文献类型：期刊文献

中文题名：Degradation of 2,4-DCP by the Immobilized Laccase on the Carrier of Fe304@SiO2-NH2

英文题名：Degradation of 2,4-DCP by the Immobilized Laccase on the Carrier of Fe304@SiO2-NH2

作者：Huan Weiwei[1];Yang Yuxiang[1];Wu Bin[1];Yuan Hongming[2];Zhang Yani[1];Liu Xiangnong[3]

机构：[1]School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, China;[2]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, Jilin 130012, China;[3]Analysis Test Center, Yangzhou University, Yangzhou, Jiangsu 225009, China

年份：2012

卷号：30

期号：12

起止页码：2849

中文期刊名：Chinese Journal of Chemistry

外文期刊名：中国化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

基金：support from the National Natural Science Foundation of China （Grant No. 20971043 and No. 20577010）, the Open Project Program of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University.

语种：英文

中文关键词：Fe3O4@SiO2-NH2 nanoparticles; immobilized laccase; degradation rate; repetition; magneto-inducedeffect

外文关键词：Fe3O4@SiO2-NH2 nanoparticles; immobilized laccase; degradation rate; repetition; magneto-inducedeffect

摘要：In this paper, the laccase immobilized on Fe304@SiO2-NH2 nanoparticles was successfully prepared by the glutaraldehyde cross-linking method. The degradations of 2,4-diehlorophenol （2,4-DCP） catalyzed by laccase and immobilized laccase were carried out. The optimal conditions regarding degradation efficiency were also discussed, which include reaction time, pH value, temperature, concentration of 2,4-DCP and laccase. When laccase was immobilized on Fe304@SiO2-NH2 carrier by crosslinking with glutaraldehyde, the stability and repetition were im- proved significantly. The removal efficiency of 2,4-DCP by immobilized laccase still remained over 59% after six cycles of operation. Degradation of 2,4-DCP is a first-order reaction and the activation energies of 2,4-DCP catalyzed by laccase and immobilized laccase are 51.93 kJ·mol-1 strate the immobilized laccase had a faster degradation Fe304@MSS-NH2 can promote the degradation reaction. and 44.12 kJ·mol-1, respectively. The results demonrate than the free laccase; the magnetic carrier
In this paper, the laccase immobilized on Fe304@SiO2-NH2 nanoparticles was successfully prepared by the glutaraldehyde cross-linking method. The degradations of 2,4-diehlorophenol （2,4-DCP） catalyzed by laccase and immobilized laccase were carried out. The optimal conditions regarding degradation efficiency were also discussed, which include reaction time, pH value, temperature, concentration of 2,4-DCP and laccase. When laccase was immobilized on Fe304@SiO2-NH2 carrier by crosslinking with glutaraldehyde, the stability and repetition were im- proved significantly. The removal efficiency of 2,4-DCP by immobilized laccase still remained over 59% after six cycles of operation. Degradation of 2,4-DCP is a first-order reaction and the activation energies of 2,4-DCP catalyzed by laccase and immobilized laccase are 51.93 kJ·mol-1 strate the immobilized laccase had a faster degradation Fe304@MSS-NH2 can promote the degradation reaction. and 44.12 kJ·mol-1, respectively. The results demonrate than the free laccase; the magnetic carrier