Lixiviación eficiente de Cu, Ni y Zn en PCBs, utilizando un sistema de ácido sulfúrico-ozono
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https://doi.org/10.29057/aactm.v12i12.15257Palabras clave:
Chatarra electrónica, lixiviación, ácido sulfúrico-ozono, energías de activación, orden de reacción, difusión, Cu, Ni, ZnResumen
El acelerado consumo de bienes actualmente, ha incrementado la cantidad de desechos en el mundo, especialmente desechos electrónicos, lo cual hace del reuso y reciclaje un factor importante para remediar la contaminación. Este estudio investiga la lixiviación de residuos de chatarra electrónica en medio H2SO4-O3. Los resultados muestran que la cinética de lixiviación de Cu, Ni y Zn está controlada por la difusión. Los valores de energía de activación (Ea) son 0.815, 3.42 y 0.171 kJ/mol para Cu, Ni y Zn, respectivamente. De igual modo, los órdenes de reacción son prácticamente 0 para los tres metales (-0.049 Cu, 0.14 Ni, y -0.0181 Zn), sugiriendo que la reacción es fácil de iniciar y puede ser controlada por difusión o por un paso limitante que no involucra la concentración de los reactantes. Por lo tanto, estos resultados indican que la lixiviación es un proceso eficiente para recuperar metales contenidos en residuos de la chatarra electrónica. Las máximas recuperaciones encontradas, fueron de 96.5 % de Cu, 98.67 % de Ni y 98.10 % de Zn.
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Derechos de autor 2025 Carlos Orlando Gama Juárez, Ramón Guillem Salinas Maldonado, Alondra García Cerón, Javier Flores Badillo, Juan Hernández-Ávila, Manuel Saldana

Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial-SinDerivadas 4.0.