Application of redox mediators to accelerate the transformation of reactive azo dyes in anaerobic bioreactors

2001 ◽  
Vol 75 (6) ◽  
pp. 691-701 ◽  
Author(s):  
Frank P. van der Zee ◽  
Renske H. M. Bouwman ◽  
David P. B. T. B. Strik ◽  
Gatze Lettinga ◽  
Jim A. Field
Keyword(s):  
Azo Dyes ◽  
Redox Mediators ◽  
Anaerobic Bioreactors ◽  
Reactive Azo Dyes

scholarly journals Identification of Quinoide Redox Mediators That Are Formed during the Degradation of Naphthalene-2-Sulfonate by Sphingomonas xenophaga BN6

2002 ◽  
Vol 68 (9) ◽  
pp. 4341-4349 ◽  
Author(s):  
Andreas Keck ◽  
Jörg Rau ◽  
Thorsten Reemtsma ◽  
Ralf Mattes ◽  
Andreas Stolz ◽  
...  
Keyword(s):  
Azo Dyes ◽  
High Performance ◽  
Wild Type Strain ◽  
Gene Replacement ◽  
Redox Mediators ◽  
Liquid Chromatography Mass Spectrometry ◽  
Anaerobic Conditions ◽  
Dioxygenase Gene ◽  
Sphingomonas Xenophaga ◽  
Culture Supernatants

ABSTRACT During aerobic degradation of naphthalene-2-sulfonate (2NS), Sphingomonas xenophaga strain BN6 produces redox mediators which significantly increase the ability of the strain to reduce azo dyes under anaerobic conditions. It was previously suggested that 1,2-dihydroxynaphthalene (1,2-DHN), which is an intermediate in the degradative pathway of 2NS, is the precursor of these redox mediators. In order to analyze the importance of the formation of 1,2-DHN, the dihydroxynaphthalene dioxygenase gene (nsaC) was disrupted by gene replacement. The resulting strain, strain AKE1, did not degrade 2NS to salicylate. After aerobic preincubation with 2NS, strain AKE1 exhibited much higher reduction capacities for azo dyes under anaerobic conditions than the wild-type strain exhibited. Several compounds were present in the culture supernatants which enhanced the ability of S. xenophaga BN6 to reduce azo dyes under anaerobic conditions. Two major redox mediators were purified from the culture supernatants, and they were identified by high-performance liquid chromatography-mass spectrometry and comparison with chemically synthesized standards as 4-amino-1,2-naphthoquinone and 4-ethanolamino-1,2-naphthoquinone.

Decolorization and detoxification of reactive azo dyes using cell cultures of a memory tonic herb Evolvulus alsinoides L.

2018 ◽  
Vol 6 (5) ◽  
pp. 6479-6488 ◽  
Author(s):  
Laxmi Shanmugam ◽  
Vikas Bandu Naikawadi ◽  
Mahendra Laxman Ahire ◽  
Tukaram Dayaram Nikam
Keyword(s):  
Cell Cultures ◽  
Azo Dyes ◽  
Evolvulus Alsinoides ◽  
Reactive Azo Dyes

Immobilized Redox Mediators on Anion Exchange Resins and Their Role on the Reductive Decolorization of Azo Dyes

2010 ◽  
Vol 44 (5) ◽  
pp. 1747-1753 ◽  
Author(s):  
Francisco J. Cervantes ◽  
Alberto Garcia-Espinosa ◽  
M. Antonieta Moreno-Reynosa ◽  
J. Rene Rangel-Mendez
Keyword(s):  
Anion Exchange ◽  
Azo Dyes ◽  
Redox Mediators ◽  
Anion Exchange Resins ◽  
Exchange Resins ◽  
Reductive Decolorization

Effect of NaCl concentrations on the photodecoloration of reactive azo-dyes and their cotton dyeings

2014 ◽  
Vol 84 (20) ◽  
pp. 2140-2148 ◽  
Author(s):  
Jiangang Qu ◽  
Ruoyang Chen ◽  
Xia Dong ◽  
Jinxin He
Keyword(s):  
Azo Dyes ◽  
Reactive Azo Dyes

Glucose oxidase effect on treatment of textile effluent containing reactive azo dyes byPhanerochaete chrysosporium

2017 ◽  
Vol 92 (7) ◽  
pp. 1721-1726 ◽  
Author(s):  
Zahra Ansari ◽  
Afzal Karimi ◽  
Shahram Sedghi ◽  
Mohammad Razzaghi ◽  
Sirous Ebrahimi
Keyword(s):  
Glucose Oxidase ◽  
Azo Dyes ◽  
Textile Effluent ◽  
Reactive Azo Dyes
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