@Article{VasconcelosRMASBFL:2015:ElReRe,
               author = "Vasconcelos, Vanessa Moura and Ribeiro, Francine L. and 
                         Migliorini, Fernanda Lanzoni and Alves, Suellen A. and Steter, 
                         Juliana A. and Baldan, Maur{\'{\i}}cio Ribeiro and Ferreira, 
                         Neiden{\^e}i Gomes and Lanza, Marcos R. V.",
          affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Centro 
                         Universit{\'a}rio Central Paulista} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal de S{\~a}o 
                         Carlos (UFSCar)} and {Universidade de S{\~a}o Paulo (USP)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade de 
                         S{\~a}o Paulo (USP)}",
                title = "Electrochemical removal of Reactive Black 5 azo dye using 
                         non-commercial boron-doped diamond film anodes",
              journal = "Electrochimica Acta",
                 year = "2015",
               volume = "178",
                pages = "484--493",
                month = "Oct.",
             keywords = "Boron-doped diamond electrode, Degradation route, 
                         Electro-oxidation, Reactive Black 5 dye.",
             abstract = "Although various processes for the removal of Reactive Black 5 
                         (RB5) dye from textile wastewater have been studied, the 
                         degradation pathway of RB5 on boron-doped diamond (BDD) films has 
                         not been elucidated. We here report the efficient 
                         electro-oxidation of RB5 in aqueous solution using BDD/Ti 
                         electrodes and we propose a degradation route based on 
                         intermediates and byproducts identified by high performance liquid 
                         chromatography-mass spectrometry. BDD films doped with 5000 or 
                         15,000 ppm of B were grown on Ti plates using the hot filament 
                         chemical vapor technique to produce electrodes E1 and E2, 
                         respectively. Films were evaluated by scanning electron 
                         microscopy, X-ray diffraction and Raman spectroscopy before and 
                         after several hours of electrolysis and were shown to be of high 
                         quality and stability. Total removal of color from RB5 solution 
                         was achieved with either electrode by electrolysis at low current 
                         density (50 mA cm\−2). Total mineralization of the dye 
                         solution could be attained with electrode E2 at an applied current 
                         density of 100 mA cm\−2. Under these conditions, 91% of the 
                         chromatographic area associated with RB5 (monitored at 311 nm) was 
                         removed, thereby verifying cleavage of the aromatic rings of the 
                         dye. Furthermore decolorization of RB5 followed pseudo zero-order 
                         kinetics with both electrodes and the apparent rate constant was 
                         higher with electrode E2. The results obtained indicate that 
                         BDD/Ti is a promising material for the electro-degradation of RB5 
                         since aromatic rings and chromophoric groups were ruptured during 
                         electrolysis to generate aliphatic compounds, such as oxalic acid, 
                         that can be easily converted into CO2.",
                  doi = "10.1016/j.electacta.2015.07.133",
                  url = "http://dx.doi.org/10.1016/j.electacta.2015.07.133",
                 issn = "0013-4686",
             language = "en",
           targetfile = "vasconcelos_electrochemical.pdf",
        urlaccessdate = "27 abr. 2024"
}