Dye Decoloration with Crude Peroxidase Extracted from Inedible Soybean Residue
2019 Volume 70 Issue 6 Pages 339-345
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2019 Volume 70 Issue 6 Pages 339-345
Dye decoloration with crude soybean peroxidase (SPO) extracted from inedible soybean residue was examined. The effect of pH on the decoloration rate of Orange I, Orange II, and Orange G was investigated. The results revealed that the maximum decoloration rate constant of Orange I was pH7.0, whereas the decoloration reaction of Orange II and Orange G fell in the range of pH4.0–11.0.
The decoloration of Orange I with crude SPO in the presence of an activator was examined. p-Coumaric acid was most effective for enhancing the decoloration rate of Orange I, and the optimum p-coumaric acid concentration was 5.0×10－5 M.
Finally, the transfer of dissolved Orange I to nylon fabric was examined at pH7.0 and 20℃ with SPO and hydrogen peroxide in the presence of p-coumaric acid. The color difference of undyed nylon fabric treated with SPO was lower than that treated with sodium percarbonate (pH11.5, 20℃). Therefore, crude SPO was more effective than sodium percarbonate for inhibiting migration.
