首页|Immobilization of laccase on magnetic PEGDA-CS inverse opal hydrogel for enhancement of bisphenol A degradation in aqueous solution
Immobilization of laccase on magnetic PEGDA-CS inverse opal hydrogel for enhancement of bisphenol A degradation in aqueous solution
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Immobilization of laccase on magnetic PEGDA-CS inverse opal hydrogel for enhancement of bisphenol A degradation in aqueous solution
Endocrine disruptors such as bisphenol A(BPA)adversely affect the environment and hu-man health.Laccases are used for the efficient biodegradation of various persistent or-ganic pollutants in an environmentally safe manner.However,the direct application of free laccases is generally hindered by short enzyme lifetimes,non-reusability,and the high cost of a single use.In this study,laccases were immobilized on a novel magnetic three-dimensional poly(ethylene glycol)diacrylate(PEGDA)-chitosan(CS)inverse opal hydrogel(LAC@MPEGDA@CS@IOH).The immobilized laccase showed significant improvement in the BPA degradation performance and superior storage stability compared with the free lac-case.91.1％of 100 mg/L BPA was removed by the LAC@MPEGDA@CS@IOH in 3 hr,whereas only 50.6％of BPA was removed by the same amount of the free laccase.Compared with the laccase,the outstanding BPA degradation efficiency of the LAC@MPEGDA@CS@IOH was maintained over a wider range of pH values and temperatures.Moreover,its relative activity of was maintained at 70.4％after 10 cycles,and the system performed well in actual water matrices.This efficient method for preparing immobilized laccases is simple and green,and it can be used to further develop ecofriendly biocatalysts to remove organic pollutants from wastewater.
Bisphenol A removalLaccase immobilizationChitosanInverse opal hydrogel
Mei Du、Jingzhang Liu、Qiong Wang、Fengbang Wang、Lei Bi、Chunyan Ma、Maoyong Song、Guibin Jiang
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Key Laboratory of Environmental Nanotechnology and Health Effects,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China
University of Chinese Academy of Sciences,Beijing 100049,China
State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Science,Beijing 100085,China
Bisphenol A removal Laccase immobilization Chitosan Inverse opal hydrogel
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