Use of multivariate experimental designs for optimizing the reductive degradation of an azo dye in the presence of redox mediators

Química Nova

Diego R. S. Lima¹  Bruno E. L. Baeta¹  Gilmare A. Da Silva¹  Silvana Q. Silva¹  Sérgio F. Aquino¹ 

[1] ,Universidade Federal de Ouro Preto Departamento de Química Ouro Preto MG ,Brasil

关键词: azo dye;    extracellular degradation;    multivariate experimental designs;   

DOI  :  10.5935/0100-4042.20140133

来源: SciELO

【 摘 要 】

The optimization of the anaerobic degradation of the azo dye Remazol golden yellow RNL was performed according to multivariate experimental designs: a 2² full-factorial design and a central composite design (CCD). The CCD revealed that the best incubation conditions (90% color removal) for the degradation of the azo dye (50 mg L- 1) were achieved with 350 mg L- 1 of yeast extract and 45 mL of anaerobic supernatant (free cell extract) produced from the incubation of 650 mg L- 1 of anaerobic microorganisms and 250 mg L- 1 of glucose. A first-order kinetics model best fit the experimental data (k = 0.0837 h- 1, R² = 0.9263).

【 授权许可】

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