2026-04-17T08:07:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1722232026-01-31T10:58:18Zcom_2072_1057col_2072_478916col_2072_478917

00925njm 22002777a 4500 dc Bello Gil, Daniel author Roig Molina, Emma author Fonseca, Jennifer author Sarmiento Ferrández, Mar ıa Dolores author Ferrándiz, Marcela author Franco, Esther author Mira, Elena author Maestro, Beatriz author Sanz, Jesús M. author 2020-11-20T11:28:33Z 2020-11-20T11:28:33Z 2018-09-01 2020-11-11T17:42:01Z The presence of synthetic dyes in wastewaters generated by the textile industry constitutes a serious environmental and health problem that urges the scientific community on an appropriate action. As a proof-of-concept, we have developed a novel approach to design enzymatic bioreactors with the ability to decolorize dye solutions through the immobilization of the bacterial CueO laccase-like multicopper oxidase from Escherichia coli on polyhydroxybutyrate (PHB) beads by making use of the BioF affinity tag. The decolorization efficiency of the system was characterized by a series of parameters, namely maximum enzyme adsorption capacity, pH profile, kinetic constants, substrate range, temperature and bioreactor recycling. Depending on the tested dye, immobilization increased the catalytic activity of CueO by up to 40-fold with respect to the soluble enzyme, reaching decolorization efficiencies of 45-90%. Our results indicate that oxidase bioreactors based on polyhydroxyalkanoates are a promising alternative for the treatment of coloured industrial wastewaters. Aigües residuals Indústria tèxtil Escheríchia coli Sewage Textile industry Escherichia coli An enzymatic system for decolorization of wastewater dyes using immobilized CueO laccase-like multicopper oxidase on poly-3-hydroxybutyrate