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dos Santos PM, Baruque JR, de Souza Lira RK, Leite SGF, do Nascimento RP, Borges CP, Wojcieszak R, Itabaiana I. Corn Cob as a Green Support for Laccase Immobilization-Application on Decolorization of Remazol Brilliant Blue R. Int J Mol Sci 2022; 23:ijms23169363. [PMID: 36012620 PMCID: PMC9409158 DOI: 10.3390/ijms23169363] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/14/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022] Open
Abstract
The high demand for food and energy imposed by the increased life expectancy of the population has driven agricultural activity, which is reflected in the larger quantities of agro-industrial waste generated, and requires new forms of use. Brazil has the greatest biodiversity in the world, where corn is one of the main agricultural genres, and where over 40% of the waste generated is from cobs without an efficient destination. With the aim of the valorization of these residues, we proposed to study the immobilization of laccase from Aspergillus spp. (LAsp) in residual corn cob and its application in the degradation of Remazol Brilliant Blue R (RBBR) dye. The highest yields in immobilized protein (75%) and residual activity (40%) were obtained at pH 7.0 and an enzyme concentration of 0.1 g.mL−1, whose expressed enzyme activity was 1854 U.kg−1. At a temperature of 60 °C, more than 90% of the initial activity present in the immobilized biocatalyst was maintained. The immobilized enzyme showed higher efficiency in the degradation (64%) of RBBR dye in 48 h, with improvement in the process in 72 h (75%). The new biocatalyst showed operational efficiency during three cycles, and a higher degradation rate than the free enzyme, making it a competitive biocatalyst and amenable to industrial applications.
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Affiliation(s)
- Priscila M. dos Santos
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Julia R. Baruque
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Regiane K. de Souza Lira
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Selma G. F. Leite
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Rodrigo P. do Nascimento
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
| | - Cristiano P. Borges
- COPPE/Chemical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro 21941-972, Brazil
| | - Robert Wojcieszak
- CNRS, Centrale Lille, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, University Lille, University Artois, F-59000 Lille, France
| | - Ivaldo Itabaiana
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
- CNRS, Centrale Lille, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, University Lille, University Artois, F-59000 Lille, France
- Correspondence: ; Tel.: +55-2139-387-580
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