NDLI: An environmentally-friendly enzyme-based nanofibrous membrane for 3,3′,5,5′-tetrabromobisphenol removal

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Fengting Zhang, Bingru Tang, Rongzhi Liu, Sijia Xu, Ran
Copyright Year	2015
Abstract	Chitosan (CS)/poly(vinyl alcohol) (PVA) nanofibrous membranes have inherently poor mechanical strength. To improve the mechanical strength of these membranes, nanocrystalline cellulose (NCC) prepared by a simplified method was added to the former system. The results showed that the tensile strength of the membrane with 5% NCC addition was 370% higher than that of the membrane without NCC. Horseradish peroxidase (HRP) was immobilized on the membrane through covalent binding with HRP previously activated with 1,1′-carbonyldiimidazole, and the maximum enzyme loading was approximately 384 mg g−1. The physical, chemical properties of immobilized HRP and its application in 3,3′,5,5′-tetrabromobisphenol (TBBPA) removal were examined. The results showed that HRP immobilized on CS/PVA–NCC membranes showed greater stability and reusability than free HRP and the membrane without NCC. The former also exhibited an effective performance (95.9% removal, 3 h) for TBBPA removal under the optimum conditions (pH 7, 35 °C). The results showed that HRP immobilized on NCC-incorporated CS/PVA membranes could be used to remove brominated flame-retardants, especially TBBPA from wastewater. Thus, these membranes have potential industrial applications.
Starting Page	64091
Ending Page	64097
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	79
Journal	RSC Advances
DOI	10.1039/c5ra09090c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Vinyl alcohol Enzyme HRP Cellulose Ultimate tensile strength Horseradish peroxidase Covalent bond Carbonyldiimidazole Chitosan Wastewater NCC
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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