Evaluation of UV/TiO(2) and UV/ZnO photocatalytic systems coupled to a biological process for the treatment of bleaching pulp mill effluent.
Chemosphere
; 89(6): 732-6, 2012 Oct.
Article
em En
| MEDLINE
| ID: mdl-22818977
This paper presents an exploratory study of pulp mill bleaching effluent treatment by a biological-photocatalytic coupled system. A fungus, Trametes pubescens, immobilized on polyurethane foam was used to inoculate the biological pre-treatment system. The pretreated effluent was then exposed to a photocatalytic treatment in which two catalysts (TiO(2) and ZnO) and two supports (aluminum foil and Luffa cylindrica) were tested. Catalyst characterization was carried out by means of X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Information about crystalline structure, chemical composition, morphology, homogeneity and distribution on the support surface area was obtained. The overall biological-photocatalytic coupled system achieved degradation of 96% of initial total organic carbon (TOC), 97% of 2-chlorophenol (2-CP), 90% of 2,4-dichlorophenol (2,4-CP) and 99% of 2,4,6-trichlorophenol (2,4,6-TCP). This approach of synergistic coupling of T. pubescens and a semiconductor photocatalyst appears to be a viable alternative for the treatment of these non-biodegradable effluents.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Titânio
/
Raios Ultravioleta
/
Poluentes Químicos da Água
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Óxido de Zinco
/
Eliminação de Resíduos Líquidos
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Colômbia
País de publicação:
Reino Unido