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Photoassisted Fenton Degradation of Nonbiodegradable Azo Dye (Orange II) in Fe-Free Solutions Mediated by Cation Transfer Membranes
Open accessAbstract
Photoassisted degradation of nonbiodegradable Orange II is shown to be catalyzed by Nafion cation-transfer membranes exchanged with Fe ions in the presence of H 2 O 2 . The Nafion membranes in the oxidative media used degraded Orange II with similar kinetics as found in the homogeneous Fe 3+ /H 2 O 2 photoassisted catalysis, avoiding the drawbacks of the homogeneous treatment. The treatment of this model textile dye is shown to proceed via a Fenton-like process without sludge production because of the selective H 2 O 2 decomposition on the Fe ions exchanged on the membrane. The effect of the concentration of H 2 O 2, solution pH, azo dye concentration, and light intensity (visible light) on the degradation of Orange is reported in detail. The activity of the membranes during the Orange II decomposition was tested for 1500 h and was observed to remain fairly stable within this period. The Fe/Nafion membranes consisted mainly of Fe 2 O 3 (78%) before reaction and Fe 2 O 3 (14%) after light irradiation during Orange II oxidation, as found by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The size of the Fe particles in the Nafion was investigated by transmission electron microscopy (TEM) and turned out to be 37 ± 4 Å. These Q-sized Fe particles on the Nafion absorbed directly the light energy, avoiding the losses due to absorption by the contaminants as it is the case in homogeneous photoassisted Fenton processes. A simplified reaction mechanism for Orange II decomposition is suggested that is consistent with the experimental findings for solutions up to pH 4.8. The Fe redox reactions in the membranes under light were studied via XPS and spectrophotometric techniques. The effect of pretreatment of the azo dye making possible subsequent biological degradation was tested by BOD 5 . A drastic increase of the BOD 5 values for the pretreated solutions was found with respect to the zero BOD 5 value observed for nonpretreated Orange II.
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Cited by
Pignatello, J. J., Oliveros, E., & MacKay, A. (2006) · Critical Reviews in Environmental Science and Technology · doi:10.1080/10643380500326564 · Cited by 4,133
Ajmal, A., Majeed, I., Malik, R. N., Idriss, H., & Nadeem, M. A. (2014) · RSC Adv. · doi:10.1039/c4ra06658h · Cited by 1,485
Clays and oxide minerals as catalysts and nanocatalysts in Fenton-like reactions — A review
Garrido-Ramírez, E. G., Theng, B. K. G., & Mora, M. L. (2010) · Applied Clay Science · doi:10.1016/j.clay.2009.11.044 · Cited by 893
Liang, Z., Yan, C.-F., Rtimi, S., & Bandara, J. (2019) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2018.09.028 · Cited by 689
Self-citationOptimized photodegradation of Reactive Blue 19 on TiO2 and ZnO suspensions
Lizama, C., Freer, J., Baeza, J., & Mansilla, H. D. (2002) · Catalysis Today · doi:10.1016/s0920-5861(02)00222-5 · Cited by 426
Metadata
- Authors
- Fernandez, J., Bandara, J., Lopez, A., Buffat, P., & Kiwi, J.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-12-03
- Volume
- 15
- Issue
- 1
- Pages
- 185-192
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W1980393681
- Cited by
- 228
- References
- 0
- FWCI
- 6.77
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Photoassisted Fenton Degradation of Nonbiodegradable Azo Dye (Orange II) in Fe-Free Solutions Mediated by Cation Transfer Membranes. https://app.cochat.ai/papers/10.1021/la980382a
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- Fernandez, J., Bandara, J., Lopez, A., Buffat, P., & Kiwi, J. (1999). Photoassisted Fenton Degradation of Nonbiodegradable Azo Dye (Orange II) in Fe-Free Solutions Mediated by Cation Transfer Membranes. Langmuir. https://doi.org/10.1021/la980382a
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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