INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Degradation of Nonylphenol Ethoxylate-9 (NPE-9) by Photochemical Advanced
Autor/es:
DE LA FUENTE, L.; ACOSTA, T.; BABAY, P.; CURUTCHET, G.; CANDAL, R.J; LITTER M.
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington, DC; Año: 2010
ISSN:
0888-5885
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.