Cellulose and its cationic derivative obtained from soybean hull as a tool for the remediation of textile dyes in wastewater: Physicochemical characterization and molecular mechanism interaction

GIORDANO, ENRIQUE D.V.; BOSIO, BÁRBARA; CAMISCIA, PAOLA; PICÓ, GUILLERMO A.; VALETTI, NADIA WOITOVICH

Biocatalysis and Agricultural Biotechnology

Elsevier

Lugar: Amsterdan; Año: 2021 vol. 36

1878-8181

Chemical semi-crystalline cellulose and its derivative functionalized with quaternary ammonium groups were assayed as adsorption beds. These adsorbents were physically characterized by Fourier transform infrared spectroscopy, X-ray diffraction, total surface area determined by nitrogen adsorption and differential scanning calorimetry. Applicability and efficiency of these biosorbers were assayed using Congo Red (CR) as a model textile dye which is an organic pollutant compound. Adsorption of this dye modified the morphology of the cellulose inducing a disorder in its surface. Adsorption capacities of the extracted and the cationized cellulose were 112 and 314 mg/g, respectively, therefore maximum adsorption capacity values (~55 mg/g) and adsorption times (20 ? 90 min) were found to be much higher than the average for many agricultural solid wastes adsorbents for CR. A thermodynamic study showed that the adsorption of Congo Red onto cellulose and its cationic derivative was endothermic in nature with a positive entropic change.