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Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as

SUN Min, YOU Yahua, DENG Shengsong, GAO Wenxia, YAO Risheng

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1, Pages 95-98 doi: 10.1007/s11783-007-0018-0

Abstract: AB 90027 as catalyst. The effecting factors during degradation and the degrading mechanism were studied. Also, the location of the enzyme in the cell, which could catalyze the degradation of 4-aminophenol, was analyzed. The results showed that to degrade 50 mL of 4-aminophenol whose concentration was 500 mg/L, the optimal conditions were: volume of HO = 3 mL, temperature = 40 60?C and pH = 9 10. In the degradation process, 4-aminophenol was first converted to benzoquinone and NH, then organic acids including maleic acid, fumaleic acid, and oxalic acid were formed, and then finally CO and HO were generated as final products. The enzyme that could catalyze the degradation of 4-aminophenol was mainly extracellular enzyme.

Keywords： degradation process temperature effecting degradation volume