| Texto completo | |
| Autor(es): |
Souto, Robson S.
;
Sanchez-Montes, Isaac
;
Santos, Gessica O. S.
;
Cordeiro-Junior, Paulo J. M.
;
Colombo, Renata
;
Santos, Mauro C.
;
Lanza, Marcos R. V.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 13, n. 2, p. 13-pg., 2025-04-25. |
| Resumo | |
Innovative contaminants treatment approaches are essential to addressing persistent environmental contamination from pesticides such as tebuthiuron (TBT), as they provide us with more effective and safer alternatives to traditional degradation methods. A notable advanced treatment approach is the combined electrochemical process which involves ultraviolet-C (UVC) activation of in-situ electrogenerated H2O2 and chlorine species - the combined UVC/e-H2O2@e-ClO- system. This method uses an electrochemical flow reactor equipped with a gas diffusion cathode and a DSA (R)-Cl2 anode, allowing the simultaneous production of both oxidants. Under the best experimental conditions (10 mA cm-2, 10 mmol L -1 of Cl-, and pH 7), the combined UVC/e-H2O2@e-ClO- system promoted over 99.0 % TBT degradation in 60 min of treatment and 63.2 % total organic carbon removal in 90 min, with low energy consumption (1.54 kWh g -1 TOC). The roles of different reactive oxygen species (H2O2, HClO/ClO-, and hydroxyl radicals (HO center dot)) were also evaluated, and a mineralization pathway was proposed based on the analysis of the by-products generated under the different electrochemical conditions. Although several byproducts were detected during the degradation process, toxicological estimations suggested that these intermediates are less toxic than the parent compound; in this sense, it is evident that the degradation process helps reduce the environmental impact of TBT. Thus, the combined electrochemical process of activating H2O2 and chlorine species effectively degrades organic pollutants in chloride-containing wastewater, offering a sustainable and efficient treatment solution. Additionally, while TBT degradation has been extensively studied in the literature, it is the first time that a combined UVC/e-H2O2@e-ClO- approach has been employed to investigate this contaminant and its toxicity effects following treatment. (AU) | |
| Processo FAPESP: | 20/02743-4 - Filmes de Fe/RuO2-TiO2 suportados em feltro de carbono para degradação do norfloxacino por processo eletro-fenton heterogêneo |
| Beneficiário: | Géssica de Oliveira Santiago Santos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 18/22210-0 - EMU concedido no processo 2017/10118-0: cromatógrafo líquido (HPLC) |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 19/06650-3 - EMU concedido no processo 2017/10118-0: sistema potenciostato com módulo de impedância eletroquímica |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 18/22022-0 - EMU concedido no processo 2017/10118-0: sistema de espectroeletroquímica |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 16/19612-4 - Degradação dos desreguladores endócrinos carbofurano, metilparabeno e propilparabeno via H2O2 eletrogerado e processos associados (H2O2 eletrogerado/UV, eletro-Fenton e fotoeletro-Fenton) |
| Beneficiário: | Paulo Jorge Marques Cordeiro Junior |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 22/12895-1 - Processos avançados para a degradação de poluentes emergentes: materiais catalíticos, sensores eletroanalíticos e divulgação científica |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 18/22211-7 - EMU concedido no processo 2017/10118-0: analisador de carbono orgânico total (TOC) |
| Beneficiário: | Marcos Roberto de Vasconcelos Lanza |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |