Fabrication of mechanical robust keratin adsorbent by induced molecular network transition and its dye adsorption perfor
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RESEARCH ARTICLE
Fabrication of mechanical robust keratin adsorbent by induced molecular network transition and its dye adsorption performance Weiming Zhu 1 & Xunnan Qian 1 & Haijuan Yu 1 & Xiaoyan Li 2 & Kaili Song 1,3,4 Received: 29 March 2020 / Accepted: 16 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Keratin-based adsorbents showed a great potential in environmental pollution remediation. However, fabrication of keratin adsorbent with an excellent performance remains a challenging issue mainly because of its poor mechanical properties. In this research, mechanical-reinforced keratin adsorbent was designed and engineered at mesoscopic scale by the induced molecular network transition method. It was found that the β-crystallite structure of silk fibroin template could induce the transformation of free unfolded molecular chains of keratin to β-sheet conformation in the keratin adsorbent and further resulted in the controllable manipulation of the mechanical properties of the adsorbent. The prepared keratin adsorbent exhibited an excellent adsorption performance for Reactive Black 5 (RB5). The qe and removal efficiency for RB5 by the adsorbent could reach as high as 550 mg/ g and 95.3%, respectively. The adsorbent exhibited an excellent regeneration and recycle performance due to its mechanical reinforcement. The facile molecular network–induced reconstruction strategy is both straightforward and effective for fabricating mechanical robust adsorbent for environmentally pollutant remediation. Keywords Keratin adsorbent . Molecular network structure . Mechanical property . Dye removal
Introduction Recently, water contamination due to dye effluent discharge is increasing continuously. The global annual yield of dyes has exceeded 8 million tons, which resulted in the random discharge of textile effluents that have rapidly deteriorated the situation of water pollution as well as showed a serious threat to the survival of aquatic and terrestrial organisms (Mahajan
Responsible Editor: Tito Roberto Cadaval Jr * Kaili Song [email protected] 1
Engineering Research Center for Eco-Dyeing and Finishing of Textiles, College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China
2
College of Textile and Garment, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China
3
Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Shaoxing 312000, Zhejiang, China
4
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China
et al. 2019; Abbasi et al. 2020). Currently, due to the huge use and the difficulty of degradation of dyes in the textile industry, particularly reactive dyes, the treatment of dye wastewater has always been a challenging issue (Mahajan et al. 2019; Abbasi et al. 2020). Within the developed technologies, like photodegradation, advanced oxidation, and membrane fil
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