title: Hybrid membrane with TiO2 based bio-catalytic nanoparticle suspension system for the degradation of bisphenol-A.
abstract: The removal of micropollutant in wastewater treatment has become a key environmental challenge for many industrialized countries. One approach is to use enzymes such as laccase for the degradation of micropollutants such as bisphenol-A. In this work, laccase was covalently immobilized on APTES modified TiO2 nanoparticles, and the effects of particle modification on the bio-catalytic performance were examined and optimized. These bio-catalytic particles were then suspended in a hybrid membrane reactor for BPA removal with good BPA degradation efficiency observed. Substantial improvement in laccase stability was achieved in the hybrid system compared with free laccase under simulated harsh industrial wastewater treatment conditions (such as a wide range of pH and presence of inhibitors). Kinetic study provided insight of the effect of immobilization on the bio-degradation reaction.
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Hou
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Guangxi
authors.initials: G
authors.lastname: Dong
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Belinda
authors.initials: B
authors.lastname: Luu
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia; RWTH Aachen University, Aachener Verfahrenstechnik, 52056 Aachen, Germany.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Sengpiel
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Yun
authors.initials: Y
authors.lastname: Ye
authors.affiliation: RWTH Aachen University, Aachener Verfahrenstechnik, 52056 Aachen, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Wessling
authors.affiliation: UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia. Electronic address: v.chen@unsw.edu.au.
authors.forename: Vicki
authors.initials: V
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds / Q000302:isolation & purification*; D055162:Biocatalysis / Q000187:drug effects*; D001673:Biodegradation, Environmental / Q000187:drug effects; D019149:Bioreactors; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004800:Enzymes, Immobilized / Q000378:metabolism; D006812:Humic Substances / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D042845:Laccase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D010539:Permeability; D010636:Phenols / Q000302:isolation & purification*; D011437:Propylamines; D059027:Recycling; D012821:Silanes / Q000737:chemistry; D014025:Titanium / Q000494:pharmacology*; D055454:Trametes / Q000201:enzymology; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004791:Enzyme Inhibitors; D004800:Enzymes, Immobilized; D006812:Humic Substances; D042845:Laccase; D008567:Membranes, Artificial; D010636:Phenols; D011437:Propylamines; D012821:Silanes; D014025:Titanium; C009495:titanium dioxide; C477625:amino-propyl-triethoxysilane; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: Bisphenol-A degradation; Hybrid membrane–nanoparticle system; Laccase immobilization; Titanium dioxide