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The decolorization and mineralization of acid orange 6 azo dye in aqueous solution by advanced oxidation processes: a comparative study.
J Hazard Mater. 2007 Mar 06; 141(1):8-16.JH

Abstract

The comparison of different advanced oxidation processes (AOPs), i.e. ultraviolet (UV)/TiO(2), O(3), O(3)/UV, O(3)/UV/TiO(2), Fenton and electrocoagulation (EC), is of interest to determine the best removal performance for the destruction of the target compound in an Acid Orange 6 (AO6) solution, exploring the most efficient experimental conditions as well; on the other hand, the results may provide baseline information of the combination of different AOPs in treating industrial wastewater. The following conclusions can be drawn: (1) in the effects of individual and combined ozonation and photocatalytic UV irradiation, both O(3)/UV and O(3)/UV/TiO(2) processes exhibit remarkable TOC removal capability that can achieve a 65% removal efficiency at pH 7 and O(3) dose=45mg/L; (2) the optimum pH and ratio of [H(2)O(2)]/[Fe(2+)] found for the Fenton process, are pH 4 and [H(2)O(2)]/[Fe(2+)]=6.58. The optimum [H(2)O(2)] and [Fe(2+)] under the same HF value are 58.82 and 8.93mM, respectively; (3) the optimum applied voltage found in the EC experiment is 80V, and the initial pH will affect the AO6 and TOC removal rates in that acidic conditions may be favorable for a higher removal rate; (4) the AO6 decolorization rate ranking was obtained in the order of O(3)<O(3)/UV=O(3)/UV/TiO(2)<EC<Fenton; (5) the ranking of TOC removal efficiency of selected AOPs was in the order of O(3)=Fenton<EC<O(3)/UV<O(3)/UV/TiO(2) for 30min of reaction time.

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Authors+Show Affiliations

Hsing HJ
Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Road, Taipei 106, Taiwan, ROC.
Chiang PC
No affiliation info available
Chang EE
No affiliation info available
Chen MY
No affiliation info available

MeSH

Azo CompoundsBenzenesulfonatesCatalysisElectricityHydrogen PeroxideHydrogen-Ion ConcentrationIronOrganic ChemicalsOxidants, PhotochemicalOxidation-ReductionOzoneTitaniumUltraviolet RaysWaste Disposal, Fluid

Pub Type(s)

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

Language

eng

PubMed ID

17222965

Citation

Hsing, Hao-Jan, et al. "The Decolorization and Mineralization of Acid Orange 6 Azo Dye in Aqueous Solution By Advanced Oxidation Processes: a Comparative Study." Journal of Hazardous Materials, vol. 141, no. 1, 2007, pp. 8-16.
Hsing HJ, Chiang PC, Chang EE, et al. The decolorization and mineralization of acid orange 6 azo dye in aqueous solution by advanced oxidation processes: a comparative study. J Hazard Mater. 2007;141(1):8-16.
Hsing, H. J., Chiang, P. C., Chang, E. E., & Chen, M. Y. (2007). The decolorization and mineralization of acid orange 6 azo dye in aqueous solution by advanced oxidation processes: a comparative study. Journal of Hazardous Materials, 141(1), 8-16.
Hsing HJ, et al. The Decolorization and Mineralization of Acid Orange 6 Azo Dye in Aqueous Solution By Advanced Oxidation Processes: a Comparative Study. J Hazard Mater. 2007 Mar 6;141(1):8-16. PubMed PMID: 17222965.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The decolorization and mineralization of acid orange 6 azo dye in aqueous solution by advanced oxidation processes: a comparative study. AU - Hsing,Hao-Jan, AU - Chiang,Pen-Chi, AU - Chang,E-E, AU - Chen,Mei-Yin, Y1 - 2006/11/07/ PY - 2005/05/31/received PY - 2005/10/03/revised PY - 2006/05/19/accepted PY - 2007/1/16/pubmed PY - 2007/6/15/medline PY - 2007/1/16/entrez SP - 8 EP - 16 JF - Journal of hazardous materials JO - J Hazard Mater VL - 141 IS - 1 N2 - The comparison of different advanced oxidation processes (AOPs), i.e. ultraviolet (UV)/TiO(2), O(3), O(3)/UV, O(3)/UV/TiO(2), Fenton and electrocoagulation (EC), is of interest to determine the best removal performance for the destruction of the target compound in an Acid Orange 6 (AO6) solution, exploring the most efficient experimental conditions as well; on the other hand, the results may provide baseline information of the combination of different AOPs in treating industrial wastewater. The following conclusions can be drawn: (1) in the effects of individual and combined ozonation and photocatalytic UV irradiation, both O(3)/UV and O(3)/UV/TiO(2) processes exhibit remarkable TOC removal capability that can achieve a 65% removal efficiency at pH 7 and O(3) dose=45mg/L; (2) the optimum pH and ratio of [H(2)O(2)]/[Fe(2+)] found for the Fenton process, are pH 4 and [H(2)O(2)]/[Fe(2+)]=6.58. The optimum [H(2)O(2)] and [Fe(2+)] under the same HF value are 58.82 and 8.93mM, respectively; (3) the optimum applied voltage found in the EC experiment is 80V, and the initial pH will affect the AO6 and TOC removal rates in that acidic conditions may be favorable for a higher removal rate; (4) the AO6 decolorization rate ranking was obtained in the order of O(3)<O(3)/UV=O(3)/UV/TiO(2)<EC<Fenton; (5) the ranking of TOC removal efficiency of selected AOPs was in the order of O(3)=Fenton<EC<O(3)/UV<O(3)/UV/TiO(2) for 30min of reaction time. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17222965/The_decolorization_and_mineralization_of_acid_orange_6_azo_dye_in_aqueous_solution_by_advanced_oxidation_processes:_a_comparative_study_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)01338-0 DB - PRIME DP - Unbound Medicine ER -