期刊
CHEMICAL ENGINEERING JOURNAL
卷 369, 期 -, 页码 968-978出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.03.140
关键词
Diclofenac; Photoelectrocatalytic; Degradation mechanism; Dechlorination; Active species
资金
- Scientific and Technological Development Fund of Shanghai Pudong New Area [PKJ2015-C10]
- Science and Technological Project of Minhang District [2016MH279]
The presence of diclofenac (DCF) in water has developed into a severe environmental problem due to its pernicious effects on animals and human being. Herein, a photoelectrocatalytic (PEC) method using I doped TiO2 (I-TiO2) photoelectrode has been developed, which exhibited excellent visible activity in the degradation of DCF as well as pharmaceutical wastewater. The Langmuir Hinshelwood kinetic model, active species trapping experiments and analysis of intermediate products were employed to analyze the PEC degradation mechanism of DCF. The results revealed that the decomposition of DCF was primarily performed on the photoelectrode (I-TiO2) surface, and the degradation process was accompanied by the dechlorination reaction. The degradation of DCF was caused mainly by holes (66.6%) and hydroxyl radicals (27.6%) when Na2SO4 acted as electrolyte. The degradation rate of DCF could be significantly enhanced under the condition of high Cl(-)concentration (NaCl acted as electrolyte), which was caused by the participation of chloride radicals (Cl-center dot) in the PEC process. The Cl-center dot was the major factor contributing to the decomposition of DCF, and the holes and hydroxyl radicals played a less important role than Cl-center dot under this condition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据