| 초록 |
Cellulose is the most abundant renewable biopolymer on earth. It has many industrial applications, because of its excellent thermal and mechanical properties. Carrageenans are a family of linear sulfated polysaccharides. They have been used in the food and pharmaceutical industries and have been studied as a candidate for the adsorption of cationic dyes. In this work, cellulose/carrageenan composite hydrogel beads were simply prepared by the co-dissolution of cellulose and carrageenan in the mixture of 1-ethyl-3-methylimidazolium acetate and N,N-dimethyl formamide, followed by reconstitution with an anti-solvent. The physical characteristics and adsorption properties for crystal violet (CV) as a model cationic dye of cellulose/carrageenan hydrogel beads were investigated. The adsorption kinetics followed pseudo-second-order and the Langmuir model was the most suitable for the adsorption isotherms. The maximum adsorption capacity for CV was 241 mg/g. The adsorption capacity was enhanced with increasing the pH of dye solution. The thermodynamic parameters indicated that the adsorption of CV onto the cellulose/carrageenan hydrogel beads was spontaneous and exothermic process. |
