phenolic wastewater
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Diego Hoefling Souza ◽  
Mylena Fernandes ◽  
Aniela Pinto Kempka ◽  
Maria de Lourdes Borba Magalhães ◽  
Viviane Trevisan ◽  

Songshan Jiang ◽  
Yuce Zhang ◽  
Shuyang Wang ◽  
Zhihua Chen ◽  
Linglong Yu ◽  

2021 ◽  
Vol 2076 (1) ◽  
pp. 012050
Qiushi Qin ◽  
Ji Huang ◽  
Xu Du ◽  
Jinghong Zhang ◽  
Dong Fu

Abstract The wastewater containing phenol is harmful, and the process is complicated, photocatalytic oxidation technology is believed to be the greenest and promising strategy for contaminants removal because of the solar energy utilization and no additional oxidants. Herein, manganese dioxide(MnO2) doped with metal was fabricated by a low-temperature hydrothermal method, the specific surface area of MnO2 photocatalyst was significantly enhanced by doping metal ion. This making the photocatalytic performance improved obviously, and further applying for phenol degradation under visible light irradiation at room temperature.

2021 ◽  
pp. 131708
Mohammadreza Kamali ◽  
Tejraj M. Aminabhavi ◽  
Luis Tarelho ◽  
Rens Hellemans ◽  
Joren Cuypers ◽  

2021 ◽  
Chen Hou ◽  
Linhui Fu ◽  
Yang Wang ◽  
Wenqiang Chen ◽  
Fang Chen ◽  

Abstract Rapid and accurate detection of phenolic wastewater from industries has created global concern. Herein, core-shell magnetic cellulose nanocrystals supported MOF (Fe3O4/CNC@ZIF-8) with robust peroxidase-like activity was synthesized with tannic acid as modifier and bridge. The peroxidase-mimic catalytic activity of as-prepared Fe3O4/CNC@ZIF-8 was further investigated using o-phenylenediamine (OPD) as peroxidase substrates in the presence of H2O2. Moreover, the experimental conditions were optimized and the kinetic analysis results showed that Fe3O4/CNC@ZIF-8 had higher affinity towards both the substrate OPD and H2O2 than horseradish peroxidase (HRP). Finally, a phenol colorimetric assay with a linear range of 2-200 µM and a detection limit of 0.316 µM was constructed. The catalytic mechanism of Fe3O4/CNC@ZIF-8 with phenol was further investigated by fluorescence test and the generated •OH was proved to act a crucial role to produce quinoid radicals. Additionally, the synthesized magnetic material had excellent stability and recyclability and ease to separation. These results suggest that the Fe3O4/CNC@ZIF-8 may be one of the promising candidates as peroxidase mimic for colorimetric detection of phenol.

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