Enhanced phenol degradation in coking wastewater by immobilized laccase on magnetic mesoporous silica nanoparticles in a magnetically stabilized fluidized bed

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• 作者：Feng Wang^a ; Yiru Hu^a ; Chen Guo^a ; ^{cguo@home.ipe.ac.cn} ; Wei Huang^b ; Chun-Zhao Liu^a ; ^{czliu@home.ipe.ac.cn}
• 关键词：Coking wastewater ; Laccase immobilization ; Magnetically stabilized fluidized bed ; Phenol degradation
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：110
• 期：Complete
• 页码：120-124
• 文件大小：327 K

摘要

The immobilized laccase on magnetic mesoporous silica nanoparticles has been developed for efficient phenol degradation. The degradation rate of phenol by the immobilized laccase was 2-fold higher than that of the free laccase, and the immobilized laccase retained 71.3%of its initial degradation ability after 10 successive batch treatments of coking wastewater. The phenol degradation in the coking wastewater was enhanced in a continuous treatment process by the immobilized laccase in a magnetically stabilized fluidized bed (MSFB) because of good mixing and mass transfer. The degradation rate of phenol maintained more than 99%at a flow rate of less than 450 mL h^鈭? and decreased slowly to 91.5%after 40 h of the continuous operation in the MSFB. The present work indicated that the immobilized laccase on magnetic mesoporous supports together with the MSFB provided a promising avenue for the continuous enzymatic degradation of phenolic compounds in industrial wastewater.