Tratamento de efluentes contaminados com glifosato com base no desenvolvimento de SBA-15 impregnado com Fe como catalisador avançado para o processo de oxidação úmida em condições ambientais.
DOI:
https://doi.org/10.33414/rtyc.42.55-67.2021Palavras-chave:
Tratamento de água poluída, Glifosato, Nanomateriais, Teor de FeResumo
Sólidos nanoestruturados impregnados com diferentes teores de ferro (1, 2,5, 5 e 10% p / p) foram desenvolvidos como catalisadores eficazes para degradar soluções aquosas de glifosato em condições de reação extremamente suaves: pressão atmosférica e temperatura ambiente. Esses materiais foram caracterizados por XRD, fissão de N2, UVvis-DR e XPS. Estruturas mesoporosas regulares típicas dos sólidos SBA-15 foram obtidas e a especiação de Fe pode ser ajustada variando a carga nominal do metal. Os catalisadores foram avaliados na reação de degradação-fragmentação do glifosato por oxidação catalítica úmida com ar, atingindo níveis de degradação do herbicida na ordem de 80%. Um caminho de reação foi proposto com base na formação de um intermediário oxo-ferro (V) altamente reativo do complexo Fe-glifosato. Desta forma, apresenta-se uma tecnologia interessante com menor impacto ambiental e maior sustentabilidade para a remediação de água contaminada com glifosato.
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Copyright (c) 2021 Eliana Gabriela Vaschetto, Candelaria Gómez, Pablo Ochoa Rodríguez, Sandra Casuscelli, Verónica Elías, Griselda Eimer
Este trabalho está licenciado sob uma licença Creative Commons Attribution-NonCommercial 4.0 International License.
