Photodegradation of amoxicillin by catalyzed Fe^(3+)/H_2O_2 process
Photodegradation of amoxicillin by catalyzed Fe^(3+)/H_2O_2 process作者机构：College of Environmental Science and Engineering Hunan University Changsha 410082 China. Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha 410082 China School of Environment Guangxi University Nanning 530004 China
出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)
年 卷 期：2012年第24卷第2期
页 面：269-275页
核心收录：
学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 0804[工学-仪器科学与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：supported by the National Science Foundation of China (No. 51078128) the Hunan Provincial Innovation Foundation for Postgraduate (No. CX2009B079)
主 题：amoxicillin catalytic oxidation photodegradation
摘 要：Three oxidation processes of UV-Fe3＋（EDTA）/H2O2（UV：ultraviolet light;EDTA：ethylenediaminetetraacetic acid）,UV-Fe3＋/H2O2 and Fe3＋/H2O2 were simultaneously investigated for the degradation of amoxicillin at pH 7.0.The results indicated that,100% amoxicillin degradation and 81.9% chemical oxygen demand（CODCr） removal could be achieved in the UV-Fe3＋（EDTA）/H2O2 process.The treatment efficiency of amoxicillin and CODCr removal were found to decrease to 59.0% and 43.0% in the UV-Fe3＋/H2O2 process;39.6% and 31.3% in the Fe3＋/H2O2 process.Moreover,the results of biodegradability（biological oxygen demand（BOD5）/CODCr ratio） revealed that the UV-Fe3＋（EDTA）/H2O2 process was a promising strategy to degrade amoxicillin as the biodegradability of the effuent was improved to 0.45,compared with the cases of UV-Fe3＋/H2O2（0.25） and Fe3＋/H2O2（0.10） processes.Therefore,it could be deduced that EDTA and UV light performed synergetic catalytic effect on the Fe3＋/H2O2 process,enhancing the treatment efficiency.The degradation mechanisms were also investigated via UV-Vis spectra,and high performance liquid chromatography-mass spectra.The degradation pathway of amoxicillin was further proposed.
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