Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study
ABSTRACT: The electrochemical behavior of ammoniacal thiosulfate solutions (S2O3 2-- NH3-Cu2+ -EDTA) has been studied for varying electrolyte compositions in the gold electro-dissolution. A gold rotating disk electrode (RDE) was employed to measure anodic and cathodic polarization curves in alkaline...
- Autores:
-
Calderón Gutiérrez, Jorge Andrés
Ramírez Sánchez, Carolina
Tamayo Sepúlveda, José Adrián
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2024
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/44147
- Acceso en línea:
- https://hdl.handle.net/10495/44147
- Palabra clave:
- Amoníaco
Ammonia
Análisis electroquímico
Electrochemical analysis
Lixiviación
Leaching
Ingeniería química
Chemical engineering
Procesos químicos
Chemical processes
Reacciones químicas
Chemical reactions
Electrolitos
Electrolytes
Electrodisolución de oro
Reducción de oxígeno
- Rights
- openAccess
- License
- https://creativecommons.org/licenses/by-nc-nd/4.0/
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| dc.title.spa.fl_str_mv |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| title |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| spellingShingle |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study Amoníaco Ammonia Análisis electroquímico Electrochemical analysis Lixiviación Leaching Ingeniería química Chemical engineering Procesos químicos Chemical processes Reacciones químicas Chemical reactions Electrolitos Electrolytes Electrodisolución de oro Reducción de oxígeno |
| title_short |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| title_full |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| title_fullStr |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| title_full_unstemmed |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| title_sort |
Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study |
| dc.creator.fl_str_mv |
Calderón Gutiérrez, Jorge Andrés Ramírez Sánchez, Carolina Tamayo Sepúlveda, José Adrián |
| dc.contributor.author.none.fl_str_mv |
Calderón Gutiérrez, Jorge Andrés Ramírez Sánchez, Carolina Tamayo Sepúlveda, José Adrián |
| dc.contributor.researchgroup.spa.fl_str_mv |
Centro de Investigación Innovación y Desarrollo de Materiales (CIDEMAT) |
| dc.subject.lemb.none.fl_str_mv |
Amoníaco Ammonia Análisis electroquímico Electrochemical analysis Lixiviación Leaching Ingeniería química Chemical engineering Procesos químicos Chemical processes Reacciones químicas Chemical reactions Electrolitos Electrolytes |
| topic |
Amoníaco Ammonia Análisis electroquímico Electrochemical analysis Lixiviación Leaching Ingeniería química Chemical engineering Procesos químicos Chemical processes Reacciones químicas Chemical reactions Electrolitos Electrolytes Electrodisolución de oro Reducción de oxígeno |
| dc.subject.proposal.spa.fl_str_mv |
Electrodisolución de oro Reducción de oxígeno |
| description |
ABSTRACT: The electrochemical behavior of ammoniacal thiosulfate solutions (S2O3 2-- NH3-Cu2+ -EDTA) has been studied for varying electrolyte compositions in the gold electro-dissolution. A gold rotating disk electrode (RDE) was employed to measure anodic and cathodic polarization curves in alkaline thiosulfate solutions. Potentiodynamic polarization showed how thiosulfate, ammonia, and copper concentration influence the cathodic and anodic behavior of the electrolyte. Likewise, the influence of oxygen on the electrochemical behavior system was evi denced from the analysis of polarization curves, and using Koutecky – Levich equation (slope of 59.60 mV/ decade), it was possible to determine the peroxide pathway for oxygen reduction reaction (ORR) with twoelectron transference. Additionally, gold dissolution and thiosulfate degradation were evaluated using the gold foil leaching tests. It was found solutions with a 0.2 mol l -1 thiosulfate concentration favored the dissolution of gold and by maintaining an adequate ratio between thiosulfate/ammonium (1:3) or thiosulfate/copper (4:1) enable the attainment high gold dissolution and lower degradation of thiosulfate. |
| publishDate |
2024 |
| dc.date.accessioned.none.fl_str_mv |
2024-12-17T17:16:20Z |
| dc.date.available.none.fl_str_mv |
2024-12-17T17:16:20Z |
| dc.date.issued.none.fl_str_mv |
2025 |
| dc.type.spa.fl_str_mv |
Artículo de investigación |
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http://purl.org/coar/resource_type/c_2df8fbb1 |
