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231225s2023 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2021.2024888
|2 doi
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|a pubmed25n1116.xml
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|a (DE-627)NLM335035051
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|a (NLM)34967702
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Kang, Xin
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Efficient removal of 3,6-dichlorocarbazole with Fe0-activated peroxymonosulfate
|b performance, intermediates and mechanism
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 05.06.2023
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|a Date Revised 05.06.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Nowadays, polyhalogenated carbazoles (PHCZs) are a major pollutant that has recently sparked widespread concern. In this work, peroxymonosulfate (PMS) was activated by zero valent iron (Fe0) to remove 3,6-dichlorocarbazole (3,6-CCZ). First, the key parameters influencing 3,6-CCZ degradation (PMS dosage, Fe0 dosage, initial pH, temperature and co-existing ions) were determined. Under the determined optimum conditions, the removal rate of 3,6-CCZ reached 100% within 1.5 h. Sulfate radicals (SO4·-), hydroxyl radicals (OH·), and singlet oxygen (1O2) generated in the reaction were directly identified with 0.1 M 5,5-dimethyl-1-pyrrolidine N-oxide (DMPO) by in-situ electron paramagnetic resonance (EPR) and indirectly identified by radical quenching experiments. The main reactive oxygen species (ROS) were different from most reported hydroxyl radicals (OH·) and sulfate radicals (SO4·-). In this study, it was found that OH· and 1O2 play a major role. Then, fresh and reacted Fe0 were characterized by XRD, SEM, and XPS. Iron corrosion products such as Fe2O3, Fe3O4, and FeOOH were generated. Finally, 3,6-CCZ degradation intermediates were identified by GC-MS and its degradation pathway was speculated. The intermediate pathway confirmed the combined action of (OH·) and (1O2) in 3,6-CCZ removal. This study provides new insight into the activation mechanism of Fe0-activated PMS and the removal mechanism of 3,6-CCZ.Highlights Fe0 is a long-lasting and efficient catalyst of PMS for the degradation of 3,6-CCZ.The key parameters influencing 3,6-CCZ degradation were determined.The degradation pathways of 3,6-CCZ were inferred.OH· and 1O2 were the main ROS in Fe0-activated PMS system
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|a Journal Article
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|a 3,6-Dichlorocarbazole(3,6-CCZ)
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|a degradation pathways
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|a mechanism
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|a peroxymonosulfate (PMS)
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|a radical identification
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|a peroxymonosulfate
|2 NLM
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|a 22047-43-4
|2 NLM
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| 650 |
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|a 3,6-dichlorocarbazole
|2 NLM
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| 650 |
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|a Reactive Oxygen Species
|2 NLM
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| 650 |
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|a Peroxides
|2 NLM
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| 650 |
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|a Iron
|2 NLM
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|a E1UOL152H7
|2 NLM
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| 650 |
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|a Oxygen
|2 NLM
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| 650 |
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|a S88TT14065
|2 NLM
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|a Hydroxyl Radical
|2 NLM
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|a 3352-57-6
|2 NLM
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| 650 |
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|a Sulfates
|2 NLM
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| 700 |
1 |
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|a Li, Dongpeng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chu, Linglong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Xiaoxiang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Song, Xinshan
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Environmental technology
|d 1993
|g 44(2023), 15 vom: 13. Juni, Seite 2201-2214
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnas
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| 773 |
1 |
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|g volume:44
|g year:2023
|g number:15
|g day:13
|g month:06
|g pages:2201-2214
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|u http://dx.doi.org/10.1080/09593330.2021.2024888
|3 Volltext
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|d 44
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