Metal-free g-C3N4 photocatalysis of organic micropollutants in urban wastewater under visible light 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications
年/卷/期
2019 / 248 /
页码
184-192
ISSN号
0926-3373
作者单位
Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;Univ Porto, LSRE LCM, Dept Engn Quim, Fac Engn, Rua Dr Roberto Frias S-N, P-4200465 Porto, Portugal;
作者
Moreira, Nuno F. F.;Sampaio, Maria J.;Ribeiro, Ana R.;Silva, Claudia G.;Faria, Joaquim L.;Silva, Adrian M. T.;
摘要
Heterogeneous photocatalysis under visible light was employed for the degradation of organic micropollutants (MPs) found in the biologically treated effluents of an urban wastewater treatment plant (UWWTP). The irradiation source consisted in 4 light emitting diodes (LEDs) with a nominal power of 400-500 W m(-2) at 417 nm. Metal-free exfoliated graphitic carbon nitride (gCN(T)), which was synthetized through a simple thermal treatment using dicyandiamide as precursor, was employed as photocatalyst. The gCN(T) material was characterized using different techniques: N-2 adsorption isotherms at 77 K, electron microscopy (scanning and transmission) and diffuse reflectance UV-Vis. The photocatalytic performance of the material was compared to the commercial TiO2 -P25, confirming that gCN(T) led to a remarkable higher removal efficiency of the target MPs. Most of these MPs were removed in less than 10 min to levels below the limit of quantification (carbamazepine > isoproturon > clopidogrel > diclofenac > atenolol > bezafibrate > tramadol > venlafaxine > fluoxetine).
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关键词/主题词
g-C3N4;LED;Visible light;Urban wastewater;Organic contaminants;Phytotoxicity;
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