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HERO ID
5024460
Reference Type
Journal Article
Title
Efficient PFOA degradation by persulfate-assisted photocatalytic ozonation
Author(s)
Wu, Dan; Li, X; Zhang, J; Chen, W; Lu, P; Tang, Y; Li, L
Year
2018
Is Peer Reviewed?
1
Journal
Separation and Purification Technology
ISSN:
1383-5866
Publisher
Elsevier B.V.
Volume
207
Page Numbers
255-261
Language
English
DOI
10.1016/j.seppur.2018.06.059
Web of Science Id
WOS:000445987500029
Abstract
ZnO-reduced graphene oxide (ZnO-rGO) was synthesized successfully at 423 K by a hydrothermal method. The presence of reduced graphene oxide significantly improved the photocatalytic performance of ZnO and its optimal loading ratio was 0.6 wt%. The XRD, SEM, UVâvis and FT-IR were applied to characterize the prepared catalyst. Comparative experiments were conducted to evaluate perfluorooctanoic acid (PFOA) degradation efficiency and the results showed that 99.2% PFOA was degraded in persulfate-assisted photocatalytic ozonation with low dosage of ozone and persulfate at room temperature. The impact factors on PFOA degradation efficiency including loading ratios of GO on ZnO, reaction temperatures and persulfate concentration were inspected and analyzed. The sodium persulfate and ammonium persulfate were compared as common oxidants in photocatalytic ozonation for PFOA degradation and sodium persulfate showed the better PFOA removal. Chloride and humic acid (HA) were common substances in natural water, and they showed inhibition effects on PFOA degradation. Conversion of persulfate to sulfate ion was studied and persulfate concentration during PFOA oxidation was monitored. PFHpA, PFHeA, PFPeA and PFBA were main intermediates during PFOA degradation. © 2018
Keywords
PFOA degradation; Persulfate; Photocatalytic; Ozonation; ZnO-rGO
Tags
•
PFBA
Literature Search Update 5/2019
WOS
Scopus: April 2021
•
PFHpA
Literature Search Update 2017-2019
WOS
•
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search Update (2013-2019)
WOS
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