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Gallic acid photochemical oxidation as a model compound of winery wastewaters
journal contribution
posted on 2015-12-08, 16:04 authored by Marco Lucas, Albino A. Dias, Rui M.F. Bezerra, Jose A. PeresWinery wastewaters (WW) are characterized by their high organic load and by the presence of non-biodegradable compounds such as
phenolic compounds. This study was undertaken to evaluate the capacity of different Advanced Oxidation Processes (AOP) combined
with several radiation sources to degrade the phenolic compound Gallic Acid (GA). A toxicological assessment was also carried out
to evaluate the subproduct’s harmful effect generated during the most efficient AOP in the GA photoxidation. Through the course of
the study it was verified that the UV radiation lamp TNN 15/32 showed the capacity to degrade 34.7% of GA, the UV radiation lamp
TQ 150 achieved a value of 20.2% and the solar radiation presented only a value of 2.3% in 60 minutes. The combination of different
advanced oxidation processes (Fenton’s reagent, ferrioxalate and heterogeneous photocatalysis) were evaluated with the previously
studied sources of radiation. From the experiments conducted it was possible to suggest that the AOP in combination with Fe2+ +
H2O2 + UV TNN 15/32 (photo-Fenton process) was the most efficient process thereby achieving the GA degradation value of 95.6%
in 7.5 minutes and resulting in a total elimination of toxicity.
Keywords: Winery wastewater, gallic acid, advanced oxidation processes, toxicity assessment.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Published in
Journal of Environmental Science and Health, Part AVolume
43Pages
1288 - 1295Citation
LUCAS, M. ... et al, 2008. Gallic acid photochemical oxidation as a model compound of winery wastewaters. Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances and Environmental Engineering, 43 (11), pp.1288-1295Publisher
© Taylor & Francis Group, LLCVersion
- NA (Not Applicable or Unknown)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2008Notes
This paper is closed access.ISSN
1093-4529eISSN
1532-4117Publisher version
Language
- en