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

Abstract:

Nano-ZnO photocatalyst was prepared using direct precipitation method .The crystal form, particle size and configuration characterization of the nano-ZnO prepared was characterized by XRD and SEM. The photocatalytic degradation of ammonia-N in aquaculture wastewater was investigated by using nano-ZnO under UV irradiation. The experimental results show that: nano-ZnO dosage, catalytic reaction time, initial ammonia-N concentration, H₂O₂ volume concentration, pH value affect the efficiency of photocatalytic degradation significantly. On the basis of the results of these experimental data, the optimal experimental conditions for photocatalytic degradation of ammonia-N are tried through the orthogonal test. The optimization experimental conditions for photocatalytic degradation of ammonia-N in aquaculture wastewater are as follows, nano-ZnO catalyst dosage was 0.4 g/L, the pH value of solution was 10, H₂O₂ volume fraction was 4 %, respectively, if the reaction time may last 1 h, the removal rate of ammonia-N was expected to reach 86.66 %.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 564-568
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.564
• Online since: December 2012
• Authors: Kui Sheng Song, Xiao Cai Yu, Dong Dong Hu, Xu Zheng, Ji Yao Guo
• Keywords: Ammonia Nitrogen, Aquaculture Wastewater, Nano-ZnO, Photocatalytic Degradation

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