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The Influence of the Configuration of Two Electrochemical Reactors on the Process of Removing Atrazine from Water

2021; Multidisciplinary Digital Publishing Institute; Volume: 13; Issue: 9 Linguagem: Inglês

10.3390/su13095267

2071-1050

Juan Nápoles-Armenta, Juan Antonio Vidales-Contreras, Luis Alonso Leyva-Soto, Edna R. Meza‐Escalante, Lourdes Mariana Díaz-Tenorio, Celestino García‐Gómez, Edgardo Martínez-Orozco, Celia De la Mora Orozco, Pablo Gortáres‐Moroyoqui, Lilian Alejandra Salcedo-Gastelum,

Advanced oxidation water treatment

In Mexico, atrazine is widely used in agriculture to control broadleaf weeds. The objective of this research was to compare atrazine removal in water and energy consumption between an up-flow cylinder electro-oxidation reactor (UCER) and an up-flow rectangular electro-oxidation reactor (URER) using the response surface methodology. In each reactor, two titanium (Ti) mesh electrodes (cathodes) and one Titanium-Lead Dioxide (Ti-PbO2) mesh electrode (anode). Current intensity effects, electrolysis treatment time, and recirculation flow were evaluated. Synthetic water with 5 mg/L atrazine content was used. Optimum atrazine removal values were obtained at 2 A electric current, 180 min of treatment time, and 200 mL/min recirculation rate for both reactors: in these conditions an atrazine removal of 77.45% and 76.89% for URER and UCER respectively. However, energy consumption showed a significant difference of 137.45 kWh/m3 for URER and 73.63 kWh/m3 for UCER. Regarding energy efficiency, a 60% atrazine removal was reached in both reactors using less energy for UCER at (1.5 A–135 min–150 mL/min–25.8 kWh/m3) and for URER at (0.66 A–135 min–150 mL/min–20.12 kWh/m3).