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Mineralization of Acid Yellow 36 azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode.
Chemosphere. 2011 Jan; 82(4):495-501.C

Abstract

The degradation of the Acid Yellow 36 (AY36) azo dye is studied by electro-Fenton (EF) and solar photoelectro-Fenton (SPEF) using a recirculation flow plant with an undivided cell containing a boron-doped diamond anode and an air-diffusion cathode for H₂O₂ electrogeneration, coupled with a solar photoreactor. A solution of 2.5L with 108 mg L⁻¹ of the dye and 0.5 mM Fe²(+) at pH 3.0 was comparatively treated at constant current. Hydroxyl radicals formed from Fenton's reaction and at the anode surface are the main oxidants. Total mineralization is almost achieved in SPEF, while EF yields poor TOC removal. Both processes are accelerated with increasing current. AY36 decays with similar rate in EF and SPEF following a pseudo first-order reaction, but the solution is more slowly decolorized because of the formation of conjugated byproducts. NH₄(+) ion is released in SPEF, while NO₃⁻ ion is mainly lost in EF. Tartronic, maleic, fumaric, oxalic, formic and oxamic acids are detected as generated carboxylic acids. Fe(III)-oxalate complexes are largely accumulated in EF and their quick photodecomposition in SPEF explains its higher oxidation power. The SPEF method yields greater current efficiency and lower energy cost as current decreases, and then it is more viable at low currents.

Authors+Show Affiliations

Universidad Autónoma de Nuevo León, Monterrey, Mexico.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21112608

Citation

Ruiz, Edgar J., et al. "Mineralization of Acid Yellow 36 Azo Dye By electro-Fenton and Solar photoelectro-Fenton Processes With a Boron-doped Diamond Anode." Chemosphere, vol. 82, no. 4, 2011, pp. 495-501.
Ruiz EJ, Arias C, Brillas E, et al. Mineralization of Acid Yellow 36 azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode. Chemosphere. 2011;82(4):495-501.
Ruiz, E. J., Arias, C., Brillas, E., Hernández-Ramírez, A., & Peralta-Hernández, J. M. (2011). Mineralization of Acid Yellow 36 azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode. Chemosphere, 82(4), 495-501. https://doi.org/10.1016/j.chemosphere.2010.11.013
Ruiz EJ, et al. Mineralization of Acid Yellow 36 Azo Dye By electro-Fenton and Solar photoelectro-Fenton Processes With a Boron-doped Diamond Anode. Chemosphere. 2011;82(4):495-501. PubMed PMID: 21112608.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mineralization of Acid Yellow 36 azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode. AU - Ruiz,Edgar J, AU - Arias,Conchita, AU - Brillas,Enric, AU - Hernández-Ramírez,Aracely, AU - Peralta-Hernández,J M, Y1 - 2010/11/26/ PY - 2010/09/03/received PY - 2010/11/01/revised PY - 2010/11/03/accepted PY - 2010/11/30/entrez PY - 2010/11/30/pubmed PY - 2011/2/18/medline SP - 495 EP - 501 JF - Chemosphere JO - Chemosphere VL - 82 IS - 4 N2 - The degradation of the Acid Yellow 36 (AY36) azo dye is studied by electro-Fenton (EF) and solar photoelectro-Fenton (SPEF) using a recirculation flow plant with an undivided cell containing a boron-doped diamond anode and an air-diffusion cathode for H₂O₂ electrogeneration, coupled with a solar photoreactor. A solution of 2.5L with 108 mg L⁻¹ of the dye and 0.5 mM Fe²(+) at pH 3.0 was comparatively treated at constant current. Hydroxyl radicals formed from Fenton's reaction and at the anode surface are the main oxidants. Total mineralization is almost achieved in SPEF, while EF yields poor TOC removal. Both processes are accelerated with increasing current. AY36 decays with similar rate in EF and SPEF following a pseudo first-order reaction, but the solution is more slowly decolorized because of the formation of conjugated byproducts. NH₄(+) ion is released in SPEF, while NO₃⁻ ion is mainly lost in EF. Tartronic, maleic, fumaric, oxalic, formic and oxamic acids are detected as generated carboxylic acids. Fe(III)-oxalate complexes are largely accumulated in EF and their quick photodecomposition in SPEF explains its higher oxidation power. The SPEF method yields greater current efficiency and lower energy cost as current decreases, and then it is more viable at low currents. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/21112608/Mineralization_of_Acid_Yellow_36_azo_dye_by_electro_Fenton_and_solar_photoelectro_Fenton_processes_with_a_boron_doped_diamond_anode_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(10)01295-6 DB - PRIME DP - Unbound Medicine ER -