Catalytic peroxidation of winery wastewater contaminants using activated carbon-supported magnetite nanoparticles

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Esteves, BM (Autor) Outra; Morales-Torres, S (Autor) Outra; Maldonado-Hódar, FJ (Autor) Outra; Luis Madeira (Autor) FEUP

Revista

Título: Journal of Water Process Engineering

Vol. 58

ISSN: 2214-7144

Editora: Elsevier

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00Z-TWQ

DOI: 10.1016/j.jwpe.2024.104772

Abstract (EN): In this study, co-precipitation and hydrothermal synthesis methods were employed to prepare two types of magnetite nanoparticles (MNPs). An activated carbon derived from olive stones (OSAC) was used as MNPssupport. The physicochemical properties of the resulting OSAC-MNPs catalysts were determined using various characterization techniques. A more homogeneous distribution of larger and well-defined MNPs was obtained by hydrothermal synthesis, resulting in a more extensive blockage of the microporous structure of the support. Both catalysts exhibited paramagnetic behavior, but with relatively low magnetization due to the small size and low crystallinity of the Fe3O4 nanoparticles obtained. The catalytic peroxidation performance of OSAC-MNPs was studied using tyrosol (TY) as a model compound, but also real samples of winery wastewater (WW) were used in the optimized operational conditions, including pH, temperature, and doses of catalyst and hydrogen peroxide. The MNPs-based catalyst prepared by co-precipitation performed better in the range of experimental conditions tested because of the higher surface concentration of active phase that is easily accessible to the pollutant and was less prone to deactivation during successive reaction runs. The combination of active materials and optimized process enables to remove up to 92 % TPh, 35 % COD, and 26 % TOC, while the high stability of the samples associated to a low Fe-leaching (0.07 mg L-1) permits the reuse of materials in consecutive cycles.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13