Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution. (May 2017)

• Record Type: Journal Article
• Authors: Song, Kaili; Xu, Helan; Xu, Lan; Xie, Kongliang; Yang, Yiqi
• Is Part Of: Bioresource technology. Volume 232(2017)
• Page Start: 254
• Page End: 262
• Publication Date: 2017-05
• Subjects: Keratin adsorbent -- Cellulose nanocrystal -- Adsorption -- Dye wastewater treatment; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.01.070
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: CNC reinforced keratin bioadsorbent was developed for dye removal. The adsorption capacities for RB5 and DR80 were 1201 and 1070 mg g −1, respectively. The bioadsorbent could be regenerated easily and simply. The bioadsorbent displayed excellent regeneration and recyclability. Fixed bed column studies verified excellent performance of the bioadsorbent. Abstract: High-efficiency and recyclable three-dimensional bioadsorbents were prepared by incorporating cellulose nanocrystal (CNC) as reinforcements in keratin sponge matrix to remove dyes from aqueous solution. Adsorption performance of dyes by CNC-reinforced keratin bioadsorbent was improved significantly as a result of adding CNC as filler. Batch adsorption results showed that the adsorption capacities for Reactive Black 5 and Direct Red 80 by the bioadsorbent were 1201 and 1070 mg g −1, respectively. The isotherms and kinetics for adsorption of both dyes on bioadsorbent followed the Langmuir isotherm model and pseudo-second order model, respectively. Desorption and regeneration experiments showed that the removal efficiencies of the bioadsorbent for both dyes could remain above 80% at the fifth recycling cycles. Moreover, the bioadsorbent possessed excellent packed-bed column operation performance. Those results suggested that the adsorbent could be considered as a high-performance and promising candidate for dye wastewater treatment.