Removal of diclofenac by three-dimensional electro-Fenton-persulfate (3D electro-Fenton-PS)

被引：90

作者：

Long, Yingying ^{[1
]}

Feng, Yan ^{[1
]}

Li, Xue ^{[4
]}

Suo, Ning ^{[1
]}

Chen, Hao ^{[1
]}

Wang, Zhongwei ^{[3
]}

Yu, Yanzhen ^{[2
]}

机构：

[1] Univ Jinan, Sch Civil Engn & Architecture, Jinan 250022, Shandong, Peoples R China

[2] Qilu Inst Technol, Sch Civil Engn & Architecture, Jinan 250022, Shandong, Peoples R China

[3] Everbright Water Jinan Co Ltd, Jinan 250022, Shandong, Peoples R China

[4] China Urban Construct & Res Inst, Shenzhen Branch, Shenzhen 518133, Peoples R China

来源：

CHEMOSPHERE | 2019年 / 219卷

基金：

中国国家自然科学基金;

关键词：

DIC; Sulfate radicals; Hydroxyl radicals; TDE; 3D electro-Fenton-PS; WATER TREATMENT-PLANT; WASTE-WATER; DEGRADATION PATHWAYS; ENVIRONMENTAL RISK; HYDROGEN-PEROXIDE; AQUEOUS-SOLUTION; PHARMACEUTICALS; CONTAMINANTS; OXIDATION; MEDIA;

D O I：

10.1016/j.chemosphere.2018.12.054

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Diclofenac (DIC) is a new type of contaminant that has been widely detected in the water environment, posing threats to the ecological environment and human health. However, the conventional wastewater treatment process has a very limited ability to reduce DIC. In this research, persulfate is added to electro-Fenton with the three-dimensional particle electrode (TDE) process whose particle electrodes were formed from manganese slag with loaded active substance (Cu: Fe = 1:1) to construct a three-dimensional electro-Fenton-persulfate (3D electro-Fenton-PS) process to investigate the removal rate of DIC under the optimum working conditions. The effects of different persulfate addition, activator addition and different activators on the removal rate of DIC were researched, respectively. The removal rate of DIC reached 96.3% when the persulfate and the Fe-0 addition were 1,50 mM and 3.00 mM, respectively. The results showed that SO4 center dot- and center dot OH existed simultaneously in the reaction system, and the removal of DIC was the result of the two free radicals. Moreover, degradation pathways and mechanism of DIC were also discussed. The study may provide a new theoretical basis and technical support for the treatment of DIC in municipal wastewater. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：1024 / 1031

页数：8