Azo dye biotransformation mediated by AQS immobilized on activated carbon cloth in the presence of microbial inhibitors.

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ID: 21604
2019
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Ranked #128 of 145 articles by views in Environmental pollution (Barking, Essex : 1987)

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Abstract
In this work, anthraquinone-2-sulfonate (AQS) was covalently immobilized onto activated carbon cloth (ACC), to be used as redox mediator for the reductive decolorization of reactive red 2 (RR2) by an anaerobic consortium. The immobilization of AQS improved the capacity of ACC to transfer electrons, evidenced by an increment of 3.29-fold in the extent of RR2 decolorization in absence of inhibitors, compared to incubations lacking AQS. Experiments conducted in the presence of vancomycin, an inhibitor of acidogenic bacteria, and with 2-bromoethane sulfonic acid (BES), an inhibitor of methanogenic archaea, revealed that acidogenic bacteria are the main responsible for RR2 biotransformation mediated by immobilized AQS. Nonetheless, the results also suggest that some methanogens are able to maintain their capacity to use immobilized AQS as an electron acceptor to sustain the decolorization process, even in the presence of BES.
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Authors Castañon, Daniel;Alvarez, Luis H;Peña, Karen;García-Reyes, Refugio B;Martinez, Claudia M;Pat-Espadas, Aurora;
Journal Environmental pollution (Barking, Essex : 1987)
Year 2019
DOI
S0269-7491(19)31472-1
URL
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