Degradation of Azo Dyes by Cell-free Extract from Aeromonas hydrophila var. 24B

The degradation of several azo dyes by cell-free extract from Aeromonas hydrophila var. 24B has been studied. The compounds 4-dimethylaminoazobenzene, 4-diethylaminoazobenzene, 2′-carboxy-4-dimethylaminoazobenzene, 2′-carboxy-4-diethylaminoazobenzene, 4′-carboxy-4-dimethylaminoazobenzene, and 2′-methoxycarbonyl-4-dimethylaminoazobenzene were appreciably degraded by the cell-free extract. Gas chromatography-mass spectrometry (GCMS) and spectrophotofluorimetry were used to detect the degradation products