Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution

Kaili Song, Helan Xu, Lan Xu, Kongliang Xie, Yiqi Yang

Research output: Contribution to journalArticle

34 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)254-262
Number of pages9
JournalBioresource Technology
Volume232
DOIs
StatePublished - Jan 1 2017

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Keywords

  • Adsorption
  • Cellulose nanocrystal
  • Dye wastewater treatment
  • Keratin adsorbent

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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