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Artículo

Catalytic Activity of Carbon Materials in the Oxidation of Minerals

Burbano Patiño, Aura AlejandraIcon ; Gascó, Gabriel; Paz Ferreiro, Jorge; Méndez, Ana
Fecha de publicación: 19/08/2022
Editorial: Multidisciplinary Digital Publishing Institute
Revista: Catalysts
e-ISSN: 2073-4344
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Química Inorgánica y Nuclear

Resumen

This study aims to advance the knowledge of using carbon materials as catalysts in the oxidation of chalcopyrite. For this, two different materials (a commercial activated carbon (CC) and commercial biochar (BC)) were added to chalcopyrite ore (CPY) at three weight ratios (1:1, 1:0.5, and 1:0.25). Mixtures were treated with sulfuric/ferric solution for 96 h at 90 °C. Experimental results showed that extraction of copper from CPY was around 36%, increasing to higher than 90% with the addition of CC or BC at the proper ratio. The best result (99.1% Cu extraction) was obtained using a 1:1 ratio of CPY:CC. Analysis of solid residues shows that CC, with a high surface area, adsorbs sulfur onto its surface, limiting elemental sulfur formation. Additionally, the treatment of CPY in the CC’s presence transforms the chalcopyrite into CuS. Sulfur adsorption or CuS formation was not observed after the leaching of chalcopyrite with BC. However, the addition of BC to CPY at a ratio of 1:0.25 also increased the extraction of copper to 91.1%. Two carbon materials were oxidized after treatment with a sulfuric/ferric solution, and BC probably displayed catalytic properties in the leaching medium.
Palabras clave: ACTIVATED CARBON , BIOCHAR , CATALYST , CHALCOPYRITE , OXIDATION
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/204366
DOI: http://dx.doi.org/10.3390/catal12080918
URL: https://www.mdpi.com/2073-4344/12/8/918
Colecciones
Articulos(INQUISUR)
Articulos de INST.DE QUIMICA DEL SUR
Citación
Burbano Patiño, Aura Alejandra; Gascó, Gabriel; Paz Ferreiro, Jorge; Méndez, Ana; Catalytic Activity of Carbon Materials in the Oxidation of Minerals; Multidisciplinary Digital Publishing Institute; Catalysts; 12; 8; 19-8-2022; 1-15
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