Urban biowaste-derived sensitizing materials for caffeine photodegradation.
Environ Sci Pollut Res Int
; 24(14): 12599-12607, 2017 May.
Article
em En
| MEDLINE
| ID: mdl-27696166
ABSTRACT
Caffeine-photosensitized degradation has been studied in the presence of bio-based materials derived from urban biowaste after aerobic aging. A peculiar fraction (namely bio-based substances (BBSs)), soluble in all the pH range, has been used as photosensitizing agent. Several caffeine photodegradation tests have been performed, and positive results have been obtained in the presence of BBSs and H2O2, without and with additional Fe(II) (photo-Fenton-like process). Moreover, hybrid magnetite-BBS nanoparticles have been synthesized and characterized, in order to improve the sensitizer recovery and reuse after the caffeine degradation. In the presence of such nanoparticles and H2O2 and Fe(II), the complete caffeine degradation has been attained in very short time. Both homogeneous and heterogeneous processes were run at pH = 5, milder condition compared to the classic photo-Fenton process.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fotólise
/
Cafeína
Idioma:
En
Revista:
Environ Sci Pollut Res Int
Ano de publicação:
2017
Tipo de documento:
Article