Ag/g-C<sub>3</sub>N<sub>4</sub>可见光催化技术降解水中磺胺嘧啶的研究

宋亚丽; 张肖静; 朱艺博; 金雅霖; 张硕; 张宏忠

doi:10.3969/j.issn.2096-1553.2019.06.010

November 2019

Article Contents

SONG Yali, ZHANG Xiaojing, ZHU Yibo, et al. Study on degradation of sulfadiazine in water by visible-light catalytic technology of Ag/g-C3N4[J]. Journal of Light Industry, 2019, 34(6): 72-79. doi: 10.3969/j.issn.2096-1553.2019.06.010

Citation: SONG Yali, ZHANG Xiaojing, ZHU Yibo, et al. Study on degradation of sulfadiazine in water by visible-light catalytic technology of Ag/g-C3N4[J]. Journal of Light Industry, 2019, 34(6): 72-79. doi: 10.3969/j.issn.2096-1553.2019.06.010 shu

Study on degradation of sulfadiazine in water by visible-light catalytic technology of Ag/g-C₃N₄

College of Material and Chemical Engineering/He'nan Collaborative Innovation Centre of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Received Date: 2019-06-13

Abstract

Visible-light catalysis technology of Ag/g-C₃N₄ (silver/graphite carbon nitride) was applied to the removal of sulfadiazine in wastewater. The degradation effect of Ag/g-C₃N₄ on sulfadiazine and water quality factors,degradation mechanism,intermediate products and its degradation effect on sulfadiazine in actual water were investigated. The results showed that Ag/g-C₃N₄ with a mass fraction of 5% could effectively degrade sulfadiazine under visible-light irradiation,with a removal rate of up to 98.3%,and the degradation process conformed to the pseudo-first-order kinetic model; the pH and alkalinity of the solution Ag/g-C₃N₄ had little effect on the degradation of sulfadiazine,but the presence of humic acid in the solution inhibited the degradation of sulfadiazine; during the degradation of sulfadiazine,·O^2- and photogenerated holes were the main activities species; the degradation process mainly produced 4 kinds of intermediate products,which were 2-aminopyrimidine,p-aminobenzenesulfonic acid,hydroxylated sulfadiazine,and nitrated sulfadiazine. When the Songhua River water and the secondary effluent of domestic sewage were used as the water quality background,the removal rates of Ag/g-C₃N₄ for sulfadiazine were 95.4% and 77.5%,respectively.
- Ag/g-C₃N₄,
- visible-light catalytic technology,
- sulfadiazine,
- degradation mechanism
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