期刊
TOXICS
卷 10, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/toxics10110655
关键词
sulfonamides; ecotoxicity; photocatalysis; degradation products; mechanism
资金
- Medical University of Silesia grant [PCN-1002/N/1/F]
This study aimed to determine the kinetics of the photocatalytic degradation of six sulfonamides in different solutions and identify the structures of stable products. The research found that the degradation products of sulfonamides may have significant antibacterial activity and high phytotoxicity, potentially posing a threat to aquatic ecosystems.
The aims of the study were to determine the kinetics of the photocatalytic degradation of six sulfonamides in the presence of TiO2-P25 in acidic, neutral, and alkaline solutions and to identify the structures of the stable products. It was stated that the pH of the solution significantly affected the photocatalytic degradation rate of sulfonamides in acidic and alkaline environments, and the effect likely depended on the susceptibility of sulfonamides to attack by hydroxyl radicals. In the post-reaction mixture, we identified the compounds resulting from the substitution of the aromatic rings with a hydroxyl group; the amide hydrolysis products; the hydroxylamine-, azo, and nitro derivatives; and the compounds formed via the elimination of the sulfone group. Moreover, previously unknown azo compounds were detected. Some degradation products of sulfonamides may exhibit marked bacteriostatic activity and high phytotoxicity. The azo and nitro compounds formed in an acidic environment may be potentially more toxic to aquatic ecosystems than the initial compounds.
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