INVESTIGADORES
CURUTCHET Gustavo Andres
artículos
Título:
Degradation of Nonylphenol Ethoxylate-9 (NPE-9) by Photochemical Advanced Oxidation Technologies
Autor/es:
LUCIANA DE LA FUENTE, TATIANA ACOSTA, PAOLA BABAY, GUSTAVO CURUTCHET, ROBERTO CANDAL, AND MARTA I. LITTER
Revista:
Industrial & Engineering Chemistry Research
Editorial:
ACS
Referencias:
Año: 2009
ISSN:
1520-5045
Resumen:
The applicability of different photochemical advanced oxidation technologies (PAOTs), namely, direct UV-C
photolysis, UV-C/H2O2 and UV-A/TiO2 heterogeneous photocatalysis (HP), and photo-Fenton reactions (UV-A/
H2O2/Fe2+, PF), for the degradation of 300 mg L-1 nonylphenol ethoxylate-9 (NPE-9) in water is described.
Different kinetic regimes for each PAOT were found, and as a result, comparative efficiencies could be obtained
only from final parameters such as NPE-9 conversion, TOC decrease, and aldehyde production after 3 h of
treatment. The initial photonic efficiencies indicate, however, that UV-A processes make better use of photons
than UV-C processes. Preliminary optimization of PF systems showed that the most efficient NPE-9/H2O2/
Fe2+ molar ratio was 1:1:0.5. Degradation products were partially investigated. Fortunately, toxic 4-nonylphenol
was never found as a byproduct of the degradation after any of the treatments. Aldehydes were formed in all
of the processes, but they appeared at a low extent in PF reactions. Therefore, PF treatments were considered
to be the best degradation processes.2O2 and UV-A/TiO2 heterogeneous photocatalysis (HP), and photo-Fenton reactions (UV-A/
H2O2/Fe2+, PF), for the degradation of 300 mg L-1 nonylphenol ethoxylate-9 (NPE-9) in water is described.
Different kinetic regimes for each PAOT were found, and as a result, comparative efficiencies could be obtained
only from final parameters such as NPE-9 conversion, TOC decrease, and aldehyde production after 3 h of
treatment. The initial photonic efficiencies indicate, however, that UV-A processes make better use of photons
than UV-C processes. Preliminary optimization of PF systems showed that the most efficient NPE-9/H2O2/
Fe2+ molar ratio was 1:1:0.5. Degradation products were partially investigated. Fortunately, toxic 4-nonylphenol
was never found as a byproduct of the degradation after any of the treatments. Aldehydes were formed in all
of the processes, but they appeared at a low extent in PF reactions. Therefore, PF treatments were considered
to be the best degradation processes.2O2/Fe2+, PF), for the degradation of 300 mg L-1 nonylphenol ethoxylate-9 (NPE-9) in water is described.
Different kinetic regimes for each PAOT were found, and as a result, comparative efficiencies could be obtained
only from final parameters such as NPE-9 conversion, TOC decrease, and aldehyde production after 3 h of
treatment. The initial photonic efficiencies indicate, however, that UV-A processes make better use of photons
than UV-C processes. Preliminary optimization of PF systems showed that the most efficient NPE-9/H2O2/
Fe2+ molar ratio was 1:1:0.5. Degradation products were partially investigated. Fortunately, toxic 4-nonylphenol
was never found as a byproduct of the degradation after any of the treatments. Aldehydes were formed in all
of the processes, but they appeared at a low extent in PF reactions. Therefore, PF treatments were considered
to be the best degradation processes.2O2/
Fe2+ molar ratio was 1:1:0.5. Degradation products were partially investigated. Fortunately, toxic 4-nonylphenol
was never found as a byproduct of the degradation after any of the treatments. Aldehydes were formed in all
of the processes, but they appeared at a low extent in PF reactions. Therefore, PF treatments were considered
to be the best degradation processes.2+ molar ratio was 1:1:0.5. Degradation products were partially investigated. Fortunately, toxic 4-nonylphenol
was never found as a byproduct of the degradation after any of the treatments. Aldehydes were formed in all
of the processes, but they appeared at a low extent in PF reactions. Therefore, PF treatments were considered
to be the best degradation processes.