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https://purl.org/redcol/resource_type/ART |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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José A. Tamayo, Carolina Ramírez-Sanchez, Jorge A. Calderon. Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study. Electrochimica Acta 510 (2025) 145359 https://doi.org/10.1016/j.electacta.2024.145359 |
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0013-4686 |
| dc.identifier.uri.none.fl_str_mv |
https://hdl.handle.net/10495/44147 |
| dc.identifier.doi.none.fl_str_mv |
10.1016/j.electacta.2024.145359 |
| identifier_str_mv |
José A. Tamayo, Carolina Ramírez-Sanchez, Jorge A. Calderon. Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study. Electrochimica Acta 510 (2025) 145359 https://doi.org/10.1016/j.electacta.2024.145359 0013-4686 10.1016/j.electacta.2024.145359 |
| url |
https://hdl.handle.net/10495/44147 |
| dc.language.iso.spa.fl_str_mv |
eng |
| language |
eng |
| dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
Electrochim. Acta. |
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11 |
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1 |
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510 |
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Electrochimica Acta |
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openAccess |
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11 páginas |
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application/pdf |
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Elsevier International Society of Electrochemistry (ISE) |
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Nueva York, Estados Unidos |
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Universidad de Antioquia |
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Calderón Gutiérrez, Jorge AndrésRamírez Sánchez, CarolinaTamayo Sepúlveda, José AdriánCentro de Investigación Innovación y Desarrollo de Materiales (CIDEMAT)2024-12-17T17:16:20Z2024-12-17T17:16:20Z2025José A. Tamayo, Carolina Ramírez-Sanchez, Jorge A. Calderon. Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical study. Electrochimica Acta 510 (2025) 145359 https://doi.org/10.1016/j.electacta.2024.1453590013-4686https://hdl.handle.net/10495/4414710.1016/j.electacta.2024.145359ABSTRACT: The electrochemical behavior of ammoniacal thiosulfate solutions (S2O3 2-- NH3-Cu2+ -EDTA) has been studied for varying electrolyte compositions in the gold electro-dissolution. A gold rotating disk electrode (RDE) was employed to measure anodic and cathodic polarization curves in alkaline thiosulfate solutions. Potentiodynamic polarization showed how thiosulfate, ammonia, and copper concentration influence the cathodic and anodic behavior of the electrolyte. Likewise, the influence of oxygen on the electrochemical behavior system was evi denced from the analysis of polarization curves, and using Koutecky – Levich equation (slope of 59.60 mV/ decade), it was possible to determine the peroxide pathway for oxygen reduction reaction (ORR) with twoelectron transference. Additionally, gold dissolution and thiosulfate degradation were evaluated using the gold foil leaching tests. It was found solutions with a 0.2 mol l -1 thiosulfate concentration favored the dissolution of gold and by maintaining an adequate ratio between thiosulfate/ammonium (1:3) or thiosulfate/copper (4:1) enable the attainment high gold dissolution and lower degradation of thiosulfate.Universidad de AntioquiaColombia. Ministerio de Ciencia, Tecnología e Innovación - MinCienciasCOL000792711 páginasapplication/pdfengElsevierInternational Society of Electrochemistry (ISE)Nueva York, Estados Unidoshttps://creativecommons.org/licenses/by-nc-nd/4.0/http://creativecommons.org/licenses/by-nc-nd/2.5/co/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Effect of ammoniacal thiosulfate solution composition on the gold dissolution rate: An electrochemical studyArtículo de investigaciónhttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARThttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAmoníacoAmmoniaAnálisis electroquímicoElectrochemical analysisLixiviaciónLeachingIngeniería químicaChemical engineeringProcesos químicosChemical processesReacciones químicasChemical reactionsElectrolitosElectrolytesElectrodisolución de oroReducción de oxígenoElectrochim. 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