期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 343, 期 -, 页码 107-115出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.09.025
关键词
Advanced oxidation process; Dielectric barrier discharge; Energy yield; Mineralization; Falling film reactor
资金
- German Federal Ministry of Economic Affairs and Energy (BMWi) [KF3216203 RH4]
Ozonation and advanced oxidation processes based on photocatalysis (P.C.) and non-thermal plasma generated in a dielectric barrier discharge (DBD) in different gas atmospheres were compared for the degradation and mineralization of 2,4-dichlorophenoxy acetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP) in aqueous solutions, using a planar falling film reactor with comparable design. The energetic yields (G(50)) as measure of the efficiencies of the different methods are for 2,4-D in the order DED/Ar-Fenton > ozonation > DBD/Ar > P.C.ozonation > DEID/Ar:O-2 >> DED/Air > P.C.oxidation. For 2,4-DCP the order is ozonation >> DBD/Ar-Fenton > P.C.ozonation > DBD/Ar > DBD/Ar:O-2 >> P.C.oxidation > DBD/Air. The degradation by using ozone is very effective, but it should be noted that the mineralization measured by the total organic carbon (TOC) removal is low. The reason is the formation of stable towards ozone intermediates, especially low chain carboxylic acids. The fate of these intermediates during the degradation with the different methods has been followed and discussed. (C) 2017 Elsevier B.V. All rights reserved.
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