Journal
CHEMOSPHERE
Volume 228, Issue -, Pages 521-527Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.04.125
Keywords
Fenton-like reaction; PPCPs; Sulfamerazine; Iron oxide; CeO2
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Funding
- National Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07101-003]
- Fundamental Research Funds for the Central Universities [2018ZD08, 2018MS033]
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To develop an efficient and reusable heterogeneous Fenton-like catalyst is a great challenge for its application in practical water treatment. Effective oxygen vacancy (OVs)-promoted Fe2O3-CeO2 catalyst was prepared by a sol-gel method, and applied in the heterogeneous Fenton-like reaction of the sulfamerazine (SMR) degradation. The Fe2O3-CeO2 catalyst showed good activity and stability, and total SMR conversion was achieved in the Fenton-like reaction after 75 min at pH 3.0 and 45 degrees C under O-2 atmosphere. Moreover, the SMR removal was significantly enhanced under 02 atmosphere. The surface bounded (OH)-O-center dot radicals played a dominant role for the SMR degradation. The Fe2O3-CeO2 catalyst remarkably promoted the generation of (OH)-O-center dot in the Fenton-like reaction under O-2 atmosphere, mostly because abundant OVs on the catalyst surface not only accelerated electron transfer to promote the H2O2 decomposition, but also oxygen molecules, adsorbed on OVs, formed O-2(center dot-)/HO2 center dot and promoted the Fe2+/Fe3+ redox cycle. (C) 2019 Elsevier Ltd. All rights reserved.
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