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

Autor:	Mayara Carantino Costa, Francisco Suetônio Bastos Mota, Ronaldo Ferreira do Nascimento, André Bezerra dos Santos, Glaydson L.F. Mendonça
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Chromatography Ethanol Chemistry Reactive black 5 Electron donor General Chemistry Electron acceptor Redox sulphate Congo red color removal redox mediators chemistry.chemical_compound Bioreactor Sulfate Nuclear chemistry
Zdroj:	Química Nova, Volume: 33, Issue: 7, Pages: 1514-1519, Published: 2010 Química Nova v.33 n.7 2010 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Repositório Institucional da Universidade Federal do Ceará (UFC) Universidade Federal do Ceará (UFC) instacron:UFC
ISSN:	0100-4042
DOI:	10.1590/s0100-40422010000700017
Popis:	REDUCTIVE DECOLOURISATION OF AZO DYES AND THE EFFECT OF REDOX MEDIATORS IN THE PRESENCE OF THE ELECTRON ACCEPTOR SULFATE. 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f22cedec630b8025faac95fbc022dbfb https://doi.org/10.1590/s0100-40422010000700017 Zobrazit plný text záznamu