纤维素纳米晶增强角蛋白生物吸附剂用于有效去除水溶液中的染料。
Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution.
机构信息
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.
Department of Textiles, Merchandising and Fashion Design, 234, HECO Building, University of Nebraska-Lincoln, Lincoln, NE 68583-0802, United States.
出版信息
Bioresour Technol. 2017 May;232:254-262. doi: 10.1016/j.biortech.2017.01.070. Epub 2017 Feb 11.
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, 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.
高效且可回收的三维生物吸附剂是通过将纤维素纳米晶体 (CNC) 作为增强剂掺入角蛋白海绵基质中制备的，用于从水溶液中去除染料。由于添加了 CNC 作为填充剂，因此 CNC 增强角蛋白生物吸附剂对染料的吸附性能得到了显著提高。批量吸附结果表明，该生物吸附剂对活性黑 5 和直接红 80 的吸附容量分别为 1201 和 1070mg/g。两种染料在生物吸附剂上的吸附等温线和动力学均遵循朗缪尔等温线模型和拟二级动力学模型。解吸和再生实验表明，在第五次循环回收中，该生物吸附剂对两种染料的去除效率均保持在 80%以上。此外，该生物吸附剂在填充床柱操作中表现出优异的性能。这些结果表明，该吸附剂可被视为处理染料废水的一种高性能、有前景的候选材料。
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