文献类型：期刊文献

英文题名：Laccase Immobilized on Mesoporous SiO2 and Its Use for Degradation of Chlorophenol Pesticides

作者：Yang, Yuxiang[1];Xu, Yong[1];Yang, Yiwen[1];Yang, Huan[1];Yuan, Hongmin[2];Huang, Yan[1];Liu, Xiangnong[3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China;[3]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Jiangsu, Peoples R China

年份：2016

卷号：90

期号：10

起止页码：2044

外文期刊名：RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A

收录：;EI(收录号：20163802830531);WOS:【SCI-EXPANDED(收录号:WOS:000385284800022)】；

语种：英文

外文关键词：mesoporous silica; modification; immobilized laccase; catalyst degradation; 2,4-dichlorophenol

摘要：In this paper, mesoporous silica with large specific surface area was used to immobilize laccase by the glutaraldehyde cross-linking method, and after screening and optimization experiments, the best enzyme immobilization process conditions were found ( 25 degrees C, pH 5.4, 4% glutaraldehyde and 0.2 g/L laccase, treatment time 6 h). After that, the removal and degradation ratio of 2,4-dichlorophenol ( abbreviated as DCP) under different conditions were also studied. After the degradation process was performed for 6 h at 30 degrees C, pH 5.4, and DCP initial concentration of 50 mg/L in the presence of 0.1 g of immobilized laccase, the removal ratio and the degradation ratio were 42.28 and 15.93%, respectively. Compared with free laccase, the reusability of immobilized laccase is significantly improved.