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Degradation of 4-aminophenol by hydrogen peroxide oxidation using enzyme from Serratia marcescens as catalyst |
| SUN Min1, YOU Yahua1, DENG Shengsong1, GAO Wenxia1, YAO Risheng2 |
| 1.College of Chemistry and Engineering, Hefei University of Technology, Hefei 230009, China; 2.College of Chemistry and Engineering, Hefei University of Technology, Hefei 230009, China; Key Laboratory of Bio-Process of Ministry of Education, Hefei 230009, China; |
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Abstract This paper reports on the degradation of 4-aminophenol using hydrogen peroxide as oxidizer and the enzyme from Serratia marcescens 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 H2O2 = 3 mL, temperature = 40 60?C and pH = 9 10. In the degradation process, 4-aminophenol was first converted to benzoquinone and NH3, then organic acids including maleic acid, fumaleic acid, and oxalic acid were formed, and then finally CO2 and H2O were generated as final products. The enzyme that could catalyze the degradation of 4-aminophenol was mainly extracellular enzyme.
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Issue Date: 05 March 2007
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