Citation: PENG Bingxian, WANG Xiaoli, LIU Ruihan, ZHOU Aihong. Degradation of Ammonia-Nitrogen in Wastewater by TiO₂/Pumice Photocatalyst under Solar Light[J]. Chinese Journal of Applied Chemistry, ;2017, 34(8): 946-954. doi: 10.11944/j.issn.1000-0518.2017.08.160474 shu

Degradation of Ammonia-Nitrogen in Wastewater by TiO₂/Pumice Photocatalyst under Solar Light

a.
College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
b.
Yanbei Middle School of Yongfeng County, Ji'an, Jiangxi 331504, China
c.
Jiangxi Diyuan Drainage and Water Quality Detection Company Limited, Nanchang 330025, China

Corresponding author: PENG Bingxian, pbingxian@163.com
Received Date: 24 November 2016
Revised Date: 3 January 2017
Accepted Date: 12 February 2017

Fund Project: Natural Science Foundation of Jiangxi Province No.20142BAB203020Supported by Scientific and Technological Plan Project of Jiangxi Province(No.20141BBG70008), Natural Science Foundation of Jiangxi Province(No.20142BAB203020)Scientific and Technological Plan Project of Jiangxi Province No.20141BBG70008

Figures(8)

Photocatalytic degradation of ammonia-nitrogen in simulated wastewater was investigated by the TiO₂/pumice photocatalyst under solar light. TiO₂ prepared by the sol-gel method was used as the photocatalyst and immobilized on porous pumice granules. To optimize the photocatalytic reaction, the effect of the initial concentration of ammonia-nitrogen, pH, reaction time and catalyst loading on the ammonia-nitrogen degradation rate were investigated in an aerated reactor. Also, the morphology and chemical structure properties of the prepared catalysts were characterized by scanning electron microscopy(SEM), X-ray fluorescence spectrometer(XRF) and Fourier transform infrared spectroscopy(FT-IR) analyses. The experimental results indicate that the coating ratio of TiO₂ on pumice is 3.71%; the ammonia-nitrogen degradation rate is increased by increasing the pH value, time of solar light irradiation and dose of TiO₂/pumice. After solar light irradiation for 180 min, a high degradation rate of 82.0% and a removal rate of 86.8% are achieved under 500 mg/L ammonia-nitrogen, pH 11 and 30 g/L TiO₂/pumice. Moreover, the NO₂^- and NO₃^- pollutes are not found in degradation products. The photocatalyst can be reused at least three consecutive times with about 10.0% decrease on the ammonia-nitrogen degradation rate. The results suggest that the photocatalytic purification by photocatalysis is a rapid, low consumed and effective method for the degradation of ammonia-nitrogen in wastewater.
- solar light,
- photocatalyst,
- TiO₂/pumice,
- degradation,
- ammonia-nitrogen
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Degradation of Ammonia-Nitrogen in Wastewater by TiO2/Pumice Photocatalyst under Solar Light

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通讯作者: 陈斌, bchen63@163.com

Degradation of Ammonia-Nitrogen in Wastewater by TiO₂/Pumice Photocatalyst under Solar Light