其他摘要：With soybean peroxidase (SPO) solution, the effects of pH on the decoloration of Orange II and Orange G solutions in the presence of the activator were examined. Decoloration rate constants of Orange II and Orange G were maximum at pH 9. The reactivity of the activators p-iodophenol and p- coumaric acid was compared in the decoloration reaction of Orange II and Orange G solutions. The better activator was p-coumaric acid because the decoloration rate was higher when p- coumaric acid was used as the activator. The decolorization reaction of Orange II using SPO immobilized PET proceeded even in the third repeated reaction, but almost no decolorization occurred in the case of Orange G. When the decolorization reaction of three kinds of mixed dye solutions using SPO immobilized PET was performed, it was clarified that dyes having different chemical structures and oxidation potentials could be decolorized simultaneously in the presence of p- coumaric acid.
