期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/ijms232415676
关键词
Fenton reaction; sulfonamides; kinetics; toxicity; degradation products
资金
- Medical University of Silesia [PCN-1-030/N/2/F, PCN-1-035/N/2/F]
The study focused on the degradation of sulfonamides used in veterinary medicine through the Fenton process, showing that UVa irradiation can enhance reaction efficiency. Furthermore, it was found that increasing the dose of H2O2 may lead to an increase in the ecotoxicity of the post-reaction mixture.
Sulfonamides used in veterinary medicine can be degraded via the Fenton processes. In the premise, the process should also remove the antimicrobial activity of wastewater containing antibiotics. The kinetics of sulfathiazole degradation and identification of the degradation products were investigated in the experiments. In addition, their toxicity against Vibrio fischeri, the MARA (R) assay, and unselected microorganisms from a wastewater treatment plant and the river was evaluated. It was found that in the Fenton process, the sulfathiazole degradation was described by the following kinetic equation: r(0) = k C-STZ(-1 or 0) C-Fe(II)(3) C-H2O2(0 or 1) C-TOC(-2), where r(0) is the initial reaction rate, k is the reaction rate constant, C is the concentration of sulfathiazole, Fe(II) ions, hydrogen peroxide and total organic carbon, respectively. The reaction efficiency and the useful pH range (up to pH 5) could be increased by UVa irradiation of the reaction mixture. Eighteen organic degradation products of sulfathiazole were detected and identified, and a possible degradation mechanism was proposed. An increase in the H2O2 dose, to obtain a high degree of mineralization of sulfonamide, resulted in an increase in the ecotoxicity of the post-reaction mixture.
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