期刊
CHEMOSPHERE
卷 57, 期 9, 页码 1165-1171出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2004.07.047
关键词
2,4-D; Fenton's oxidation; herbicide; model; hydrogen peroxide
The Fenton's oxidation kinetics of herbicide 2,4-D at various [Fe(II)] and [H2O2] combinations was investigated and modelled through an unconventional approach. The reaction kinetics of 2,4-D degradation demonstrated a two-stage pattern of decay, where a very fast reactive stage was followed by a retardation stage due to the depletion of oxidants and to the competitive side-reactions of the intermediates (including 2,4-dichlorophenol, chlorohydroquinone and 2,6-dichlororesorcinol). A model characterized by two newly established constants, the initial decay rate and the maximum oxidative capacity, was proposed and proven capable of describing the two-stage process, which cannot easily be described by conventional first- or second-order kinetics approaches. (C) 2004 Elsevier Ltd. All rights reserved.
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