Carbon Paste Electrodes Obtained from Organic Waste After a Biodrying Process and Validation in an Electro-Fenton System Towards Alternative Valorization

Autor(es)

A. Z. Vela-Carrillo ^[1] ; Luis A. Godínez ^[2] ; J. D. García-Espinoza ^[3] ; R. J. Martínez ^[4] ; M. O. Franco-Hernández ^[5] ; A. B. Piña-Guzman ^[6] ; M. C. Santos ^[7] ; F. Robles-Martínez ^[8] ; I. Robles ^[9]

Afiliação do(s) autor(es)

^[1] Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C - México

^[2] Universidad Autónoma de Querétaro. Facultad de Química - México

^[3] Universidad Autónoma de Querétaro. Facultad de Química - México

^[4] Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C - México

^[5] Instituto Politécnico Nacional. Unidad Profesional Interdisciplinaria de Biotecnología - México

^[6] Instituto Politécnico Nacional. Unidad Profesional Interdisciplinaria de Biotecnología - México

^[7] Federal University of ABC. Center for Natural and Human Sciences - Brasil

^[8] Instituto Politécnico Nacional. Unidad Profesional Interdisciplinaria de Biotecnología - México

^[9] Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C - México

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Mexican Chemical Society; v. 67, n. 4, p. 359-370, 2024-04-26.

Resumo

Abstract. The transformation of agricultural waste into activated carbon represents an attractive approach as new and alternative source, but also as a reduction of pollution associated to the degradation of precursors. The organic residues sugarcane (Saccharum officinarum) bagasse-shell, orange (Citrus sinensis) peel-bagasse, and eucalyptus (Eucalyptus globulus) leaves, obtained from a biodrying process were transformed into activated carbons using phosphoric acid as activating agent. The resulting materials were physicochemically characterized and after that, carbonaceous electrodes were prepared to test the feasibility of using them in a discoloration electro-Fenton wastewater treatment process. Orange peel-bagasse biodried precursor transformed into activated carbon showed the highest efficiency when used as the modifier in a carbon paste electrode due to its highest porosity, electroactive area (24.9x10-2 cm2), and roughness (1.21 a.u.), also to its chemical affinity for anionic molecules. These properties, in addition to the capability of electro-sorb iron ions on the surface during the Fenton reaction, allowed a 44 % methyl orange discoloration efficiency. Sugarcane bagasse-peel and eucalyptus leaves biodried residues were also evaluated with efficiencies under 30 %, mainly attributed to intrinsic composition of the precursor materials. (AU)

• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático