Biodegradation of triphenylmethane dye Malachite Green by <Emphasis Type="Italic">Sphingomonas paucimobilis</Emphasis> |
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Authors: | Lamia Ayed Kamel Chaieb Abdelkarim Cheref Amina Bakhrouf |
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Institution: | (1) Laboratoire d’Analyse, Faculté de Pharmacie, Traitement et Valorisation des Polluants de l’Environnement et des Produits, Rue Avicenne, 5000 Monastir, Tunisia;(2) Laboratoire de Géochimie et Physicochimie de l’Eau, CERTE, Technopole Borj Cedria, 2073 Nabeul, Tunisia |
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Abstract: | Triphenylmethane dyes belong to the most important group of synthetic colorants and are used extensively in the textile industries
for dying cotton, wool, silk, nylon, etc. They are generally considered as the xenobiotic compounds, which are very recalcitrant
to biodegradation. Sphingomonas paucimobilis, was isolated from the soil sample collected from contaminated sites of textile industry located in KsarHellal, Tunisia,
and it was able to decolorize Malachite Green (MG) dye (50 mg/l) within 4 h under shaking condition (pH 9 and temperature
25°C). The effect of inoculum size, dye concentration, temperature and initial pH of the solution were studied. The results
obtained from the batch experiments revealed the ability of the tested bacteria to remove dye. UV–Vis spectroscopy and FTIR
analysis of samples before and after decolorization confirmed the ability of the tested strain to decolorize MG. In addition,
the phytotoxicity study revealed the degradation of MG into non-toxic product by S. paucimobilis. |
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Keywords: | Decolorization Malachite Green Phytotoxicity Sphingomonas paucimobilis Triphenylmethane dyes |
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