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Efficient removal of formaldehyde from wastewater by Cu defect induction of dendritic snowflake Cu7S4 Fenton-like catalysts.
- Source :
- Journal of Environmental Chemical Engineering; Apr2024, Vol. 12 Issue 2, pN.PAG-N.PAG, 1p
- Publication Year :
- 2024
-
Abstract
- The discharge of colorless and water-soluble formaldehyde (FA) wastewater poses a serious threat to human health. In this study, copper based Fenton-like catalyst Cu x S y was innovatively introduced into the FA degradation system. Cu x S y catalysts with different morphologies were regulated by ethylenediamine. The Cu 7 S 4 catalyst exhibited 99% degradation performance towards FA. The physical and chemical properties of catalysts indicate that the Cu 7 S 4 catalyst has a beautiful dendritic snowflake like structure, which is more conducive to the adsorption and degradation process of FA. Electron paramagnetic resonance (EPR) detected an obvious Cu defect (g=2.064) in Cu 7 S 4 , which can effectively activate H 2 O 2 and stimulate the generation of •OH, thus accelerating the degradation of FA. Compared with Fenton reagent, Cu 7 S 4 shows more than 75% FA degradation performance (pH=5 and pH=9). Further research showed that the H 2 O 2 :Cu 7 S 4 ratio of 2:10 showed a 95% degradation effect on FA at 200–1000 ppm, demonstrating a more efficient and stable FA degradation ability. Moreover, the mechanism of FA degradation was analyzed. [Display omitted] • Recyclable Cu 7 S 4 catalyst with high Cu defects is used to degrade formaldehyde. • 1000 ppm formaldehyde wastewater can be degraded 85% within 30 minutes by Cu 7 S 4. • Cu 7 S 4 has high degradability and mineralization efficiency for formaldehyde. [ABSTRACT FROM AUTHOR]
- Subjects :
- COPPER
ELECTRON paramagnetic resonance
SNOWFLAKES
SEWAGE
CATALYSTS
FORMALDEHYDE
Subjects
Details
- Language :
- English
- ISSN :
- 22133437
- Volume :
- 12
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- Journal of Environmental Chemical Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 176356497
- Full Text :
- https://doi.org/10.1016/j.jece.2024.111982