Adsorbents for removal of cationic dye: nanocellulose reinforced biopolymer composites

Reusable and eco-friendly poly(vinyl alcohol)/chitin/nanocellulose based biopolymer composite films were synthesized and characterized. Maleic acid (MA) was used as a crosslinker of the biopolymer composite film. The effect of constituent materials of the biopolymer composite film and the pH on remo...

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Bibliographic Details
Published in:Journal of polymer research 2020-12, Vol.27 (12), Article 373
Main Authors: Mok, Chun Fah, Ching, Yern Chee, Osman, Noor Azuan Abu, Muhamad, Farina, Hai, Nguyen Dai, Choo, J. H., Hassan, C. Rosmani
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Biopolymers
Cationic dyes
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Chitin
Exothermic reactions
Fourier transforms
Industrial Chemistry/Chemical Engineering
Infrared analysis
Maleic acid
Methylene blue
Original Paper
Polymer matrix composites
Polymer Sciences
Polyvinyl alcohol
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Summary:Reusable and eco-friendly poly(vinyl alcohol)/chitin/nanocellulose based biopolymer composite films were synthesized and characterized. Maleic acid (MA) was used as a crosslinker of the biopolymer composite film. The effect of constituent materials of the biopolymer composite film and the pH on removal of methylene blue (MB) dye from aqueous testing solution were studied by batch adsorption studies. The successful deposition of MB dye onto the adsorbent (biopolymer composite film) was confirmed using Fourier transform infrared spectroscopy (FTIR) analysis. Adsorption isotherm studies were fitted to the Freundlich model with the maximum adsorption capacity amounted to 467.5 mg/g. The adsorption kinetics were in conformance to the pseudo-second order model ( R 2  = 0.9924–0.9987). The point zero charge (pH pzc ) of the adsorbents were investigated by pH drift method where the MA cross-linked adsorbents showed pH pzc values in the range of 8.05–8.55. Moreover, the best adsorption performance was observed in sample PVA/CT10/NCC/MA30, with calculated maximum adsorption capacity amounted to 467.5 mg/g. Thermodynamic studies showed that the adsorption were spontaneous, exothermic and less-ordered reactions. High adsorption reusability was determined for PVA/CT10/NCC/MA30 composite, with adsorption percentage of 83.67 ± 1.08% at the fifth cycle. All these positive results implied the potential application of PVA/Chitin/NCC composites for the MB dye’s adsorption from aqueous testing solution.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-020-02347-3