Ozone decomposition in water catalyzed by activated carbon: Influence of chemical and textural properties

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Faria, PCC (Autor) Outra; José Melo Orfão (Autor) FEUP; Manuel Fernando R Pereira (Autor) FEUP

Revista

Título: Industrial & Engineering Chemistry Research

Vol. 45

Páginas: 2715-2721

ISSN: 0888-5885

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 76 Citações

Scopus - 100 Citações

Outras Informações

ID Authenticus: P-004-M9E

DOI: 10.1021/ie060056n

Abstract (EN): The decomposition of ozone in water at different solution pHs in the absence or presence of activated carbons with different surface chemistries and textural properties was investigated. Activated carbon acts as a catalyst in the decomposition of ozone into radical species, significantly accelerating this process. Homogeneous and heterogeneous decomposition of ozone were described by second-order kinetic models. In general, both homogeneous and heterogeneous ozone-decomposition rates increase with solution pH. Textural and surface chemical features of the activated carbon play a role in the catalytic decomposition of ozone. Heterogeneous ozone decomposition is enhanced by activated carbon with high surface area and basicity. Despite the mild oxidation undergone by the activated carbon samples during ozonation, no strong deactivation occurs.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7