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Decolorization of anthraquinone dye intermediate and its accelerating effect on reduction of azo acid dyes by Sphingomonas xenophaga in anaerobic–aerobic process

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Abstract

Decolorization of 1-aminoanthraquinone-2-sulfonic acid (ASA-2) and its accelerating effect on the reduction of azo acid dyes by Sphingomonas xenophaga QYY were investigated. The study showed that ASA-2 could be efficiently decolorized by strain QYY under aerobic conditions according to the analysis of total organic carbon removal and UV–VIS spectra changes. Moreover, strain QYY was able to reduce azo acid dyes under anaerobic conditions. The effects of various operating conditions such as carbon sources, temperature, and pH on the reduction rate were studied. It was demonstrated that ASA-2 used as a redox mediator could accelerate the reduction process. Consequently the reduction of azo acid dyes mediated by ASA-2 and the decolorization of ASA-2 with strain QYY could be achieved in an anaerobic–aerobic process.

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Abbreviations

AQDS:

Anthraquinone-2,6-disulfonic acid

AQS:

Anthraquinone-2-sulfonic acid

ASA-2:

1-Aminoanthraquinone-2-sulfonic acid

BAA:

1-Amino-4-bromoanthraquinone-2-sulfonic acid

DBSM:

Defined basal salts medium

LB medium:

Luria–Bertani medium

SM:

Synthetic medium

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Authors and Affiliations

  1. School of Environmental and Biological Science and Technology, Dalian University of Technology, 116023, Dalian, P.R. China

    Hong Lu, Jiti Zhou, Jing Wang, Haixin Ai, Chunli Zheng & Yusuo Yang

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  1. Hong Lu
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  2. Jiti Zhou
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  3. Jing Wang
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  4. Haixin Ai
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  5. Chunli Zheng
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  6. Yusuo Yang
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Correspondence to Hong Lu.

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Lu, H., Zhou, J., Wang, J. et al. Decolorization of anthraquinone dye intermediate and its accelerating effect on reduction of azo acid dyes by Sphingomonas xenophaga in anaerobic–aerobic process. Biodegradation 19, 643–650 (2008). https://doi.org/10.1007/s10532-007-9169-8

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  • DOI: https://doi.org/10.1007/s10532-007-9169-8

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