Preparation of nano-SnO2 photocatalyst and its photocatalytic oxidation application in aquaculture wastewater

JIN Xiao-jie; YU Xiao-cai; WU Yun-ying; SHANG Xiao-lin; YIN Dan-ni; XUE Guan-hua

doi:10.3969/j.issn.1001-909X.2015.02.009

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Journal of Marine Sciences ›› 2015, Vol. 33 ›› Issue (2) : 64-69. DOI: 10.3969/j.issn.1001-909X.2015.02.009

Preparation of nano-SnO₂ photocatalyst and its photocatalytic oxidation application in aquaculture wastewater

JIN Xiao-jie, YU Xiao-cai^*, WU Yun-ying, SHANG Xiao-lin, YIN Dan-ni, XUE Guan-hua

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Abstract

Nano-SnO₂ photocatalyst was obtained by the chemical precipitation method with SnCl₄·5H₂O as the raw material. The particle size of powders, object and morphology have been characterized using the X-ray diffraction and electron microscope. The photocatalytic degradation of ammonia nitrogen in aquaculture wastewater was investigated by using our home-made nano-SnO₂. The effects of different degradation variables on the degradation efficiency were investigated, and the results show that nano-SnO₂ catalyst dosage, the initial mass concentration of ammonia-N in wastewater, pH value, the mass concentration of H₂O₂ are the main effect factors. The optimum reaction conditions are as follows: nano-SnO₂catalyst dosage is 1.2 g/L, the initial concentration of ammonia-N is 20 mg/L, pH value is 8.0, reaction time is 2 hours and H₂O₂ concentration is 1.0 g/L. Under such condition, the removal rate of ammonia-N can nearly reach 72%.

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aquaculture wastewater / nano-SnO₂ / photocatalytic oxidation / ammonia nitrogen

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JIN Xiao-jie, YU Xiao-cai, WU Yun-ying, SHANG Xiao-lin, YIN Dan-ni, XUE Guan-hua. Preparation of nano-SnO₂ photocatalyst and its photocatalytic oxidation application in aquaculture wastewater[J]. Journal of Marine Sciences. 2015, 33(2): 64-69 https://doi.org/10.3969/j.issn.1001-909X.2015.02.009

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