Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6588041 | Chemical Engineering Journal | 2013 | 6 Pages |
Abstract
The degradation, kinetics and biotransformation of Direct Red 80 and chemical oxygen demand (COD) were examined under a sulfate reducing environment. Complete color and sulfate removal with more than 87% COD removal were obtained in the batch experiments at different dye (50-800Â mg/l) and sulfate (100-5000Â mg/l) concentrations. Dye degradation, COD and sulfate removal followed first order kinetics. An increase in dye concentration from 0 to 800Â mg Lâ1 decreased the rate constant (k1) for dye, COD and sulfate removal from 0.0843 to 0.035Â hâ1, 0.019 to 0.009Â hâ1 and 0.108 to 0.075Â hâ1, respectively. In particular, the sulfate concentration had no significant effect on dye degradation. Unlike other anaerobic cultures, the sulfate-reducing bacteria culture showed excellent dye mineralization and desulfonation ability. Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry revealed aniline and 1,4-diamino benzene to be the resulting metabolites after the decolorization of Direct Red 80.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Kashif Rasool, Seung Han Woo, Dae Sung Lee,