INVESTIGADORES
FERREIRA Maria Lujan
artículos
Título:
Efficiency of enzymatic and non-enzymatic catalysts in the synthesis of insoluble polyphenol and conductive polyaniline in water
Autor/es:
NÉSTOR RAÚL CURVETTO; DÉBORA FIGLAS; ADRIANA BRANDOLÍN; SILVANA BEATRIZ SAIDMAN; ELSA HAYDÉE RUEDA; MARÍA LUJÁN FERREIRA
Revista:
BIOCHEMICAL ENGINEERING JOURNAL
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2006 p. 191 - 203
ISSN:
1369-703X
Resumen:
Este trabajo fue aceptado el 23 de noviembre del 2005 y se publicó en el Vol. 29 (2006) The present work analyzes the potential use of white-rot fungi (WRF) and hematin as a low-cost alternative to horseradish peroxidase (HRPC) for phenol and aniline polymerizataion. The objective is to present catalysts for production of tailor-made aniline and to eliminate phenols by precipitation from aqueous solution. 4-aminoantypirine (4AAP) was used to test phenoxide formation by crude protein preparations of white-rot fungi (WRF) at selected conditions. The crude extracts of Pleurotus sajor caju (PSC) was selected because of the results in the phenoxide formation rate. HRPC/H2O2 and Pleurotus sajor-caju (PSC) derived enzymes/H2O2 (PSC/H2O2) systems produced soluble polyaniline in the presence of polystyrene sulphonated (PES), with high aniline conversions at 45 °C. In the absence of hydrogen peroxide, the PSC-derived enzymes produced insoluble polyphenol with similar efficiencies to those found with HRPC or hematin in a first step of treatment (near 40 % conversion of phenol). At least 75% conversion of aniline by PSC enzymes occurred at room temperature. The lignin-modifying enzymes from PSC only produced a conductive form of polyaniline (PANI) after long reaction times at lower temperatures than HRPC. Fungal enzymes look promising for eliminating aniline/phenol by polymerization from wastewaters.