期刊
BIORESOURCE TECHNOLOGY
卷 232, 期 -, 页码 254-262出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.01.070
关键词
Keratin adsorbent; Cellulose nanocrystal; Adsorption; Dye wastewater treatment
资金
- USDA-National Institute of Food and Agriculture [S1054 (NEB 37-037)]
- USDA Hatch Act
- Agricultural Research Division at the University of Nebraska-Lincoln
- China Scholarship Council
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. (C) 2017 Elsevier Ltd. All rights reserved.
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