Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6376240 | Industrial Crops and Products | 2015 | 9 Pages |
Abstract
This study described the anaerobic degradation of the azo dye Remazol Golden Yellow RNL (RGY-RNL) using cellulose-immobilized riboflavin (MC 3) as the redox mediator. This new solid support containing immobilized riboflavin was synthesized from succinylated mercerized cellulose, and was characterized by elemental analysis, FTIR, and solid-state 13C NMR. MC 3 was resistant to pH 2-9, and anaerobic degradation of RGY-RNL using MC 3 in the presence of anaerobic sludge yielded a zero order degradation rate constant (k0,obs) equal to 0.189Â mg/LÂ h, which was 56% better than experiments carried out without a redox mediator. Color removal efficiency after 48Â h of degradation averaged 89.4% in experiments with MC 3 and 72% without the addition of a redox mediator. These results showed that MC 3 can be used to immobilize redox mediators, allowing reduction of wastewater treatment costs.
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Authors
Luide Rodrigo Martins, Bruno Eduardo Lobo Baêta, Leandro VinÃcius Alves Gurgel, Sérgio Francisco de Aquino, Laurent Frédéric Gil,