Dependence on the production of the ferril (Fe4 +) and hydroxyl radical (HO ∙) species in the Fenton reaction driven by catechol
The main oxidant species in Fenton and Fenton-like reaction driven by catechol are HO∙ and Fe(IV). The prevalence of these species are dependent of reaction conditions. HO∙ production has been broadly studied in Fenton and Fenton-like reaction driven by catechol. However, there is not a systematic s...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Chile |
| OAI Identifier: | oai:repositorio.anid.cl:10533/222320 |
| Acceso en línea: | https://hdl.handle.net/10533/222320 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Naturales Ciencias Químicas Química Inorgánica y Nuclear |
| Sumario: | The main oxidant species in Fenton and Fenton-like reaction driven by catechol are HO∙ and Fe(IV). The prevalence of these species are dependent of reaction conditions. HO∙ production has been broadly studied in Fenton and Fenton-like reaction driven by catechol. However, there is not a systematic study that relates Fe(IV) with the reaction conditions for Fenton-like reaction driven by catechol, and their differences with Fenton reaction. Considering this, it was proposed the Fe(IV) generation in Fenton reaction at different pH values, using 2,4-xylidine. The results reveal that Fe(IV) was produced at pH = 2.0 and 4.0 through two pathways, corresponding to the formation of Fe(II) peroxocomplex in Fenton systems, and the reaction between Fe(III) y HO· in Fenton–like systems. In Fenton–like systems driven by catechol, Fe(IV) production is higher than Fenton systems. However, its formation route would be through Fe(III) and HO·, due to the reaction between the semiquinone and HO∙, which remains attached to Fe(II) in the peroxocomplex. |
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