Decolorization of Metanil Yellow G by a halophilic alkalithermophilic bacterial consortium

文献类型： 外文期刊

第一作者： Guo, Guang

作者： Guo, Guang;Tian, Fang;Ding, Keqiang;Yang, Feng;Xu, Jin;Hao, Jiuxiao;Liu, Chong;Zhang, Can

作者机构：

关键词： Azodye; Halophilic bacteria; Alkalithermophilic; Decolorization

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2020 年 316 卷

页码：

收录情况： SCI

摘要： Increased temperature, salinity and alkalinity restrict the biodecolorization rate of textile wastewater. In the present study, the halophilic alkalithermophilic bacterial consortium ZSY, which can decolorize azo dyes under 10% salinity, pH 10 and 50 degrees C, was enriched. It can decolorize Metanil Yellow G (MYG) under a wide range of pH values (8-10), temperatures (40-50 degrees C), dye concentrations (100-400 mg/L) and salinity levels (1%-10%). Laccase (Lac), lignin peroxidase (Lip), nicotinamide adenine dinucleotide-dichlorophenol indophenol reductase (NADH-DCIP) and azoreductase are involved in the decolorization process. A decolorization pathway of MYG was proposed via gas chromatography-mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FTIR). The toxicity of MYG decreased after decolorization by ZSY consortium. A metagenomic sequencing approach was subsequently applied to identify the functional genes involved in decolorization. Overall, this halophilic alkalithermophilic bacterial consortium could be a promising candidate for the treatment of textile wastewater in environments with increased temperature, salinity and alkalinity.

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