Electrochemical incineration of glyphosate wastewater using three-dimensional electrode

Autor(es)

Oliveira, Kaique S. G. C. ^[1] ; Farinos, Rosimeire M. ^[1] ; Veroli, Alyne B. ^[1] ; Ruotolo, Luis A. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem Engn, Rod Washington Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL TECHNOLOGY; JUN 2019.
• Citações Web of Science: 0

Resumo

Anodic oxidation of recalcitrant organic compounds is still challenging concerning to the anode material and mass transport limitations imposed by the low concentration. In this work, we studied the degradation of a real wastewater containing glyphosate using an electrode of PbO2 electrodeposited on a three-dimensional matrix of reticulated vitreous carbon (RVC). The high mass transfer rate provided by the RVC/PbO2 anode is demonstrated. A Box-Behnken factorial design was used for a systematic analysis of the effects of current density, flow rate and temperature on the degradation and mineralisation kinetics, current efficiency and specific energy consumption. The optimised degradation performance was achieved applying 30 mA cm(-2), 3000 mL min(-1) and 50 degrees C. As the flow rate increases from 150 to 1500 mL min(-1), the current efficiency increases from 18% to 65% and the energy consumption dropped from 72 to 33 kWh kg(-1) due to the mass transfer enhancement promoted by the porous matrix. The efficacy of the electrochemical process for the treatment of real effluents using the three-dimensional PbO2 has been demonstrated. (AU)

• Processo FAPESP: 12/04168-0 - Degradação eletroquímica de compostos orgânicos poluentes utilizando eletrodo tridimensional de CVR/PbO2
• Beneficiário: Luis Augusto Martins Ruotolo
• Linha de fomento: Auxílio à Pesquisa - Regular