Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education; Henan Key Laboratory for Environmental Pollution Control; School of Environment, Henan Normal University, Xinxiang, Henan province, 453007, People's Republic of China.
Environ Sci Pollut Res Int. 2013 Dec;20(12):8621-8. doi: 10.1007/s11356-013-1814-7. Epub 2013 May 23.
The degradation of sulfamonomethoxine (SMM) in the aqueous environment by the combination of UV illumination and Oxone has been studied. Experimental results indicated that the UV illumination can effectively activate Oxone to produce sulfate-free radicals (SO4 (-•)). When 10 mmol L(-1) Oxone was added, 96.78 % removal of SMM (5 mg L(-1)) was achieved within 90 min. Mineralization of SMM was investigated by measuring the total organic carbon, which decreased by 89.01 % after 90 min reaction. Six intermediate compounds generated during the SMM degradation were identified with the aid of liquid chromatography and mass spectroscopy, combined with proton nuclear magnetic resonance spectroscopy. A general reaction pathway for the degradation of SMM was proposed, where the presence of SO4 (-•) remained crucial during the degradation process.
研究了在紫外光照射和过一硫酸盐（Oxone）的共同作用下，水环境中磺胺甲恶唑（SMM）的降解情况。实验结果表明，紫外光可以有效地激活过一硫酸盐生成无硫酸盐自由基（SO4 (-•)）。当添加 10 mmol/L 的过一硫酸盐时，在 90 分钟内可实现 5mg/L 的 SMM（磺胺甲恶唑）的 96.78%去除率。通过测量总有机碳来研究 SMM 的矿化情况，在 90 分钟的反应后，总有机碳减少了 89.01%。借助液相色谱和质谱，结合质子核磁共振光谱，共鉴定出 SMM 降解过程中生成的 6 种中间化合物。提出了 SMM 降解的一般反应途径，其中在降解过程中 SO4 (-•)的存在至关重要。
