Electrochemical Oxidation of Sulfonamides with Boron-Doped Diamond and Pt Anodes

被引：8

作者：

Li, Hongna ^{[1
]}

Jiang, Huan ^{[2
]}

Liu, Chong ^{[1
]}

Zhu, Changxiong ^{[1
]}

Zhu, Xiuping P. ^{[3
]}

机构：

[1] Chinese Acad Agr Sci, Agr Clean Watershed Res Grp, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

[2] Peking Univ, Dept Environm Engn, Beijing 100871, Peoples R China

[3] Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA

来源：

CHEMISTRYOPEN | 2019年 / 8卷 / 12期

基金：

中国国家自然科学基金;

关键词：

electrochemical oxidation; antibiotics; reaction mechansims; anode; wastewater toxicity; WASTE-WATER TREATMENT; ANTIBIOTIC SULFACHLOROPYRIDAZINE; HYDROXYL RADICALS; BISPHENOL-A; DEGRADATION; KINETICS; SULFAMETHAZINE; INCINERATION;

D O I：

10.1002/open.201900250

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electrochemical oxidation processes usually favored specific degradation pathways depending on anode materials. In this work, a series of sulfonamides (SNs) were degraded by electrochemical oxidation. Compared to Pt anodes (0.1567-0.1795 h(-1)), degradation rates of SNs were much higher at boron-doped diamond (BDD) anodes (2.4290-13.1950 h(-1)). However, the same intermediates were detected in the two anode systems. Due to the strong oxidizing ability of BDD anodes, a large amount of intermediates with high toxicities were initially generated and then finally reduced in the BDD anode systems, while the amount of intermediates continuously increased in the Pt anode systems. Additionally, SNs were degraded faster in Na2SO4 than NaH2PO4 electrolytes at BDD anodes, while they were similar at Pt anodes. This study demonstrated that the degradation pathways of SNs at BDD and Pt anodes were similar, but the evolutions of intermediate amounts and toxicities were different due to their varied oxidizing abilities.

引用

页码：1421 / 1428

页数：8

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