Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec, Canada H3A 2B2.
J Hazard Mater. 2010 May 15;177(1-3):237-43. doi: 10.1016/j.jhazmat.2009.12.023. Epub 2009 Dec 11.
In this study the antibiotic sulfamethoxazole (SMX) was subjected to ozone treatment. Solutions of 60 mg/L and 100 microg/L SMX in pure water and secondary municipal effluent were treated. The removal profile of SMX and its oxidation products was monitored as a function of transferred ozone dose in both matrices. No difference was observed in the ozone dose required for the concentration of SMX to fall below the limit of detection in pure water and wastewater. New peaks with the same retention times were obtained on the HPLC chromatograms for all conditions studied. Solutions with an initial concentration of 60 mg/L required 83 mg/L of ozone to fall below the limit of detection and eight oxidation products were detected. Solutions with an initial concentration of 100 microg/L required 14 mg/L of ozone and only four oxidation products were detected. The four peaks obtained during experiments at low concentration were observed at the same retention times as four of the peaks obtained in higher concentration samples. In ozonated wastewater these products were identified as: 4-aminobenzene sulfonamide, N-(3-phenylpropyl)-acetamide, 2-methyl-benzoxazole and phenol. In addition, methanol, ethanol, acetic acid, methyl acetate and ethyl acetate were identified in the higher concentration samples.
在这项研究中，抗生素磺胺甲恶唑（SMX）被臭氧处理。在纯水中和二级城市污水中处理浓度为 60mg/L 和 100μg/L 的 SMX 溶液。在这两种基质中，监测了 SMX 及其氧化产物的去除情况，作为转移臭氧剂量的函数。在纯水中和废水处理中，SMX 浓度降至检测限以下所需的臭氧剂量没有差异。在所有研究条件下，HPLC 色谱图上都获得了具有相同保留时间的新峰。初始浓度为 60mg/L 的溶液需要 83mg/L 的臭氧才能降至检测限以下，检测到了 8 种氧化产物。初始浓度为 100μg/L 的溶液需要 14mg/L 的臭氧，仅检测到 4 种氧化产物。在低浓度实验中获得的四个峰在相同的保留时间处与在较高浓度样品中获得的四个峰之一相吻合。在臭氧化废水中，这些产物被鉴定为：4-氨基苯磺酰胺、N-(3-苯基丙基)-乙酰胺、2-甲基苯并恶唑和苯酚。此外，在较高浓度的样品中还鉴定出甲醇、乙醇、乙酸、甲基乙酸酯和乙酸乙酯。
