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J Environ Manage

Title:		Electrodegradation of the Acid Green 28 dye using Ti/beta-PbO2 and Ti-Pt/beta-PbO2 anodes
Author(s):		Irikura K; Bocchi N; Rocha-Filho RC; Biaggio SR; Iniesta J; Montiel V;
Address:		"Departamento de Quimica, Universidade Federal de Sao Carlos, C.P. 676, 13560-970 Sao Carlos, SP, Brazil. Departamento de Quimica, Universidade Federal de Sao Carlos, C.P. 676, 13560-970 Sao Carlos, SP, Brazil. Electronic address: bocchi@ufscar.br. Departamento de Quimica Fisica, Instituto Universitario de Electroquimica, Facultad de Ciencias, Universidad de Alicante, Apartado de Correos 99, E-03080 Alicante, Spain"
Journal Title:		J Environ Manage
Year:		2016
Volume:		20160904
Issue:
Page Number:		306 - 313
DOI:		10.1016/j.jenvman.2016.08.061
ISSN/ISBN:		1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:		"The statistical Response Surface Methodology (RSM) is applied to investigate the effect of different parameters (current density, j, NaCl concentration, [NaCl], pH, and temperature, theta) and their interactions on the electrochemical degradation of the Acid Green (AG) 28 dye using a Ti/beta-PbO2 or Ti-Pt/beta-PbO2 anode in a filter-press reactor. LC/MS is employed to identify intermediate compounds. For both anodes, the best experimental conditions are j = 50 mA cm(-2), [NaCl] = 1.5 g L(-1), pH = 5, and theta = 25 degrees C. After 3 h of electrolysis, a dye solution treated under these conditions presents the following parameters: electric charge per unit volume of the electrolyzed solution required for 90% decolorization (Q(90)) of 0.34-0.37 A h L(-1), %COD removal of approximately 100%, specific energy consumption of 18-20 kW h m(-3), and %TOC removal of 32-33%. No loss of the beta-PbO2 film is observed during all the experiments. The beta-PbO2 films present excellent stability for solutions with pH >/= 5 ([Pb(2+)] < 0.5 mg L(-1)). Chloroform is the only volatile organic halo compound present in the treated solution under those optimized conditions. Hydroxylated anthraquinone derivatives, aromatic chloramines, and naphthoquinones are formed during the electrolyses. The Ti/beta-PbO2 and Ti-Pt/beta-PbO2 anodes show significantly better performance than a commercial DSA anode for the electrochemical degradation of the AG 28 dye. The Ti/beta-PbO2 anode, prepared as described in this work, is an excellent option for the treatment of textile effluents because of its low cost of fabrication and good performance"
Keywords:		Electrochemistry Electrodes Electrolysis Hydrogen-Ion Concentration Industrial Waste/analysis Lead/*chemistry Lissamine Green Dyes/*chemistry Oxides/*chemistry Textiles Titanium/*chemistry Chlorine-mediated oxidation Electrochemical oxidation Lead dioxide;
Notes:		"MedlineIrikura, Kallyni Bocchi, Nerilso Rocha-Filho, Romeu C Biaggio, Sonia R Iniesta, Jesus Montiel, Vicente eng England 2016/09/09 J Environ Manage. 2016 Dec 1; 183:306-313. doi: 10.1016/j.jenvman.2016.08.061. Epub 2016 Sep 4"