A ferrous oxalate mediated photo-Fenton system: Toward an increased biodegradability of indigo dyed wastewaters

Vedrenne, Michel and Vasquez Medrano, Ruben and Prato Garcia, Dorian and Frontana Uribe, Bernardo A. and Hernandez Esparza, Margarita and Andrés Almeida, Juan Manuel de (2012). A ferrous oxalate mediated photo-Fenton system: Toward an increased biodegradability of indigo dyed wastewaters. "Journal of Hazardous Materials", v. 243 ; pp. 293-301. ISSN 0304-3894. https://doi.org/10.1016/j.jhazmat.2012.10.032.

Description

Title: A ferrous oxalate mediated photo-Fenton system: Toward an increased biodegradability of indigo dyed wastewaters
Author/s:
  • Vedrenne, Michel
  • Vasquez Medrano, Ruben
  • Prato Garcia, Dorian
  • Frontana Uribe, Bernardo A.
  • Hernandez Esparza, Margarita
  • Andrés Almeida, Juan Manuel de
Item Type: Article
Título de Revista/Publicación: Journal of Hazardous Materials
Date: December 2012
ISSN: 0304-3894
Volume: 243
Subjects:
Freetext Keywords: Advanced oxidation process; Ferrous oxalate complex; Indigo dye; Photo-Fenton; Biodegradability
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Química Industrial y del Medio Ambiente
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This study assessed the applicability of a ferrous oxalate mediated photo-Fenton pretreatment for indigo-dyed wastewaters as to produce a biodegradable enough effluent, likely of being derived to conventional biological processes. The photochemical treatment was performed with ferrous oxalate and hydrogen peroxide in a Compound Parabolic Concentrator (CPC) under batch operation conditions. The reaction was studied at natural pH conditions (5–6) with indigo concentrations in the range of 6.67–33.33 mg L−1, using a fixed oxalate-to-iron mass ratio (C2O42−/Fe2+ = 35) and assessing the system's biodegradability at low (257 mg L−1) and high (1280 mg L−1) H2O2 concentrations. In order to seek the optimal conditions for the treatment of indigo dyed wastewaters, an experimental design consisting in a statistical surface response approach was carried out. This analysis revealed that the best removal efficiencies for Total Organic Carbon (TOC) were obtained for low peroxide doses. In general it was observed that after 20 kJ L−1, almost every treated effluent increased its biodegradability from a BOD5/COD value of 0.4. This increase in the biodegradability was confirmed by the presence of short chain carboxylic acids as intermediate products and by the mineralization of organic nitrogen into nitrate. Finally, an overall decrease in the LC50 for Artemia salina indicated a successful detoxification of the effluent.

More information

Item ID: 14038
DC Identifier: http://oa.upm.es/14038/
OAI Identifier: oai:oa.upm.es:14038
DOI: 10.1016/j.jhazmat.2012.10.032
Official URL: http://www.sciencedirect.com/science/article/pii/S0304389412010382
Deposited by: Memoria Investigacion
Deposited on: 20 Dec 2012 10:32
Last Modified: 21 Apr 2016 13:30
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