期刊
CHEMOSPHERE
卷 90, 期 4, 页码 1444-1448出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2012.09.003
关键词
Acetaminophen; Fluidized-bed Fenton; Kinetics; Intermediates
资金
- National Science Council, Taiwan [NSC 99-2221-E-041-012-MY3]
- Department of Science and Technology, Philippines through the Engineering Research and Development for Technology (ERDT)
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.
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