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Citation
Tags
HERO ID
6326944
Reference Type
Journal Article
Title
Transformation of 6:2 Fluorotelomer Sulfonate by Cobalt(II)-Activated Peroxymonosulfate
Author(s)
Zhang, Y; Liu, J; Moores, A; Ghoshal, S
Year
2020
Is Peer Reviewed?
1
Journal
Environmental Science & Technology
ISSN:
0013-936X
EISSN:
1520-5851
Publisher
American Chemical Society
Volume
54
Issue
7
Page Numbers
4631-4640
Language
English
PMID
32062971
DOI
10.1021/acs.est.9b07113
Web of Science Id
WOS:000526418000094
Abstract
Peroxymonosulfate (PMS)-based advanced oxidation processes generate highly reactive SO4•- and are promising for water treatment. In this study, we investigated the reaction mechanism of 6:2 fluorotelomer sulfonate (6:2 FTS) with Co2+-activated PMS. 6:2 FTS was simultaneously transformed to perfluoroalkyl carboxylic acids (C2-C7 PFCAs) of different chain lengths, with perfluorohexanoic acid (C6) as the predominant one. The mass balance of the intermediates and products versus the initially added 6:2 FTS was close to 100% over the reaction period. Using chemical scavenging methods, we identified that •OH, instead of SO4•-, was the oxidant initiating the reaction of 6:2 FTS. •OH was mainly produced from SO4•- reacting with H2O. Thus, the reactivity of 6:2 FTS was controlled by the factors affecting the production and scavenging of both SO4•- and •OH. Density functional theory calculations showed that •OH oxidizes 6:2 FTS by H-abstraction from ethyl carbons. This is the first study that demonstrates that •OH in Co2+-activated PMS can play a significant role in contaminant transformations. The results indicate that great caution should be taken when PMS or other agents that generate •OH are used for the treatment of water containing 6:2 FTS or its structural analogs.
Tags
IRIS
•
Cobalt
LitSearch Update: January 2019 - December 2021
PubMed
WoS
PFAS
•
Additional PFAS (formerly XAgency)
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
PubMed
Perfluorohexanoic acid
•
PFHxA
LitSearch Update: May 2019 - May 2020
PubMed
WoS
Scopus: April 2021
HAWC
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