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Application of Anodic Oxidation in Diazinon Degradation

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Abstract

Diazinon, an organophosphorus pesticide, widely used in agricultural activities, can be effectively degraded in aqueous solutions via advanced oxidation processes. Electrochemical oxidation is a promising technique for the degradation of recalcitrant organic micropollutants in water. Thus, this study evaluated the pesticide diazinon degradation by anodic oxidation. To carry out the experiments, a synthetic solution of diazinon was used, with an initial concentration of 40 mg L−1. Two types of electrodes were evaluated, a dimensionally stable anode type, with RuO2–IrO2 composition, and a boron-doped diamond (BDD) electrode. In addition, two supporting electrolytes (NaCl and Na2SO4), the electrolyte concentration, current density and also energy consumption were evaluated. All configurations were able to promote the degradation of total organic carbon. The anodic oxidation for the degradation of diazinon was more efficient with the BDD electrode, reaching 97.5% of diazinon removal after 180 min with 25 mM of Na2SO4, a current density of 42 mA cm−2 and pH 3.

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Data Availability

The data that support the findings of this study are available from the corresponding author, N.U.Y., upon reasonable request.

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Acknowledgements

The authors would like to thank the Universidade Tiradentes (UNIT), the Instituto de Tecnologia e Pesquisa (ITP), the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), the Financiadora de Estudos e Projetos (FINEP), the Laboratório de Tratamento de Resíduos e Efluentes (LTRE/ITP) and the Instituto Cesumar de Ciência e Tecnologia (ICETI/UNICESUMAR) for their financial support.

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Correspondence to Natália Ueda Yamaguchi.

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Santos, T.M., Marques, M.N., de Alsina, O.L.S. et al. Application of Anodic Oxidation in Diazinon Degradation. Water Air Soil Pollut 233, 415 (2022). https://doi.org/10.1007/s11270-022-05895-0

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  • DOI: https://doi.org/10.1007/s11270-022-05895-0

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