Oxidative degradation of 2,4,6-tribromophenol by SBA-15 supported metal tetrakis(1-methylpyridinium-4-yl)porphyrins in the presence of humic substances
| Autor: | Shanshan Yin, Yanshuo Li, Chaomin Chen, Qianqian Zhu, Masami Fukushima, Zhenxin Zhang, Xizhuo Jiang, Wei Fang |
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| Rok vydání: | 2021 |
| Předmět: |
Porphyrins
Environmental Engineering Oxidative degradation Chemistry Pyridinium Compounds General Medicine Silicon Dioxide Heterogeneous catalysis 1-methylpyridinium Catalysis 2 4 6-Tribromophenol Metal Oxidative Stress chemistry.chemical_compound Linear relationship Phenols visual_art visual_art.visual_art_medium Degradation (geology) Humic Substances Nuclear chemistry |
| Zdroj: | Journal of Environmental Science and Health, Part A. 56:992-1006 |
| ISSN: | 1532-4117 1093-4529 |
| Popis: | Metal tetrakis(1-methylpyridinium-4-yl)porphyrins were immobilized on sulfonated SBA-15 (MTMPyP-SO3-pr-SBA-15, M = Fe, Mn, Zn) for oxidative degradation of 2,4,6-tribromophenol in the presence of humic substances. The influence of the central metal of metalloporphyrins, pH, and catalyst dosage on the 2,4,6-tribromophenol degradation was investigated. FeTMPyP-SO3-pr-SBA-15 and MnTMPyP-SO3-pr-SBA-15 showed the catalytic activities. The activity of MnTMPyP-SO3-pr-SBA-15 was more strongly inhibited by humic substances than that of FeTMPyP-SO3-pr-SBA-15. Kinetic study indicated that humic substances suppressed the generation of high valent metal-oxo species in MnTMPyP-SO3-pr-SBA-15 at slightly acid condition. There was a clear linear relationship between the content of phenolic-OH and aromatic-C in humic substances and the corresponding inhibition ability. The inhibition by humic substances is probably ascribed to the coordination of humic substances with the monopersulfate species of MnTMPyP-SO3-pr-SBA-15, which prevented the formation of the reactive Mn-oxo species. |
| Databáze: | OpenAIRE |
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