Cited by 115Per- and polyfluoroalkyl substances researchAdvanced oxidation water treatmentEnvironmental remediation with nanomaterials

Stability of 6:2 fluorotelomer sulfonate in advanced oxidation processes: degradation kinetics and pathway

Yang, Xiaoling, Huang, Jun, Zhang, Kunlun, Yu, Gang, Deng, Shubo, Wang, Bin·2014·Environmental Science and Pollution Research

Abstract

Perfluorooctane sulfonate (PFOS), a widely used mist suppressant in hard chrome electroplating industry, has been listed in the Stockholm Convention for global ban. 6:2 Fluorotelomer sulfonate (6:2 FTS) acid and salts have been adopted as alternative products in the market, but no data about their abiotic degradation has been reported. In the present study, the degradability of 6:2 FTS potassium salt (6:2 FTS-K) was evaluated under various advanced oxidation processes, including ultraviolet (UV) irradiation, UV with hydrogen peroxide (H2O2), alkaline ozonation (O3, pH = 11), peroxone (O3/H2O2), and Fenton reagent oxidation (Fe(2+)/H2O2). UV/H2O2 was found to be the most effective approach, where the degradation of 6:2 FTS-K followed the pseudo-first-order kinetics. The intermediates were mainly shorter chain perfluoroalkyl carboxylic acid (C7 to C2), while sulfate (SO4 (2-)) and fluoride (F(-)) were found to be the final products. The high yields of SO4 (2-) and F(-) indicate that 6:2 FTS-K can be nearly completely desulfonated and defluorinated under UV/H2O2 condition. The degradation should firstly begin with the substitution of hydrogen atom by hydroxyl radicals, followed by desulfonation, carboxylation, and sequential "flake off" of CF2 unit. Compared with PFOS which is inert in most advanced oxidation processes, 6:2 FTS-K is more degradable as the alternative.

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Crossref · 10.1007/s11356-013-2389-z

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Authors
Yang, X., Huang, J., Zhang, K., Yu, G., Deng, S., & Wang, B.
Affiliations
State Key Joint Laboratory of Environment Simulation and Pollution Control (CN)
Corresponding author
Huang, Jun
Venue
Environmental Science and Pollution Research
Published
2013-12-19
Volume
21
Issue
6
Pages
4634-4642
ISSN
  • 0944-1344 (ISSN-L)
  • 1614-7499
OpenAlex
W2077411136
Cited by
115
References
24
Citations by year
2026: 6 · 2025: 15 · 2024: 9 · 2023: 14 · 2022: 9 · 2021: 9 · 2020: 14 · 2019: 12 · 2018: 5 · 2017: 11 · 2016: 7 · 2015: 3 · 2014: 1
FWCI
2.93
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science and Pollution Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
National High-tech Research and Development Program
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
Keywords
6:2 fluorotelomer sulfonate, advanced oxidation processes, degradation kinetics, degradation intermediates, perfluorinated carboxylic acids, desulfonation, defluorination, hydroxyl radicals, peroxone, Fenton oxidation, ozonation, fluoride release, perfluorinated compounds
MeSH terms
Environmental Pollutants, Fluorocarbons, Hydrogen Peroxide, Iron, Kinetics, Models, Chemical, Oxidation-Reduction, Alkanesulfonic Acids

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