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Removal of colour and COD from wastewater containing acid blue 22 by electrochemical oxidation.
J Hazard Mater. 2008 May 01; 153(1-2):83-8.JH

Abstract

Electrochemical oxidation of synthetic wastewater containing acid blue 22 on a boron-doped diamond electrode (BDD) was studied, using cyclic voltammetry and bulk electrolysis. The influence of current density, dye concentration, flow rate, and temperature was investigated, in order to find the best conditions for COD and colour removal. It was found that, during oxidation, a polymeric film, causing BDD deactivation, was formed in the potential region of water stability, and that it was removed by anodic polarisation at high potentials in the region of O(2) evolution. Bulk electrolysis results showed that the electrochemical process was suitable for completely removing COD and effectively decolourising wastewaters, due to the production of hydroxyl radicals on the diamond surface. In particular, under optimal experimental conditions of flow rates (i.e. 300 dm(3) h(-1)) and current density (i.e. 20 mA cm(-2)), 97% of COD was removed in 12h electrolysis, with 70 kWh m(-3) energy consumption.

Authors+Show Affiliations

Dipartimento di Ingegneria Chimica e di Processo GB Bonino, Università degli Studi di Genova, Genova, Italy. marco.panizza@unige.itNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17869416

Citation

Panizza, Marco, and Giacomo Cerisola. "Removal of Colour and COD From Wastewater Containing Acid Blue 22 By Electrochemical Oxidation." Journal of Hazardous Materials, vol. 153, no. 1-2, 2008, pp. 83-8.
Panizza M, Cerisola G. Removal of colour and COD from wastewater containing acid blue 22 by electrochemical oxidation. J Hazard Mater. 2008;153(1-2):83-8.
Panizza, M., & Cerisola, G. (2008). Removal of colour and COD from wastewater containing acid blue 22 by electrochemical oxidation. Journal of Hazardous Materials, 153(1-2), 83-8.
Panizza M, Cerisola G. Removal of Colour and COD From Wastewater Containing Acid Blue 22 By Electrochemical Oxidation. J Hazard Mater. 2008 May 1;153(1-2):83-8. PubMed PMID: 17869416.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of colour and COD from wastewater containing acid blue 22 by electrochemical oxidation. AU - Panizza,Marco, AU - Cerisola,Giacomo, Y1 - 2007/08/12/ PY - 2007/02/15/received PY - 2007/08/07/revised PY - 2007/08/08/accepted PY - 2007/9/18/pubmed PY - 2008/7/3/medline PY - 2007/9/18/entrez SP - 83 EP - 8 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 153 IS - 1-2 N2 - Electrochemical oxidation of synthetic wastewater containing acid blue 22 on a boron-doped diamond electrode (BDD) was studied, using cyclic voltammetry and bulk electrolysis. The influence of current density, dye concentration, flow rate, and temperature was investigated, in order to find the best conditions for COD and colour removal. It was found that, during oxidation, a polymeric film, causing BDD deactivation, was formed in the potential region of water stability, and that it was removed by anodic polarisation at high potentials in the region of O(2) evolution. Bulk electrolysis results showed that the electrochemical process was suitable for completely removing COD and effectively decolourising wastewaters, due to the production of hydroxyl radicals on the diamond surface. In particular, under optimal experimental conditions of flow rates (i.e. 300 dm(3) h(-1)) and current density (i.e. 20 mA cm(-2)), 97% of COD was removed in 12h electrolysis, with 70 kWh m(-3) energy consumption. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17869416/Removal_of_colour_and_COD_from_wastewater_containing_acid_blue_22_by_electrochemical_oxidation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01180-6 DB - PRIME DP - Unbound Medicine ER -