93 with the CS/CNF aerogel obeyed the Langmuir adsorption isotherm with a maximum uptake capacity of 1428.7 (mg g −1 ) at 308 K, which was higher than those reported recently for various absorbents. Overall results of adsorption indicated that the CS/CNF aerogel was a promising material for rapid and efficient adsorption of anionic dyes.

Impact of functional spray coatings on smoke volatile phenol compounds and Pinot noir grape growth

“…For guaiacol (Figure 2a), CNF and CNF‐CD films showed the highest absorbance peaks, indicating that guaiacol adsorbed and/or absorbed to films were readily extracted from the films in comparison to CNF‐CH and CNF‐CDCH films. This result may be explained by the porous structure and high surface area in CNF which could increase the adsorption or absorption capability of guaiacol to CNF (Esmaeili et al., 2021). This result may also indicate the undesirable behavior of CNF and CNF‐CD films to mitigate smoke compounds because the free smoke compounds could easily be released into the wine during processing.…”

Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

“…Indeed, in the current scenario of environmental remediation, the purification of air and wastewater is still a challenge. Specifically, aerogels have been successfully used to remove various categories of pollutants, such as pharmaceuticals [ 8 , 20 , 21 ], dyes [ 22 , 23 ], oils and solvents [ 24 , 25 , 26 ], heavy metals, and radioactive elements [ 27 , 28 , 29 ]. The presence of these organic compounds in water and air—even in small quantities—poses a severe danger to all living organisms and the environment.…”

Unlocking the Potential of Polymeric Aerogels from Food and Agricultural Waste for Sustainable CO2 Capture

“…Notably, these bands for the aerogels were less intense and, in some cases, broader relative to those of the precursors. The chitosan samples’ characteristic O–H and N–H stretching vibration intensities were abated due to intermolecular hydrogen bonding between the O–H and N–H groups of the chitosan and cellulose molecular chains. , …”

“…Adsorbent-based technologies, which use solid materials for CO 2 capture, have emerged as an attractive alternative. − Biomass waste materials, such as cellulose − and chitosan − derived from plant cell walls and crustacean shells, respectively, possess functional groups that can effectively interact with CO 2 molecules. Thus, they can provide an eco-friendly and sustainable approach to CO 2 capture, mitigating greenhouse gas emissions and combating global climate change. , …”