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Study on the Degradation of Azo Dye Wastewater by Zero-Valent Iron


Affiliations
1 College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, China
2 Department of Environmental Monitor Station, Qingtian, Zhejiang, 323900, China
3 College of Life Science, Shaoxing University , Shaoxing, 312000, China
 

Wastewater from fabric and yarn dyeing impose serious environmental problems because of their colour and potential toxicity. The release of coloured wastewaters in ecosystems is a dramatic source of aesthetic pollution, eutrophication and perturbations in aquatic life. The most common group of commercial dyes used in the textile industries is azo dyes. The degradation of azo dye wastewater by zero-valent iron was investigated. The dye of C.I. Reactive Red 15 was chosen as object in the experiment. The effects of the dosage of zero-valent iron, pH in solution, reaction time and the initial azo dye concentration on the decolorization were studied in detail. The results showed that the pH value, the dosage of zero-valent iron and the initial azo dye concentration had an important impact on azo dye decolorization. High decolorization efficiency of azo dye wastewater by zero-valent iron was achieved under the optimal condition. The zero-valent iron was also proved to be a universal and efficient reductant for rapid decolorization of the azo dye wastewater. This method can be applied into the treatment of the azo dye wastewater.

Keywords

Decolorization, Azo Dye Wastewater, Zero-Valent Iron, C.I. Reactive Red 15.
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  • Study on the Degradation of Azo Dye Wastewater by Zero-Valent Iron

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Authors

Guijia Qiu
College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, China
Yuanyuan Wu
Department of Environmental Monitor Station, Qingtian, Zhejiang, 323900, China
Luyi Qi
College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, China
Chengguang Chen
College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, China
Linfa Bao
College of Life Science, Shaoxing University , Shaoxing, 312000, China
Muqing Qiu
College of Life Science, Shaoxing University , Shaoxing, 312000, China

Abstract


Wastewater from fabric and yarn dyeing impose serious environmental problems because of their colour and potential toxicity. The release of coloured wastewaters in ecosystems is a dramatic source of aesthetic pollution, eutrophication and perturbations in aquatic life. The most common group of commercial dyes used in the textile industries is azo dyes. The degradation of azo dye wastewater by zero-valent iron was investigated. The dye of C.I. Reactive Red 15 was chosen as object in the experiment. The effects of the dosage of zero-valent iron, pH in solution, reaction time and the initial azo dye concentration on the decolorization were studied in detail. The results showed that the pH value, the dosage of zero-valent iron and the initial azo dye concentration had an important impact on azo dye decolorization. High decolorization efficiency of azo dye wastewater by zero-valent iron was achieved under the optimal condition. The zero-valent iron was also proved to be a universal and efficient reductant for rapid decolorization of the azo dye wastewater. This method can be applied into the treatment of the azo dye wastewater.

Keywords


Decolorization, Azo Dye Wastewater, Zero-Valent Iron, C.I. Reactive Red 15.

References