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HERO ID
3841530
Reference Type
Journal Article
Title
Degradation of octafluorodibenzo-p-dioxin by UV/Fe(II)/potassium monopersulfate system: Kinetics, influence of coexisting chemicals, degradation products and pathways
Author(s)
Zeng, X; Chen, J; Qu, R; Feng, M; Wang, Z
Year
2017
Is Peer Reviewed?
Yes
Journal
Chemical Engineering Journal
ISSN:
1385-8947
Volume
319
Page Numbers
98-107
DOI
10.1016/j.cej.2017.02.152
Web of Science Id
WOS:000399633200011
Abstract
The photodegradation of octafluorodibenzo-p-dioxin (OFDD) in a water/acetonitrile (v/v = 4:1) mixture was here investigated for the first time in the presence of Fe(II) and potassium monopersulfate (PMS) under DV (lambda = 365 nm) irradiation. The degradation efficiency was found to depend on the presence of UV irradiation, and on the initial concentrations of PMS and Fe(II). OFDD with an initial dosage of 1 mg L- 1 as successfully removed by UV/Fe(II)/PMS with OFDD:PMS:Fe(II) = 1:30:5 M ratio within 10 min irradiation. The effects of humic acid, bicarbonate, chloride and solution pH were also evaluated. The degradation process of OFDD by UV/Fe(II)/PMS can be initiated by an oxidative attack of hydroxy radical on carbon atoms in the aromatic ring, the electron transfer reaction of sulfate radical with OFDD and a direct C-O bond homolysis of OFDD. The intermediates and products of OFDD photodegradation were analyzed by using LC/MS technique and the associated photochemical pathway was proposed. The combined process with Fe(II), PMS and UV could be a useful technology for the treatment of wastewater containing OFDD. (C) 2017 Elsevier B.V. All rights reserved.
Keywords
Octafluorodibenzo-p-dioxin (OFDD); UV; Fe(II); PMS; Kinetics; Degradation pathways
Tags
PFAS
•
Expanded PFAS SEM (formerly PFAS 430)
Perfluorooctane
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFOSA (754-91-6)
Literature Search
WOS
•
PFAS Universe
Data Source
Web of Science
Perfluorooctane
•
PFOSA
Literature Search
WOS
Screening Results
Excluded/Not on Topic
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