Lixiviation of copper content in pcb computer cards for the extraction of precious metals
The recovery of gold and silver from electronic waste is a friendly alternative to the environment that can complement the industrial production of them, usually obtained from natural ores and also to promote the reduction of such waste1. As a step prior to the recovery of these metals it is necessa...
| Main Authors: | , |
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| Format: | Online |
| Language: | spa |
| Published: |
Universidad Pedagógica y Tecnológica de Colombia - UPTC
2018
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| Subjects: | |
| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/11873 |
| _version_ | 1801706689433436160 |
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| author | Jiménez Tovar, Ginna Alejandra Parra Pinilla, Mario |
| author_facet | Jiménez Tovar, Ginna Alejandra Parra Pinilla, Mario |
| author_sort | Jiménez Tovar, Ginna Alejandra |
| collection | OJS |
| description | The recovery of gold and silver from electronic waste is a friendly alternative to the environment that can complement the industrial production of them, usually obtained from natural ores and also to promote the reduction of such waste1. As a step prior to the recovery of these metals it is necessary to extract the copper contained in them and thus achieve a greater recovery. In the present study, the extraction2 of copper was analyzed from PCB computer cards. It began with a characterization of the metals of interest to then study their behavior in the dissolution process. Next, a process of leaching with inorganic acids was carried out at ambient conditions for six hours and mechanical agitation of 300 RPM. At the end, leaching was chosen with the highest percentage of copper extracted and a characterization of the waste was made showing that the copper content decreased from 27.09% to 1.48%. Likewise, the concentration of gold varied from 131.29 g / ton to 345.9 g / ton and that of silver from 310 g / ton to 864.8 g / ton. To verify the copper cleaning process, a leaching process was carried out with thiourea solutions, obtaining results of 74.79% and 64.8% for silver and gold, respectively. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-11873 |
| institution | Revista Ingeniería, Investigación y Desarrollo |
| language | spa |
| publishDate | 2018 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia - UPTC |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-118732022-06-16T16:45:10Z Lixiviation of copper content in pcb computer cards for the extraction of precious metals Lixiviación de cobre contenido en tarjetas de computador PCB para la extracción de metales preciosos Jiménez Tovar, Ginna Alejandra Parra Pinilla, Mario inorganic acid copper cleaning leaching PCB ácidos inorgánicos cobre limpieza lixiviación PCB The recovery of gold and silver from electronic waste is a friendly alternative to the environment that can complement the industrial production of them, usually obtained from natural ores and also to promote the reduction of such waste1. As a step prior to the recovery of these metals it is necessary to extract the copper contained in them and thus achieve a greater recovery. In the present study, the extraction2 of copper was analyzed from PCB computer cards. It began with a characterization of the metals of interest to then study their behavior in the dissolution process. Next, a process of leaching with inorganic acids was carried out at ambient conditions for six hours and mechanical agitation of 300 RPM. At the end, leaching was chosen with the highest percentage of copper extracted and a characterization of the waste was made showing that the copper content decreased from 27.09% to 1.48%. Likewise, the concentration of gold varied from 131.29 g / ton to 345.9 g / ton and that of silver from 310 g / ton to 864.8 g / ton. To verify the copper cleaning process, a leaching process was carried out with thiourea solutions, obtaining results of 74.79% and 64.8% for silver and gold, respectively. La recuperación de oro y plata desde residuos electrónicos es una alternativa amigable con el medio ambiente que puede complementar la producción industrial de ellos, usualmente obtenidos a partir de menas naturales y también para promover la reducción de dichos residuos. Como paso previo a la recuperación de estos metales es necesario extraer el cobre contenido en ellos y lograr así una mayor recuperación. En el presente estudio se analizó la extracción de cobre a partir de tarjetas de computador PCB. Se inició con una caracterización de los metales de interés para luego estudiar su comportamiento en el proceso de disolución. A continuación, se realizó un proceso de lixiviación con ácidos inorgánicos a condiciones ambientales durante seis horas y agitación mecánica de 300 RPM. Al finalizar, se eligió la lixiviación con mayor porcentaje de cobre extraído y se hizo una caracterización de los residuos donde se muestra que el contenido de cobre disminuyó desde 27,09% hasta 1.48%. Así mismo, la concentración de oro varió desde 131,29 g/ton hasta 345,9g/ton y la de la plata desde 310 g/ton hasta 864,8 g/ton. Para comprobar el proceso de limpieza de cobre se llevo a cabo un proceso de lixiviación con soluciones de tiourea obteniéndose resultados de 60,9% y 96,06% para plata y oro, respectivamente. Universidad Pedagógica y Tecnológica de Colombia - UPTC 2018-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/11873 10.19053/1900771X.v18.n2.2018.11873 Ingeniería Investigación y Desarrollo; Vol. 18 No. 2 (2018): Ingeniería, Investigación y Desarrollo; 15-21 Ingeniería Investigación y Desarrollo; Vol. 18 Núm. 2 (2018): Julio - Diciembre; 15-21 2422-4324 1900-771X spa https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/11873/9757 |
| spellingShingle | inorganic acid copper cleaning leaching PCB ácidos inorgánicos cobre limpieza lixiviación PCB Jiménez Tovar, Ginna Alejandra Parra Pinilla, Mario Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title | Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title_alt | Lixiviación de cobre contenido en tarjetas de computador PCB para la extracción de metales preciosos |
| title_full | Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title_fullStr | Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title_full_unstemmed | Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title_short | Lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| title_sort | lixiviation of copper content in pcb computer cards for the extraction of precious metals |
| topic | inorganic acid copper cleaning leaching PCB ácidos inorgánicos cobre limpieza lixiviación PCB |
| topic_facet | inorganic acid copper cleaning leaching PCB ácidos inorgánicos cobre limpieza lixiviación PCB |
| url | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/11873 |
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