Anthraquinone compounds as redox mediators for enhanced continuous-flow anaerobic biotransformation of reactive dyes under hypersaline conditions

Title
Anthraquinone compounds as redox mediators for enhanced continuous-flow anaerobic biotransformation of reactive dyes under hypersaline conditions
Authors
이영행S. G. Pavlostathis
Keywords
Textile dyes; decolorization; redox mediators; fluidized-bed bioreactor; salt
Issue Date
2009-06
Publisher
2nd International CEMEPE & SECOTOX conference
Abstract
The effect of anthraquinone disulfonate (AQDS) on the decolorization of the azo dye Reactive Red 198 (RR198) and the anthraquinone dye Reactive Blue 4 (RB4), as well as the effect of RB4 on the decolorization of RR198, both AQDS and RB4 potentially serving as redox mediators, was assessed using an anaerobic, continuous-flow, fluidized-bed bioreactor with an immobilized halotolerant mixed culture. All tests were performed at a reactor temperature of 35oC, a hydraulic retention time of 6.1 h, pH 7.2±0.1, with glucose used as the carbon and electron source. AQDS at relatively low influent concentrations enhanced the extent of RR198 but had a negligible effect on the decolorization of RB4. At an equal concentration of 50 µM, RB4 and AQDS had a similar enhancing effect on the decolorization of the azo dye RR198. Therefore, anthraquinone dyes can serve as redox mediators in mixed, spent textile dyebaths leading to enhanced reductive decolorization rate and extent of other types of dyes (i.e., azo dyes).
URI
http://pubs.kist.re.kr/handle/201004/35897
Appears in Collections:
KIST Publication > Conference Paper
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE