title: Enhanced performance of immobilized laccase in electrospun fibrous membranes by carbon nanotubes modification and its application for bisphenol A removal from water.
abstract: Multi-walled carbon nanotubes (MWCNTs) were used as modified materials to improve the performance of laccase-carrying electrospun fibrous membranes (LCEFMs). The MWCNTs modified LCEFMs (MWCNTs-LCEFMs) were successfully fabricated via emulsion electrospinning, with active laccase and MWCNTs encapsulated inside the fibers. After modified by an optimal amount (1.5wt%, vs. polymer) of MWCNTs, the obtained MWCNTs-LCEFMs showed not only higher activity recovery (85.3%, vs. free laccase) than LCEFMs (71.2%), but also better storage and operational stability, which were mainly attributed to the promoted electron transfer in laccase-catalytic reaction. Furthermore, the specific surface area and tensile strength of MWCNTs-LCEFMs have also been enhanced nearly 2 and 3 times than those of LCEFMs, respectively. The MWCNTs-LCEFMs were applied to remove the widespread bisphenol A from water, where their removal efficiency reached above 90%, with the degradation efficiency accounting for over 80%, and their adsorption efficiency increased about 45% than that of LCEFMs. In addition, the endurances of MWCNTs-LCEFMs to environmental factors such as pH and temperature were also improved.
authors.affiliation: School of Water Resources and Environment, School of Scientific Research, China University of Geosciences (Beijing), 100083, Beijing, PR China; Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, 100012, Beijing, PR China. Electronic address: daiyr@cugb.edu.cn.
authors.forename: Yunrong
authors.initials: Y
authors.lastname: Dai
authors.affiliation: School of Water Resources and Environment, School of Scientific Research, China University of Geosciences (Beijing), 100083, Beijing, PR China. Electronic address: yaojun@cugb.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Yao
authors.affiliation: Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, 100012, Beijing, PR China. Electronic address: songyhcraes@gmail.com.
authors.forename: Yonghui
authors.initials: Y
authors.lastname: Song
authors.affiliation: Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, 100012, Beijing, PR China. Electronic address: liuxl@craes.org.cn.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, 100012, Beijing, PR China. Electronic address: wangsy@craes.org.cn.
authors.forename: Siyu
authors.initials: S
authors.lastname: Wang
authors.affiliation: Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, 100012, Beijing, PR China. Electronic address: yhzmlyy90311@126.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Yuan
mesh_terms: D001559:Benzhydryl Compounds / Q000032:analysis*; D004553:Electric Conductivity; D004655:Emulsions; D004800:Enzymes, Immobilized / Q000737:chemistry*; D042845:Laccase / Q000737:chemistry*; D008567:Membranes, Artificial; D008962:Models, Theoretical; D057139:Nanofibers / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D013718:Tensile Strength; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004655:Emulsions; D004800:Enzymes, Immobilized; D042845:Laccase; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: Adsorption; Bisphenol A; Degradation; Laccase-carrying electrospun fibrous membranes; Multi-walled carbon nanotubes