Decomposition of persistent pharmaceuticals in wastewater by ionizing radiation |
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| Authors: | Atsushi Kimura Misako Osawa Mitsumasa Taguchi |
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| Affiliation: | 1. Japan Atomic Energy Agency, 1233 Watanuki-machi, Takasaki-shi, Gunma 370-1292, Japan;2. Gunma Prefectural Sewerage Management General Office, 1846-1 Kaminote, Tamamura-machi, Sawa-gun, Gunma 370-1127, Japan;1. Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing 100084, PR China;2. School of Environment, Tsinghua University, Beijing 100084, PR China;3. Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Beijing 100084, PR China;4. Jiangsu Dasheng Electron Accelerator Device Co., Ltd. Suzhou, Jiangsu 215214, PR China;1. Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 29-33, H-1121 Budapest, Hungary;2. Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary;3. Department of Microbiology and Biotechnology, Szent István University, Somlói út 14-16, H-1118 Budapest, Hungary;4. Faculty of Light Industry and Environmental Engineering, Óbuda University, Doberdó utca 6, H-1034 Budapest, Hungary;1. Hot Laboratory and Waste Management Center (HLWMC), Atomic Energy Authority, P.O. Box 13758, Inshas, Cairo, Egypt;2. Department of Polymer, National Center for Radiation Research and Technology(NCRRT), Atomic Energy Authority, Nasr City, P.O. Box 19, Cairo, Egypt;1. Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary;2. Óbuda University, H-1034 Bécsi út 96b, Budapest, Hungary;3. Budapest University of Technology and Economics, H-1111, Szent Gellért tér 4, Budapest, Hungary;4. Department of Microbiology and Biotechnology, Szent István University, H-1118, Somlói út 14-16., Budapest, Hungary;1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;2. Jiangsu Dasheng Electron Accelerator Device Co., Ltd. Suzhou, Jiangsu 215214, China;1. School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, PR China;2. Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai, 200444, PR China |
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| Abstract: | Pharmaceuticals in wastewater were treated by the combined method of activated sludge and ionizing radiation in laboratory scale. Oseltamivir, aspirin, and ibuprofen at 5 μmol dm?3 in wastewater were decomposed by the activated sludge at reaction time for 4 h. Carbamazepine, ketoprofen, mefenamic acid, clofibric acid, and diclofenac were not biodegraded completely, but were eliminated by γ-ray irradiation at 2 kGy. The rate constants of the reactions of these pharmaceuticals with hydroxyl radicals were estimated by the competition reaction method to be 4.0–10×109 mol?1 dm3 s?1. Decompositions of the pharmaceuticals in wastewater by ionizing radiation were simulated by use of the rate constants and the amount of total organic carbon as parameters. Simulation curves of concentrations of these pharmaceuticals as a function of dose described the experimental data, and the required dose for the elimination of them in wastewater by ionizing radiation can be estimated by this simulation. |
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