A significant enhancement in the catalytic performance due to enzymes immobilization is a great way to enhance the economics of biocatalytic processes. The soybean peroxidase (SP) immobilization under ferroxyte and the ferulic acid removal by the enzyme free and immobilized were investigated. The immobilization via silica-coated ferroxyte nanoparticles was effective, and immobilization yield of 39%. The scanning electron microscopy (SEM) images showed significant changes in the materials morphology. Substantial differences were observed in the particles' Fourier Transform Infrared (FTIR) spectra. The magnetic catalyst revealed a better performance than the free enzyme in the ferulic acid conversion, presenting a good V max/K m ratio when compared with the free enzyme. The reuse evaluated by ten cycles exhibited excellent recycling, remaining constant between the sixth and seventh cycles. The use of magnetic nanocatalyst becomes possible to eliminate the high operational costs, and complicated steps of the conventional enzymatic processes. Thus, a viable industrial route for the use of the enzyme as catalyst is possible.

Department of Chemistry Engineering Federal University of São Carlos 13565 905 São Carlos SP Brazil

Department of Chemistry Federal University of Lavras N° 37 37200 000 Lavras MG Brazil

Department of Chemistry Federal University of Lavras N° 37 37200 000 Lavras MG Brazil Center for Basic and Applied Research Faculty of Informatics and Management University of Hradec Kralove Hradec Kralove Czech Republic

Department of Chemistry Federal University of Lavras N° 37 37200 000 Lavras MG Brazil Department of Chemistry Federal University of Minas Gerais 31270 901 Belo Horizonte MG Brazil

Department of Chemistry Federal University of Ouro Preto 35400 000 Ouro Preto MG Brazil

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