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Photocatalytic Degradation of Ammonia Nitrogen in Aquaculture Wastewater by Using Nano-TiO2

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Abstract:

The nano-TiO2 photocatalyst was prepared via sol-gel method, and the crystal structure and surface morphology were characterized by XRD and SEM. The photocatalytic degradation of ammonia-N in aquaculture wastewater was investigated by using nano-TiO2 under UV irradiation. In the experiment, the effect of nano-TiO2 dosage, ammonia-N initial concentration, pH value, H2O2 volume concentration, and reaction time, respectively, on the removal of ammonia-N was investigated. On the basis of the results of these experimental data, an orthogonal array experimental design was used to select more efficient degradation condition. The optimal experimental conditions for photocatalytic degradation of ammonia-N can be stated as follows: when the concentration of ammonia-N was 20 mg/L, nano-TiO2 catalyst dosage was 1.2 g/L, the pH value of solution was 5, H2O2 volume fraction was 4 %, respectively, if the reaction time may last 3 h, the removal rate of ammonia-N was expected to reach 92.10 %.

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Periodical:

Advanced Materials Research (Volumes 197-198)

Pages:

774-779

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.197-198.774

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Online since:

February 2011

Authors:

Peng Fei Zhu, Xiao Cai Yu, Qian Du, Kui Sheng Song, Zhong Hua He

Keywords:

Ammonia Nitrogen, Aquaculture Wastewater, Photocatalysis Degradation, TiO2

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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