Decolorization of a Sulfonated Azo Dye, Congo Red, by Staphylococcus sp. EY-3

  • PARK, EUN-HEE (Department of Microbiology, Busan Institute of Health and Environment) ;
  • JANG, MOON-SUN (Faculty of Biotechnology, College of Natural Resources and Life Science, Dong-A University) ;
  • CHA, IN-HO (Department of Microbiology, Busan Institute of Health and Environment) ;
  • CHOI, YONG-LARK (Faculty of Biotechnology, College of Natural Resources and Life Science, Dong-A University) ;
  • CHO, YOUNG-SU (Faculty of Biotechnology, College of Natural Resources and Life Science, Dong-A University) ;
  • KIM, CHEORL-HO (Department of Biochemistry and Molecular Biology, College of Oriental Medicine, Dongguk University) ;
  • LEE, YOUNG-CHOON (Faculty of Biotechnology, College of Natural Resources and Life Science, Dong-A University)
  • Published : 2005.02.01

Abstract

A Staphylococcus sp. EY-3 with the capability of decolorizing Congo Red was isolated from soil at an effluent treatment plant of a textile and dyeing industry. This strain was able to almost completely decolorize a high concentration of Congo Red in 48 h under aerobic conditions. Optimal color removal (more than 96%) was achieved at 30- 40oC, and no noticeable effects of different pH values (5.5- 8.0) on decolorization were observed. This strain also exhibited a remarkable decolorization capability against azo dyes under aerobic conditions, even at a high concentration (dyes 1 g/l) of dye. The metabolic product of Congo Red degradation by this strain was identified by gas chromatography with mass selective detection (GC/MSD) to be an amine derivative benzidine.

Keywords

References

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