Rapid destruction of the rhodamine B using TiO2 photocatalyst in the liquid phase plasma

Chemistry Central Journal

Heon Lee¹  Sung Hoon Park¹  Young-Kwon Park³  Byung Hoon Kim²  Sun-Jae Kim⁴  Sang-Chul Jung¹ 

[1] Department of Environmental Engineering, Sunchon National University, Sunchon, Jeonnam 540-742, Korea

[2] Department of Dental Materials, School of Dentistry, Chosun University, Gwangju 501-759, Korea

[3] School of Environmental Engineering, University of Seoul, Seoul 130-743, Korea

[4] Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea

关键词: Dyes;    Pulsed discharge;    TiO2;    Bubbling;    Liquid phase plasma;   

Others  :  787838
DOI  :  10.1186/1752-153X-7-156

 received in 2013-06-08, accepted in 2013-08-30,  发布年份 2013

【 摘 要 】

Background

Rhodamine B (RhB) is widely used as a colorant in textiles and food stuffs, and is also a well-known water tracer fluorescent. It is harmful to human beings and animals, and causes irritation of the skin, eyes and respiratory tract. The carcinogenicity, reproductive and developmental toxicity, neurotoxicity and chronic toxicity toward humans and animals have been experimentally proven. RhB cannot be effectively removed by biological treatment due to the slow kinetics. Therefore, RhB is chosen as a model pollutant for liquid phase plasma (LPP) treatment in the present investigation.

Results

This paper presents experimental results for the bleaching of RhB from aqueous solutions in the presence of TiO2 photocatalyst with LPP system. Properties of generated plasma were investigated by optical emission spectroscopy methods. The results of electrical-discharge degradation of RhB showed that the decomposition rate increased with the applied voltage, pulse width, and frequency. The oxygen gas addition to reactant solution increases the degradation rate by active oxygen species. The RhB decomposition rate was shown to increase with the TiO2 particle dosage.

Conclusion

This work presents the conclusions on the photocatalytic oxidation of RhB, as a function of plasma conditions, oxygen gas bubbling as well as TiO2 particle dosage. We knew that using the liquid phase plasma system with TiO2 photocatalyst at high speed we could remove the organic matter in the water.

【 授权许可】

   
2013 Lee et al.; licensee Chemistry Central Ltd.

【 图 表 】

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