@Article{SouzaRocFerRodLan:2019:EfCoHy,
               author = "Souza, F. L. and Rocha, R. S. and Ferreira, Neiden{\^e}i Gomes 
                         and Rodrigo, M. A. and Lanza, M. R. V.",
          affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidad de Castilla} and {Universidade 
                         de S{\~a}o Paulo (USP)}",
                title = "Effects of coupling hybrid processes on the treatment of 
                         wastewatercontaining a commercial mixture of diuron and hexazinone 
                         herbicides",
              journal = "Electrochimica Acta",
                 year = "2019",
               volume = "328",
                pages = "e135013",
                month = "Dec.",
             keywords = "Herbicides, Electrochemical oxidation, Electro-Fenton, 
                         Photoelectro-Fenton, Boron-doped diamond, Oxygen-diffusion 
                         cathode.",
             abstract = "This work evaluates the effects of coupling Conductive Diamond 
                         Electrochemical Oxidation (CDEO) with electrogenerated peroxide 
                         (CDEO-H2O2), iron (II) catalyst (electro-Fenton, EF) and UV 
                         irradiation (photoelectron-Fenton, PEF) techniques for the 
                         treatment of wastewater containing a commercial mixture of Diuron 
                         and Hexazinone herbicides. Although the techniques employed in 
                         this study exhibited significant differences in terms of current 
                         charge, energy consumption and amounts of byproducts formed, they 
                         have shown to be capable of degrading and mineralizing both 
                         herbicides (Diuron and Hexazinone). The application of 
                         electrooxidation technique with and without hydrogen peroxide 
                         generation led to the oxidation of both herbicides, where removal 
                         rates ranging from 74% to 99% and 77%92% were obtained for 
                         Hexazinone and Diuron, respectively. Hexazinone and Diuron were 
                         completely removed after 90 min in the EF process. PEF was found 
                         to be the most efficient technique for having drastically reduced 
                         the time for complete degradation of the herbicides, although 25% 
                         of organic carbon remained in solution after 120 min of 
                         electrolysis. Higher rates of herbicides degradation were obtained 
                         in this order: PEF > EF > CDEO/H2O2/UV > CDEO/H2O2 > CDEO > UV. 
                         The result indicates that the production of oxidants is promoted 
                         by the hybrid processes, and this leads to an improvement in the 
                         oxidation of the pollutants. The synergistic coefficient obtained 
                         for the coupled techniques were higher than one in terms of both 
                         herbicides degradation and Total Organic Carbon (TOC) removal. Two 
                         important sub-products of reaction were identified, and their 
                         degradation route is in agreement with the reports published in 
                         the literature. Essentially, this work draws attention to the 
                         synergistic effect caused by the coupling of techniques involving 
                         the treatment of chemical agents in wastewater and sheds light on 
                         how to use this coupling technique for the development of more 
                         efficient treatment processes.",
                  doi = "10.1016/j.electacta.2019.135013",
                  url = "http://dx.doi.org/10.1016/j.electacta.2019.135013",
                 issn = "0013-4686",
             language = "en",
           targetfile = "souza_effects.pdf",
        urlaccessdate = "28 abr. 2024"
}