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

Quimica nova

Baeta, Bruno E. L.¹  Lima, Diego R. S.¹  Silva, Gilmare A. da¹  Aquino, Sérgio F.¹  Silva, Silvana Q.¹ 

[1] Universidade Federal de Ouro Preto, Ouro Preto, Brasil

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

DOI  :  10.5935/0100-4042.20140133

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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

【 授权许可】

CC BY