Degradation of amoxicillin,ampicillin and cloxacillin antibiotics in aqueous solution by the UV/ZnO photocatalytic process |
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| Authors: | Emad S Elmolla Malay Chaudhuri |
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| Affiliation: | 1. Graduate School of Natural and Applied Sciences, Erciyes University, 38280, Talas, Kayseri, Turkey;2. Environmental Engineering Department, Faculty of Engineering, Erciyes University, 38280, Talas, Kayseri, Turkey;3. Biology Department, Faculty of Sciences, Erciyes University, 38280, Talas, Kayseri, Turkey;1. School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639789, Singapore;2. Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore;3. School of Chemical and Biological Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639789, Singapore;1. Korea Environment Corporation, 42 hwangyeong-ro, seo-gu, Incheon 404-170, Republic of Korea;2. Department of Environmental Energy Engineering, Kyonggi University, 94 San, Iui-dong, Youngtong-gu, Suwon-si, Gyeonggi-do 442-760, Republic of Korea;1. School of Chemistry, Faculty of Basic Sciences, Shoolini University, Solan, Himachal Pradesh, 173212, India;2. Metrology in Chemistry (ALSIM), CSIR-National Physical Laboratory, Dr K.S. Krishnan Marg, New Delhi, 110012, India;1. The Hydro-Chemistry Laboratory, Department of Geography and Environmental Studies, Tel Aviv University, Tel Aviv 69978, Israel;2. The Porter School of Environmental Studies, Tel Aviv University, Tel Aviv 69978, Israel |
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| Abstract: | The study examined the effect of operating conditions (zinc oxide concentration, pH and irradiation time) of the UV/ZnO photocatalytic process on degradation of amoxicillin, ampicillin and cloxacillin in aqueous solution. pH has a great effect on amoxicillin, ampicillin and cloxacillin degradation. The optimum operating conditions for complete degradation of antibiotics in an aqueous solution containing 104, 105 and 103 mg/L amoxicillin, ampicillin and cloxacillin, respectively were: zinc oxide 0.5 g/L, irradiation time 180 min and pH 11. Under optimum operating conditions, complete degradation of amoxicillin, ampicillin and cloxacillin occurred and COD and DOC removal were 23.9 and 9.7%, respectively. The photocatalytic reactions under optimum conditions approximately followed a pseudo-first order kinetics with rate constant (k) 0.018, 0.015 and 0.029 min?1 for amoxicillin, ampicillin and cloxacillin, respectively. UV/ZnO photocatalysis can be used for amoxicillin, ampicillin and cloxacillin degradation in aqueous solution. |
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