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@Article{SantosLanzFerrBald:2016:BoDiEl,
               author = "Santos, Nazir Monteiro dos and Lanza, Marcos Roberto de 
                         Vasconcelos and Ferreira, Neiden{\^e}i Gomes and Baldan, 
                         Maur{\'{\i}}cio Ribeiro",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Boron-doped diamond electrodes for carbofuran electrochemical 
                         degradation",
              journal = "Revista Brasileira de Aplica{\c{c}}{\~o}es de V{\'a}cuo",
                 year = "2016",
               volume = "35",
               number = "1",
                pages = "17--24",
                month = "jan./abr.",
             keywords = "Ti/BDD electrodes, Electrochemical oxidation, Carbofuran 
                         pesticide, Eletrodos de Ti/BDD, Oxida{\c{c}}{\~a}o 
                         eletroqu{\'{\i}}mica, Pesticida carbofurano.",
             abstract = "Boron-doped diamond electrodes (BDD) were produced on titanium 
                         (Ti) substrate by Hot Filament Chemical Vapor Deposition (HFCVD) 
                         reactor for electrochemical degradation of carbofuran pesticide. 
                         The morphological and structural characterizations of the 
                         electrodes were evaluated by Scanning Electron Microscopy (SEM) 
                         and by Raman scattering Spectroscopy techniques. The apparent 
                         space charge density (NA) value was determined by Mott-Schottky 
                         Plot, in which was approximately 1019 cm-3. The electrochemical 
                         characterization of electrodes was performed by Cyclic 
                         Voltammetry, and it was observed large potential windows. The 
                         electrochemical oxidation (EO) of the carbofuran were performed at 
                         different current densities, flow rates of 50 and 300 Lh-1 for a 
                         total of 2 hours with an electrolyte 0.1 M potassium sulfate (K2 
                         SO4 ) aqueous solutions and 1,8 x 10-3 M carbofuran in a flow 
                         reactor with recirculation. The efficiency of the pesticide 
                         degradation process was monitored by Ultraviolet-Visible 
                         Spetrophotometry (UVVis), Total Organic Carbon (TOC) and High 
                         Performance Liquid Chromatography (HPLC) techniques. The obtained 
                         results show that boron doped diamond on titanium substrate 
                         (Ti/BDD) anodes are promising for electrochemical treatment in the 
                         wastewater. The reducing the TOC concentration, promoted a 
                         breakdown of the carbofuran molecule, showing inorganic carbon 
                         (CO2, CO, H3 CNH2) formation, rather than the mineralization of 
                         organic compounds. This fact may have contributed to the 
                         intermediate products formation resulting from the reaction of 
                         degradation of the pesticide. RESUMO: Eletrodos de diamante dopado 
                         com boro (BDD) foram produzidos sobre substrato de tit{\^a}nio 
                         (Ti) por deposi{\c{c}}{\~a}o qu{\'{\i}}mica a partir da fase 
                         vapor assistida por filamento quente (HFCVD) para 
                         degrada{\c{c}}{\~a}o eletroqu{\'{\i}}mica do pesticida 
                         carbofurano. As caracteriza{\c{c}}{\~o}es morfol{\'o}gica e 
                         estrutural dos eletrodos foram analisadas por Microscopia 
                         Eletr{\^o}nica de Varredura (SEM) e Espectroscopia Raman. O valor 
                         da densidade de carga aparente (NA) foi determinado por 
                         Mott-Schottky Plot, nos quais foram de aproximadamente 1019 cm-3. 
                         A caracteriza{\c{c}}{\~a}o eletroqu{\'{\i}}mica dos eletrodos 
                         foi realizada por Voltametria C{\'{\i}}clica e observada ampla 
                         janela de potencial. A oxida{\c{c}}{\~a}o eletroqu{\'{\i}}mica 
                         do carbofurano foi realizado em diferentes densidades de corrente, 
                         com fluxo de 50 e 300 Lh-1 durante 2 horas com uma 
                         solu{\c{c}}{\~a}o aquosa de carbofurano com 
                         concentra{\c{c}}{\~a}o de 1.8 x 10-3 M dissolvido em Sulfato de 
                         pot{\'a}ssio (K2 SO4 ) 0.1 M utilizando um reator de fluxo com 
                         recircula{\c{c}}{\~a}o. A efici{\^e}ncia do processo de 
                         degrada{\c{c}}{\~a}o do pesticida foi avaliada pelas 
                         t{\'e}cnicas de Espectrofotometria nas regi{\~o}es Ultravioleta 
                         e Vis{\'{\i}}vel (UV-Vis), Carbono Org{\^a}nico Total (TOC) e 
                         Cromatografia Liquida de Alta Efici{\^e}ncia (HPLC). Os 
                         resultados obtidos mostraram que os anodos de diamante dopado com 
                         boro em substratos de tit{\^a}nio (Ti/BDD) s{\~a}o promissores 
                         para tratamento eletroqu{\'{\i}}mico em {\'a}guas residuais. A 
                         redu{\c{c}}{\~a}o da concentra{\c{c}}{\~a}o de TOC promoveu a 
                         quebra das mol{\'e}culas do carbofurano, com forma{\c{c}}{\~a}o 
                         de carbono inorg{\^a}nico (CO2 , CO, H3 CNH2 ), ao inv{\'e}s da 
                         mineraliza{\c{c}}{\~a}o dos compostos org{\^a}nicos. Esse fato 
                         pode ter contribu{\'{\i}}do para a forma{\c{c}}{\~a}o de 
                         compostos intermedi{\'a}rios como resultado da rea{\c{c}}{\~a}o 
                         de degrada{\c{c}}{\~a}o do pesticida.",
                  doi = "10.17563/rbav.v35i1.1002",
                  url = "http://dx.doi.org/10.17563/rbav.v35i1.1002",
                 issn = "0101-7659",
             language = "en",
           targetfile = "santos_boron.pdf",
        urlaccessdate = "29 nov. 2020"
}


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