Laccase immobilization on titania nanoparticles and titania-functionalized membranes
作者： Jingwei Hou , Guangxi Dong , Yun Ye , Vicki Chen
DOI: 10.1016/J.MEMSCI.2013.10.019
关键词:
摘要: Abstract Bio-catalytic degradation of recalcitrant micropollutants with enzymes such as laccase provides an environmentally attractive alternative to the conventional filtration and adsorption processes. However, enzyme loss denaturation remain key challenges for their potential use in water treatment applications. In this work, immobilization on TiO2 nanoparticles blended polyethersulfone (PES) membranes were investigated due TiO2's chemical stability, ease functionalization, architecture. Different surface modification functionalization strategies support materials compared based loading, apparent activity, activity recovery, stability. When coupling agent 3-aminopropyltriethoxysilane (APTES) cross-linker glutaraldehyde (GLU) applied sequentially, effective was achieved 2,2′-azino-bis-(3-ethyl benzothiazoline-6-sulfonic acid) (ABTS) assays. functionalized PES membrane showed better efficiency than non-functionalized membrane. Optimal performance observed containing 4 wt% TiO2, where not only provided sites but also affected morphology hydrophilicity favor immobilization. These bio-catalytic displayed good tolerance wider pH range vigorous conditions required Kinetic study indicated that affinity assay substrate maintained after when packed bed batch reactors.
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