Kinetics of acetaminophen degradation by Fenton oxidation in a fluidized-bed reactor

doi:10.1016/j.chemosphere.2012.09.003

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/27878

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题名:	Kinetics of acetaminophen degradation by Fenton oxidation in a fluidized-bed reactor
作者:	de Luna, Mark Daniel G. Briones, Rowena M. Su, Chia-Chi Lu, Ming-Chun
贡献者:	環境資源管理系
关键词:	Acetaminophen Fluidized-Bed Fenton Kinetics Intermediates
日期:	2013-01
上传时间:	2014-05-26 10:47:20 (UTC+8)
出版者:	Pergamon-Elsevier Science Ltd
摘要:	Acetaminophen (ACT), an analgesic and antipyretic substance, is one of the most commonly detected pharmaceutical compound in surface waters and wastewaters. In this study, fluidized-bed Fenton (FB-Fenton) was used to decompose ACT into its final degradation products. The 1.45-L cylindrical glass reactor had inlet, outlet and recirculating sections. SiO2 carrier particles were supported by glass beads with 2-4 mm in diameter. ACT concentration was determined by high performance liquid chromatography (HPLC). During the first 40 min of reaction, a fast initial ACT removal was observed and the "two-stage" ACT degradation conformed to a pseudo reaction kinetics. The effects of ferrous ion dosage and [Fe2+]/ [H2O2] (FH ratio) were integrated into the derived pseudo second-order kinetic model. A reaction pathway was proposed based on the intermediates detected through SPME/GC-MS. The aromatic intermediates identified were hydroquinone, benzaldehydes and benzoic acids while the non-aromatic substances include alcohols, ketones, aldehydes and carboxylic acids. Rapid initial ACT degradation rate can be accomplished by high initial ferrous ion concentration and/or low FH ratio. (C) 2012 Elsevier Ltd. All rights reserved.
關聯:	Chemosphere, v.90 n.4, pp.1444-1448
显示于类别:	[Dept. of Environmental Resources Management] Periodical Articles

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