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Ozone: Science & Engineering
The Journal of the International Ozone Association
Volume 40, 2018 - Issue 5
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Original Articles

Degradation of Acid Black 210 by advanced oxidative processes: O3 and O3/UV

Cassandra Bonfante de CarvalhoLaboratory of Separation and Unit Operations, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul90040-040, BrazilCorrespondence[email protected]
,
Marcela Espina de FrancoLaboratory of Separation and Unit Operations, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul90040-040, BrazilORCID Iconhttp://orcid.org/0000-0003-3557-0700
ORCID Icon,
Fernanda Siqueira SouzaLaboratory of Separation and Unit Operations, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul90040-040, Brazil
&
Liliana Amaral FérisLaboratory of Separation and Unit Operations, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul90040-040, Brazil
Pages 372-376 | Received 01 Nov 2017, Accepted 23 Jan 2018, Published online: 08 Feb 2018
 
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ABSTRACT

Acid Black 210 (AB-210) dye is one of the most black dyes used by the leather industry. In the present work, AB-210 degradation in aqueous solution by ozonation (O3) and ozonation with ultraviolet (UV) radiation (O3/UV) was investigated. The effects of pH, initial dye concentration and UV radiation were studied in laboratory scale. Removal was evaluated in terms of residual AB-210 concentration in the treated solution and mineralization efficiency was evaluated by total organic carbon (TOC) analysis. The results indicated that AB-210 is quickly degraded after 15 min but not totally mineralized. It was observed that dye removal of 100% was achieved at pH 3, 7, and 11, while mineralization was found to increase with the pH (55% at pH 11). Concerning UV-C radiation, it enhanced AB-210 degradation at pH 3 but did not reveal any significant effect at pH 7 and 11.

Acknowledgments

The authors thank CAPES for the scholarship.

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