Abstract
Abstract
Purpose
There has been an interest in the microbial azo dye degradation as an optional method for the treatment of azo dye-containing wastes. Tattoo ink is an extremely unique azo dye-rich environment, which have never been explored in terms of microorganisms capable of degrading azo dyes. Previously, we isolated 81 phylogenetically diverse bacteria, belonging to 18 genera and 52 species, contaminated in tattoo inks. In this study, we investigated if these bacteria, which can survive in the azo dye-rich environment, have an ability to degrade azo dyes.
Methods
We conducted a two-step azo dye degradation (or decolorization) assay. In step 1, a high-throughput degradability assay was done for 79 bacterial isolates using Methyl Red and Orange II. In step 2, a further degradation assay was done for 10 selected bacteria with a representative of 11 azo dyes, including 3 commercial tattoo ink azo dyes. Degradation of azo dyes were calculated from measuring optical absorbance of soluble dyes at specific wavelengths.
Results
The initial high-throughput azo dye assay (step 1) showed that 79 isolates had a complete or partial degradation of azo dyes; > 90% of Methyl Red and Orange II were degraded within 24 h, by 74 and 20 isolates, respectively. A further evaluation of azo dye degradability for 10 selected isolates in step 2 showed that the isolates, belonging to Bacillus, Brevibacillus, Paenibacillus, and Pseudomonas, exhibited an excellent decolorization ability for a wide range of azo dyes.
Conclusions
This study showed that phylogenetically diverse bacteria, isolated from azo dye-rich tattoo inks, is able to degrade a diverse range of azo dyes, including 3 azo dyes used in commercial tattoo inks. Some of the strains would be good candidates for future studies to provide a systematic understanding of azo dye degradation mechanisms.
Publisher
Springer Science and Business Media LLC
Subject
Applied Microbiology and Biotechnology
Reference23 articles.
1. Alhassani HA, Rauf MA, Ashraf SS (2007) Efficient microbial degradation of toluidine blue dye by Brevibacillus sp. Dyes Pigments 75(2):395–400. https://doi.org/10.1016/j.dyepig.2006.06.019
2. Bäumler W, Eibler ET, Hohenleutner U, Sens B, Sauer J, Landthaler M (2000) Q-switch laser and tattoo pigments: first results of the chemical and photophysical analysis of 41 compounds. Lasers Surg Med 26(1):13–21. https://doi.org/10.1002/(SICI)1096-9101(2000)26:1<13::AID-LSM4>3.0.CO;2-S
3. Carmen Z, Daniela S (2012) Textile organic dyes-characteristics, polluting effects and separation/elimination procedures from industrial effulents - a critical overview. In: Puzyn T (ed) Organic Pollutants Ten Years after the Sockholm Convention - Environmental and Analytical Update., pp 55–86
4. Chung KT (2016) Azo dyes and human health: a review. J Environ Sci Health C Environ Carcinog Ecotoxicol Rev 34:233–261
5. Feng J, Cerniglia CE, Chen H (2012) Toxicological significance of azo dye metabolism by human intestinal microbiota. Front Biosci 4:568–586
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