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Application of soluble bio-organic substances (SBO) as photocatalysts for wastewater treatment: Sensitizing effect and photo-Fenton-like process

Articolo
Data di Pubblicazione:
2013
Abstract:
Soluble bio-organic substances (SBO) isolated from urban biorefuses have been investigated in photocatalytic processes for wastewater treatment using a cationic dye, namely crystal violet (CV) as target compound. The SBO have been found to enhance the photobleaching of CV solutions with an optimal SBO concentration of ca. 20 mg L−1. Mechanistic investigation based on chemical probes and changes in the absorption spectrum of CV in the presence of SBO seems to indicate that a complex formed between sensitizer and substrate plays a major role in the process. SBO have also been tested for the implementation of photo-Fenton processes at circumneutral media: the observed pseudo first order rate constants for CV decoloration was higher for UV/SBO/Fe(II)/H2O2 (5.5 × 10−3 min−1) than for UV/Fe(II)/H2O2 (1.5 × 10−3 min−1). A modified mechanism, in which HO• are less relevant that at the acidic medium, is in agreement with results of experiments carried out with chemical probes.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
J. Gomis; R.F. Vercher;; A.M. Amat; D.O. Mártire; M.C. González; A. Bianco Prevot; E. Montoneri; A. Arques; L. Carlos
Autori di Ateneo:
BIANCO PREVOT Alessandra
Link alla scheda completa:
https://iris.unito.it/handle/2318/135684
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/135684/21469/CV-postprint.pdf
Pubblicato in:
CATALYSIS TODAY
Journal
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