Optimization of laccase catalyzed degradation of reactive textile dyes in supercritical carbon dioxide medium by response surface methodology
authors Cristovao, RO; Amaral, PFF; Tavares, APM; Coelho, MAZ; Cammarota, MC; Loureiro, JM; Boaventura, RAR; Macedo, EA; Pessoa, FLP
nationality International
journal REACTION KINETICS MECHANISMS AND CATALYSIS
author keywords Supercritical carbon dioxide; Biocatalysis; Optimization; Reactive dyes; Commercial laccase; RSM
keywords ENZYMATIC-SYNTHESIS; TRAMETES-VERSICOLOR; MEDIATOR SYSTEM; WASTE-WATER; FLUID; DECOLOURIZATION; BIOCATALYSIS
abstract In this work, the laccase catalyzed degradation of reactive textile dyes was studied in supercritical carbon dioxide media. A two level Box- Behnken factorial design with two factors and response surface methodology (RSM) were performed to investigate and optimize the effects of pressure and temperature on reactive red 239 (RR239), reactive yellow 15 (RY15) and reactive black 5 (RB5) dye degradations by commercial laccase in supercritical carbon dioxide media. Mathematical models were developed for each dye showing the effect of each factor and their interactions on color removal. Pressure and the interaction between temperature and pressure were the main factors affecting the decolorization. The optimum conditions for RB5 and RY15 were found to be high pressure values (>120 bar), whilst the temperature presented a minor effect on their degradation at these pressures. For RR239, both variables influenced the decolorization and the optimum conditions appear to be at low values of pressure and high values of temperature.
publisher SPRINGER
issn 1878-5190
year published 2010
volume 99
issue 2
beginning page 311
ending page 323
digital object identifier (doi) 10.1007/s11144-009-0139-5
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000277581700006
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