Recuperación de oro y metales base a partir de desechos de placas de circuitos impresos

Palabras clave: Recuperación de oro, proceso de lixiviación, recuperación selectiva electroquímica, desechos electrónicos, placas de circuitos impresos

Resumen

Este estudio experimental a escala laboratorio, presenta un novedoso proceso combinado hidrometalúrgico y electrometalúrgico para la recuperación de oro y metales no preciosos (Cu, Ni, Pb y Zn), a partir de desechos de placas de circuitos impresos (DPCI). Primero, se llevo a cabo una lixiviación de los pines de los DPCI y una completa extracción de oro se obtuvo usando H2SO4 0.5 M (pH ≈ 1.5)/O2 (1 atm) en el rango de temperatura de 288 a 343 K. Las energías de activación encontradas muestran valores de 97.2 kJ∙mol-1, 86 kJ∙mol-1 y 93.6 kJ∙mol-1 para Cu, Ni y Zn, respectivamente. Posteriormente, el licor de lixiviación fue tratado electroquímicamente en varias condiciones: la remoción selectiva de Cu y Pb se realizó a PH 1.5, y la remoción de Ni y Zn también se obtuvo cuando el pH aumentó a 5. Todos los procesos involucrados aquí son amigables con el medio ambiente e, incluso el licor final podría ser reutilizado.

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Publicado
2021-12-12
Cómo citar
Salinas-Rodríguez , E., Hernández-Ávila, J., Reyes-Valderrama, M. I., Rodríguez-Lugo, V., Montiel-Hernández, J. F., & Cerecedo-Sáenz, E. (2021). Recuperación de oro y metales base a partir de desechos de placas de circuitos impresos. Pädi Boletín Científico De Ciencias Básicas E Ingenierías Del ICBI, 9(Especial2), 62-71. https://doi.org/10.29057/icbi.v9iEspecial2.7681

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