| Title: | Sustainable integrated process for cogeneration of oxidants for VOCs removal |
| Author(s): | Bueno SA; de Oliveira Santiago Santos G; Oliveira Silva T; Vasconcelos Lanza MR; Balderas Hernandez P; Roa Morales G; Ibanez Cornejo J; Saez C; Rodrigo MA; |
| Address: | "Universidad Autonoma del Estado de Mexico UAEM, Toluca, Mexico; Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Universidad Castilla-La Mancha, Ciudad Real, Spain. Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Universidad Castilla-La Mancha, Ciudad Real, Spain; Sao Carlos Institute of Chemistry, University of Sao Paulo, Sao Carlos, Sao Paulo, 13566-590, Brazil. Electronic address: gessicasantiago@usp.br. Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Universidad Castilla-La Mancha, Ciudad Real, Spain; Sao Carlos Institute of Chemistry, University of Sao Paulo, Sao Carlos, Sao Paulo, 13566-590, Brazil. Sao Carlos Institute of Chemistry, University of Sao Paulo, Sao Carlos, Sao Paulo, 13566-590, Brazil. Universidad Autonoma del Estado de Mexico UAEM, Toluca, Mexico. Universidad Iberoamericana, Mexico City, Mexico. Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Universidad Castilla-La Mancha, Ciudad Real, Spain. Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Universidad Castilla-La Mancha, Ciudad Real, Spain. Electronic address: manuel.rodrigo@uclm.es" |
| DOI: | 10.1016/j.chemosphere.2023.140171 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "This study upgrades the sustainability of environmental electrochemical technologies with a novel approach consisting of the in-situ cogeneration and use of two important oxidants, hydrogen peroxide (H(2)O(2)) and Caro's acid (H(2)SO(5)), manufactured with the same innovative cell. This reactor was equipped with a gas diffusion electrode (GDE) to generate cathodically H(2)O(2), from oxygen reduction reaction, a boron doped diamond (BDD) electrode to obtain H(2)SO(5), via anodic oxidation of dilute sulfuric acid, and a proton exchange membrane to separate the anodic and the cathodic compartment, preventing the scavenging effect of the interaction of oxidants. A special design of the inlet helps this cell to reach simultaneous efficiencies as high as 99% for H(2)O(2) formation and 19.7% for Caro's acid formation, which means that the cogeneration reaches efficiencies over 100% in the uses of electric current to produce oxidants. The two oxidants' streams produced were used with different configurations for the degradation of three volatile organic compounds (benzene, toluene, and xylene) in a batch reactor equipped with a UVC-lamp. Among different alternatives studied, the combination H(2)SO(5)/H(2)O(2) under UVC irradiation showed the best results in terms of degradation efficiency, demonstrating important synergisms as compared to the bare technologies" |
| Keywords: | "*Oxidants Hydrogen Peroxide/chemistry Oxidation-Reduction Electrodes Boron/chemistry Diamond/chemistry *Water Pollutants, Chemical/chemistry Caro's acid: synergisms Hydrogen peroxide Process integration Sustainable processes;" |
| Notes: | "MedlineBueno, Sabrina Ayala de Oliveira Santiago Santos, Gessica Oliveira Silva, Taynara Vasconcelos Lanza, Marcos Roberto Balderas Hernandez, Patricia Roa Morales, Gabriela Ibanez Cornejo, Jorge Saez, Cristina Rodrigo, Manuel Andres eng England 2023/09/16 Chemosphere. 2023 Nov; 342:140171. doi: 10.1016/j.chemosphere.2023.140171. Epub 2023 Sep 13" |
