Kinetic modelling of phenol co-oxidation using horseradish peroxidase

Bioprocess and Biosystems Engineering
R H CarvalhoJ M S Cabral

Abstract

Phenol is an industrial pollutant and its removal from industrial wastewaters is of great importance. In order to design optimised phenol removal procedures by using horseradish peroxidase-based systems, there are some points that have to be dealt with. One of the most important issues is the need for reliable kinetics as this is one of the difficulties found during process scale-up. Although simplified kinetics can be used for limited ranges of operating conditions, they are not usually reliable for the description of varying process conditions. The present work describes the implementation of a kinetic model, based on a mechanism, for the co-oxidation of phenol and 4-aminoantipyrine (Am-NH2), which is used as a chromogen agent, with hydrogen peroxide as the oxidant. The model covers not only the variation of the concentrations of all the species involved, but also the effect of temperature in the reaction. The estimation of kinetic rate constants and activation energies for the various steps in the mechanism is performed with a single optimisation procedure, and all the experimental results are described using a unique set of parameters, which, thus, is valid over an extended range of operating conditions. The mechanism allow...Continue Reading

References

Oct 18, 1990·Biochimica Et Biophysica Acta·M B ArnaoF García-Cánovas
Jun 12, 1994·Biochimica Et Biophysica Acta·K J BayntonK E Taylor
Apr 25, 1997·Biochimica Et Biophysica Acta·P K PatelD V Behere

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Citations

Jun 22, 2011·Applied Microbiology and Biotechnology·Durda Vasić-RačkiAna Vrsalović Presečki
Feb 27, 2008·Bioprocess and Biosystems Engineering·Mihaela PuiuDumitru Oancea
Aug 4, 2010·Analytica Chimica Acta·Wijitar DungchaiCharles S Henry

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