期刊
RADIATION PHYSICS AND CHEMISTRY
卷 127, 期 -, 页码 85-91出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2016.06.019
关键词
Trimethoprim; Gamma irradiation; Degradation; Advanced oxidation processes
资金
- National Natural Science Foundation of China [51338005]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13026]
The degradation and mineralization of trimethoprim (TMP) by gamma irradiation was investigated in the presence of persulfate (PS). The TMP was degraded at initial concentration of 20 mg/L in aqueous solution with addition of 0, 0.5, 1, 1.5, 2 mM persulfate respectively. The effect of pH values (6.5, 7.5 and 8.5) on TMP degradation was also determined. The experimental results showed that the degradation and mineralization of TMP could be significantly enhanced by persulfate at acidic condition (pH= 6.5). Several intermediate products generated during gamma irradiation process through hydroxylation, demethylation and cleavage were identified using liquid chromatography with tandem mass spectrometry (HPLC-MS). The degradation pathway of TMP was tentatively proposed based on the identification of intermediate products. (C) 2016 Elsevier Ltd. All rights reserved.
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