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

Química Nova

Costa, Mayara Carantino¹  Mendonça, Glaydson Leandro Farias¹  Santos, André Bezerra Dos¹  Nascimento, Ronaldo Ferreira do¹  Mota, Francisco Suetônio B.¹  Universidade Federal do Ceará, Fortaleza, Brasil¹ 

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 investigated the biological decolourisation of dyes with different molecular structures. The kinetic constant values (k1) achieved with azo dye Reactive Red 120 were 7.6 and 10.1 times higher in the presence of RM (redox mediators) AQDS and riboflavin, respectively, than the assays lacking RM. The kinetic constant achieved with the azo dye Congo Red was 42 times higher than that obtained with the anthraquinone dye Reactive Blue 4. The effect of RM on dye reduction was more evident for azo dyes resistant to reductive processes, and ineffective for anthraquinone dyes because of the structural stability of the latter.

【 授权许可】

Unknown