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 Fe3O4@SiO2-NH2

英文题名：Degradation of 2,4-DCP by the Immobilized Laccase on the Carrier of Fe3O4@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]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;[3]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Jiangsu, Peoples R China

年份：2012

卷号：30

期号：12

起止页码：2849

中文期刊名：中国化学（英文版）

外文期刊名：CHINESE JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000312942500022)】；

基金：We are grateful for the 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

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

摘要：In this paper, the laccase immobilized on Fe3O4@SiO2-NH2 nanoparticles was successfully prepared by the glutaraldehyde cross-linking method. The degradations of 2,4-dichlorophenol (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 Fe3O4@SiO2-NH2 carrier by crosslinking with glutaraldehyde, the stability and repetition were improved 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 and 44.12 kJ.mol-1, respectively. The results demonstrate the immobilized laccase had a faster degradation rate than the free laccase; the magnetic carrier Fe3O4@MSS-NH2 can promote the degradation reaction.