Using Hybrid Coupling Processes for the Treatment of Waste Containing Halosulfuron-Methyl Herbicide

Autor(es)

Souza, Fernanda L. ; Linares, Jose J. ; Ferreira, Neidenei G. ; Lanza, Marcos R., V

• Tipo de documento: Artigo Científico
• Fonte: CHEMELECTROCHEM; v. 9, n. 11, p. 7-pg., 2022-06-14.

Resumo

This work aims to demonstrate the importance of coupling different degradation processes for the removal of the commercial herbicide Halosulfuron-Methyl (HSM). Using anode oxidation (AO) on boron-doped diamond as the base process; cathodically produced H2O2 (AO/H2O2), UV light (AO/UV), AO/UV/H2O2, electro-Fenton and photoelectron Fenton (PEF) are employed as hybrid processes for HSM degradation. All hybrid processes employed in the study exhibited synergism with AO, and the UV-irradiated processes presented an outstanding performance. In particular, the AO/UV/H2O2 process exhibited 90 % mineralization after 3 h of treatment, whereas the PEF process exhibited a complete removal of HSM after 45 min of treatment. In addition to the noticeable advantages of hybridization, the application of higher current densities is found to accelerate the degradation/mineralization of the compound of interest, although the process tends to be more energy demanding. In such a case, the use of a hybrid treatment process coupled to UV-irradiation allows one to mitigate this constraint while contributing toward obtaining higher mineralization degrees. The degradation/mineralization of more concentrated solutions is, however, found to occur more sluggishly under the treatment mechanisms investigated here, requiring longer times, although the process is noticeably more efficient in photo-irradiated processes, which recorded current efficiencies of above 100 %. (AU)

• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/15000-6 - Processos eletro-oxidativos aplicados na degradação de herbicidas empregados na Orizicultura
• Beneficiário: Fernanda de Lourdes Souza
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado