Effect of dye structure and redox mediators on anaerobic azo and anthraquinone dye reduction

Quimica nova

Costa, Mayara Carantino¹  Mendonça, Glaydson Leandro Farias¹  Santos, André Bezerra Dos¹  Nascimento, Ronaldo Ferreira do¹  Mota, Francisco Suetônio B.¹ 

[1] Universidade Federal do Ceará, Fortaleza, Brasil

关键词: colour removal;    dyes;    structure/activity.;   

DOI  :  10.1590/S0100-40422012000300008

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

We investigatedthe biological decolourisation of dyes with different molecular structures.The kinetic constant values (k1) achieved with azo dye Reactive Red120 were 7.6 and 10.1 times higher in the presence of RM (redox mediators) AQDSand riboflavin, respectively, than the assays lacking RM. The kinetic constantachieved with the azo dye Congo Red was 42 times higher than that obtained withthe anthraquinone dye Reactive Blue 4. The effect of RM on dye reduction wasmore evident for azo dyes resistant to reductive processes, and ineffectivefor anthraquinone dyes because of the structural stability of the latter.

【 授权许可】

CC BY