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Optimised photocatalytic degradation of a mixture of azo dyes using a TiO(2)/H(2)O(2)/UV process.
Water Sci Technol. 2012; 65(8):1392-8.WS

Abstract

The aim of the present study was to optimise the photocatalytic degradation of a mixture of six commercial azo dyes, by exposure to UV radiation in an aqueous solution containing TiO(2)-P25. Response surface methodology, based on a 3(2) full factorial experimental design with three replicates was employed for process optimisation with respect to two parameters: TiO(2) (0.1-0.9 g/L) and H(2)O(2) (1-100 mmol/L). The optimum conditions for photocatalytic degradation were achieved at concentrations of 0.5 g TiO(2)/L and 50 mmol H(2)O(2)/L, respectively. Dye mineralisation was confirmed by monitoring TOC, conductivity, sulfate and nitrate ions, with a sulfate ion yield of 96% under optimal reactor conditions. Complete decolorisation was attained after 240 min irradiation time for all tested azo-dyes, in a process which followed a pseudo-first kinetic order model, with a kinetic rate constant of approximately 0.018 min(-1). Based on these results, this photocatalytic process has promise as an alternative for the treatment of textile effluents.

Authors+Show Affiliations

Postgraduate Program of Chemical Engineering, Paraná West State University, Toledo, PR, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

22466584

Citation

Palácio, Soraya Moreno, et al. "Optimised Photocatalytic Degradation of a Mixture of Azo Dyes Using a TiO(2)/H(2)O(2)/UV Process." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 65, no. 8, 2012, pp. 1392-8.
Palácio SM, Espinoza-Quiñones FR, Módenes AN, et al. Optimised photocatalytic degradation of a mixture of azo dyes using a TiO(2)/H(2)O(2)/UV process. Water Sci Technol. 2012;65(8):1392-8.
Palácio, S. M., Espinoza-Quiñones, F. R., Módenes, A. N., Manenti, D. R., Oliveira, C. C., & Garcia, J. C. (2012). Optimised photocatalytic degradation of a mixture of azo dyes using a TiO(2)/H(2)O(2)/UV process. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 65(8), 1392-8. https://doi.org/10.2166/wst.2012.015
Palácio SM, et al. Optimised Photocatalytic Degradation of a Mixture of Azo Dyes Using a TiO(2)/H(2)O(2)/UV Process. Water Sci Technol. 2012;65(8):1392-8. PubMed PMID: 22466584.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Optimised photocatalytic degradation of a mixture of azo dyes using a TiO(2)/H(2)O(2)/UV process. AU - Palácio,Soraya Moreno, AU - Espinoza-Quiñones,Fernando Rodolfo, AU - Módenes,Aparecido Nivaldo, AU - Manenti,Diego Ricieri, AU - Oliveira,Cláudio Celestino, AU - Garcia,Juliana Carla, PY - 2012/4/3/entrez PY - 2012/4/3/pubmed PY - 2012/6/22/medline SP - 1392 EP - 8 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 65 IS - 8 N2 - The aim of the present study was to optimise the photocatalytic degradation of a mixture of six commercial azo dyes, by exposure to UV radiation in an aqueous solution containing TiO(2)-P25. Response surface methodology, based on a 3(2) full factorial experimental design with three replicates was employed for process optimisation with respect to two parameters: TiO(2) (0.1-0.9 g/L) and H(2)O(2) (1-100 mmol/L). The optimum conditions for photocatalytic degradation were achieved at concentrations of 0.5 g TiO(2)/L and 50 mmol H(2)O(2)/L, respectively. Dye mineralisation was confirmed by monitoring TOC, conductivity, sulfate and nitrate ions, with a sulfate ion yield of 96% under optimal reactor conditions. Complete decolorisation was attained after 240 min irradiation time for all tested azo-dyes, in a process which followed a pseudo-first kinetic order model, with a kinetic rate constant of approximately 0.018 min(-1). Based on these results, this photocatalytic process has promise as an alternative for the treatment of textile effluents. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/22466584/Optimised_photocatalytic_degradation_of_a_mixture_of_azo_dyes_using_a_TiO_2_/H_2_O_2_/UV_process_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2012.015 DB - PRIME DP - Unbound Medicine ER -