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With the Fe3O4@MSS(magnetic mesoporous silica spheres)–NH2as the carrier and the glutaraldehyde as crosslinking agent,the immobilized laccase has been prepared and characterized by XRD,IR,SEM and BET etc.Under the optimal conditions,the removal efficiency of2,4-DCP reached 88%and the removal efficiency still remained 61.5%after five cycles of operations.In virtue of GC–MS analysis,2,5-dimethoxyl-1,4-quinone,2-chlorine-1,4-dimethoxyl benzene,3,30-dichlorine-4,40-dimethoxyl biphenyl,maleic acid phenol ester,and three kinds of maleic acid,alcohol ester,and para-hydroxyl phenol ester compounds have been identified as intermediate and final degradation products of 2,4-DCP,respectively.Besides,the degradation products of 2,4-DCP have been confirmed by performing the1H-NMR and13C-NMR experiments,further demonstrating the degradation mechanism of 2,4-DCP by the immobilized laccase.
With the Fe3O4 @ MSS (magnetic mesoporous silica spheres) -NH2as the carrier and the glutaraldehyde as a crosslinking agent, the immobilized laccase has been prepared by characterized by XRD, IR, SEM and BET etc. Unit of optimal conditions, the removal efficiency of 2, 4-DCP reached 88% and the removal efficiency still remained 61.5% after five cycles of operations. Virtue of GC-MS analysis, 2,5-dimethoxyl-1,4-quinone, 2-chlorine- , 3,30-dichlorine-4,40-dimethoxyl biphenyl, maleic acid phenol ester, and three kinds of maleic acid, alcohol ester, and para-hydroxyl phenol ester compounds have been identified as intermediate and final degradation products of 2,4- DCP, respectively. Theseides, the degradation products of 2,4-DCP have been confirmed by performing the1H-NMR and13C-NMR experiments, further demonstrating the degradation mechanism of 2,4-DCP by the immobilized laccase.