Descoloração redutiva de corantes azo e o efeito de mediadores redox na presença do aceptor de elétrons sulfato

Química Nova

Mayara Carantino Costa²  André Bezerra Dos Santos²  Francisco Suetônio B. Mota²  Glaydson Leandro Farias Mendonça¹  Ronaldo Ferreira Do Nascimento¹ 

[1] ,Universidade Federal do Ceará Departamento de Engenharia Hidráulica e Ambiental Fortaleza CE ,Brasil

关键词: color removal;    redox mediators;    sulphate;   

DOI  :  10.1590/S0100-40422010000700017

来源: SciELO

【 摘 要 】

We investigated the impact of sulphate and the redox mediator Anthraquinone-2,6-disulfonate (AQDS) on the decolorization of the azo dyes Congo Red (CR) and Reactive Black 5 (RB5). In anaerobic reactors free of extra sulphate dosage, the color removal efficiency decreased drastically when the external electron donor ethanol was removed. In presence of an extra dosage of sulphate, CR decolourisations were 47.8% (free of AQDS) and 96.5% (supplemented with AQDS). The decolourisations achieved in both reactors with RB5 were lower than the ones found with CR. Finally, the biogenic sulphide contribution on azo dye reduction was negligiable.

【 授权许可】

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