Enhanced sonochemical degradation of perfluorooctanoic acid by sulfate ions

Jo Chen Lin; Shang Lien Lo; Ching Yao Hu; Yu Chi Lee; Jeff Kuo

doi:10.1016/j.ultsonch.2014.06.006

Enhanced sonochemical degradation of perfluorooctanoic acid by sulfate ions

Jo Chen Lin, Shang Lien Lo, Ching Yao Hu, Yu Chi Lee, Jeff Kuo

School of Public Health

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

Abstract

This study investigated the effects of sulfate ions on the decomposition of perfluorooctanoic acid (PFOA) by ultrasonic (US) irradiation at various pHs, sulfate doses, powers and temperatures. The removal of PFOA was augmented with an increased sulfate ion concentration, with PFOA being almost completely decomposed in 90 min at 25 °C with a sulfate dose of 117 mM. The two major mechanisms in the sulfate-assisted sonochemical system are the direct destruction of PFOA by cavitation and the indirect destruction of PFOA by sulfate free radicals. The decomposition of PFOA followed pseudo-first-order kinetics and was not influenced by pH. The reaction rate constants decreased with increases in temperature due to decreases in the surface tension of the solution.

Original language	English
Pages (from-to)	542-547
Number of pages	6
Journal	Ultrasonics Sonochemistry
Volume	22
DOIs	https://doi.org/10.1016/j.ultsonch.2014.06.006
Publication status	Published - 2015

Keywords

Defluorination
Perfluorooctanoic acid
Sonochemical
Sulfate ion
Surface tension
Ultrasonic

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Acoustics and Ultrasonics
Radiology Nuclear Medicine and imaging

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10.1016/j.ultsonch.2014.06.006

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title = "Enhanced sonochemical degradation of perfluorooctanoic acid by sulfate ions",

abstract = "This study investigated the effects of sulfate ions on the decomposition of perfluorooctanoic acid (PFOA) by ultrasonic (US) irradiation at various pHs, sulfate doses, powers and temperatures. The removal of PFOA was augmented with an increased sulfate ion concentration, with PFOA being almost completely decomposed in 90 min at 25 °C with a sulfate dose of 117 mM. The two major mechanisms in the sulfate-assisted sonochemical system are the direct destruction of PFOA by cavitation and the indirect destruction of PFOA by sulfate free radicals. The decomposition of PFOA followed pseudo-first-order kinetics and was not influenced by pH. The reaction rate constants decreased with increases in temperature due to decreases in the surface tension of the solution.",

keywords = "Defluorination, Perfluorooctanoic acid, Sonochemical, Sulfate ion, Surface tension, Ultrasonic",

author = "Lin, {Jo Chen} and Lo, {Shang Lien} and Hu, {Ching Yao} and Lee, {Yu Chi} and Jeff Kuo",

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language = "English",

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journal = "Ultrasonics Sonochemistry",

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publisher = "Elsevier",

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T1 - Enhanced sonochemical degradation of perfluorooctanoic acid by sulfate ions

AU - Lin, Jo Chen

AU - Lo, Shang Lien

AU - Hu, Ching Yao

AU - Lee, Yu Chi

AU - Kuo, Jeff

PY - 2015

Y1 - 2015

N2 - This study investigated the effects of sulfate ions on the decomposition of perfluorooctanoic acid (PFOA) by ultrasonic (US) irradiation at various pHs, sulfate doses, powers and temperatures. The removal of PFOA was augmented with an increased sulfate ion concentration, with PFOA being almost completely decomposed in 90 min at 25 °C with a sulfate dose of 117 mM. The two major mechanisms in the sulfate-assisted sonochemical system are the direct destruction of PFOA by cavitation and the indirect destruction of PFOA by sulfate free radicals. The decomposition of PFOA followed pseudo-first-order kinetics and was not influenced by pH. The reaction rate constants decreased with increases in temperature due to decreases in the surface tension of the solution.

AB - This study investigated the effects of sulfate ions on the decomposition of perfluorooctanoic acid (PFOA) by ultrasonic (US) irradiation at various pHs, sulfate doses, powers and temperatures. The removal of PFOA was augmented with an increased sulfate ion concentration, with PFOA being almost completely decomposed in 90 min at 25 °C with a sulfate dose of 117 mM. The two major mechanisms in the sulfate-assisted sonochemical system are the direct destruction of PFOA by cavitation and the indirect destruction of PFOA by sulfate free radicals. The decomposition of PFOA followed pseudo-first-order kinetics and was not influenced by pH. The reaction rate constants decreased with increases in temperature due to decreases in the surface tension of the solution.

KW - Defluorination

KW - Perfluorooctanoic acid

KW - Sonochemical

KW - Sulfate ion

KW - Surface tension

KW - Ultrasonic

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JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

ER -

Enhanced sonochemical degradation of perfluorooctanoic acid by sulfate ions

Abstract

Keywords

ASJC Scopus subject areas

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