title: Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution.
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 1070mgg-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.
authors.affiliation: Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China; Department of Textiles, Merchandising and Fashion Design, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States.
authors.forename: Kaili
authors.initials: K
authors.lastname: Song
authors.affiliation: Department of Textiles, Merchandising and Fashion Design, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States.
authors.forename: Helan
authors.initials: H
authors.lastname: Xu
authors.affiliation: Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE 68583-0915, United States.
authors.forename: Lan
authors.initials: L
authors.lastname: Xu
authors.affiliation: Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
authors.forename: Kongliang
authors.initials: K
authors.lastname: Xie
authors.affiliation: Department of Textiles, Merchandising and Fashion Design, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States; Department of Biological Systems Engineering, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States; Nebraska Center for Materials and Nanoscience, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States. Electronic address: yyang2@unl.edu.
authors.forename: Yiqi
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000493:pharmacokinetics; D002482:Cellulose / Q000737:chemistry*; D004396:Coloring Agents / Q000493:pharmacokinetics*; D006863:Hydrogen-Ion Concentration; D007633:Keratins / Q000737:chemistry*; D007700:Kinetics; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D009282:Naphthalenesulfonates / Q000493:pharmacokinetics; D062065:Wastewater / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000493:pharmacokinetics*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D001391:Azo Compounds; D002482:Cellulose; D004396:Coloring Agents; D007633:Keratins; D008567:Membranes, Artificial; D009282:Naphthalenesulfonates; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; C009798:C.I. direct red 80; C063421:Remazol black B
keywords: Adsorption; Cellulose nanocrystal; Dye wastewater treatment; Keratin adsorbent