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Degradation Kinetics of the Pharmaceutical Metronidazole via UV Photolysis and Advanced Oxidation Processes 药物甲硝唑的紫外光解和高级氧化降解动力学
发布日期: 2005-11-01
药物和个人护理产品是一种新兴的水产品 在世界各地的地下水和地表水中检测到的污染物越来越多 (Halling Sorensen等人,1998年;Stumpf等人,1999年;Heberer,2002年;Calamari等人,2003年)。 甲硝唑在整个欧洲被广泛用于治疗由甲硝唑引起的感染 厌氧细菌和原生动物(Lau等人,1992年)。甲硝唑和其他药物 含硝基咪唑结构的抗菌和抗球虫药物被怀疑是 致癌物和诱变剂(Daeseleire等人,2000年)。不可生物降解且 甲硝唑可溶于水,在常规污水处理过程中不会被去除 (Kummer等人,2000年);因此,它可以在水生环境中积累。 因此,它引起了水务公司的关注,并对饮用水构成了潜在威胁 资源。饮用水源污染治理新技术之一 而工业废水则是通过高级氧化过程(AOP)产生羟基 产生自由基是为了降解有机污染物(Ku等人,1997年)。AOPs可以 用于完全或部分氧化污染物,通常使用两种或两种方法的组合 三种氧化剂。在本研究中,使用UV,UV/H2O2降解甲硝唑, 研究了H2O2/Fe2+,以及UV/H2O2/Fe2+。降解率和效率都很高 比较了紫外光解法和三种高级氧化法 应用包括9个参考文献、图表。
Pharmaceutical substances and personal care products are an emerging class of aquatic contaminants that have been increasingly detected in ground and surface waters worldwide (Halling-Sorensen et al., 1998; Stumpf et al., 1999; Heberer, 2002; Calamari et al., 2003). Metronidazole is extensively used throughout Europe for treating infections caused by anaerobic bacteria and protozoa (Lau et al., 1992). Metronidazole along with other antibacterial and anticoccidial drugs with nitroimidazole structure is suspected of being carcinogens and mutagents (Daeseleire et al., 2000). Being non-biodegradable and soluble in water, metronidazole is not removed during conventional sewage treatment (Kummerer et al., 2000); hence, it can accumulate in the aquatic environment. Consequently, it is of concern to water utilities and a potential threat to drinking water resources. One of the novel technologies for treating polluted sources of drinking water and industrial wastewater is the advanced oxidation processes (AOPs) by which hydroxyl radicals are generated in order to degrade organic pollutants (Ku et al., 1997). AOPs can be applied to fully or partially oxidize pollutants, usually using a combination of two or three oxidants. In this study the degradation of metronidazole using UV, UV/H2O2, H2O2/Fe2+, and UV/H2O2/Fe2+ was investigated. Degradation rates and efficiencies were compared between the UV photolysis and the three advanced oxidation processes applied. Includes 9 references, figures.
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发布单位或类别: 美国-美国给水工程协会
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