dc.creator | Lorenzo Tallafigo, Juan | es |
dc.creator | Iglesias González, María Nieves | es |
dc.creator | Mazuelos Rojas, Alfonso | es |
dc.creator | Romero Aleta, Rafael | es |
dc.creator | Carranza Mora, Francisco | es |
dc.date.accessioned | 2023-12-26T11:37:10Z | |
dc.date.available | 2023-12-26T11:37:10Z | |
dc.date.issued | 2019-01 | |
dc.identifier.citation | Lorenzo Tallafigo, J., Iglesias González, M.N., Mazuelos Rojas, A., Romero Aleta, R. y Carranza Mora, F. (2019). An alternative approach to recover lead, silver and gold from black gossan (polymetallic ore). Study of biological oxidation and lead recovery stages. Journal of Cleaner Production, 207 (10), 510-521. https://doi.org/10.1016/j.jclepro.2018.10.041. | |
dc.identifier.issn | 0959-6526 | es |
dc.identifier.issn | 1879-1786 | es |
dc.identifier.uri | https://hdl.handle.net/11441/152799 | |
dc.description.abstract | A novel procedure to recover lead, silver and gold from polymetallic sulphide ores, cleaner than the
traditional hydrometallurgical route (hot brine leaching), is proposed. This process consists of a biooxidation stage, where sulphides are oxidised by the action of extremophiles, followed by an acid
washing and a citrate leaching in which lead is recovered. The final solid obtained, mainly composed of
quartz, is rich in silver and gold. This paper is focused on the biooxidation and the lead recovery of the
black gossan, a polymetallic sulphide ore with valuable amounts of lead, silver and gold. Biooxidation
performed with a mixed mesophilic culture (mainly Acidithiobacillus ferrooxidans) at 20% pulp density is
able to dissolve the sulphide matrix, removing the gold refractory behaviour and producing jarosite,
beaverite, gypsum and anglesite. A previous sulphuric acid washing of biooxidation residue greatly
improves the lead recovery in the citrate stage. In the sulphuric acid washing, jarosite and beaverite are
dissolved, being the most important variables the temperature and sulphuric acid concentration. The
jarosite dissolution kinetics shows that the rate controlling step is the chemical reaction, with an activation energy of 86.4 kJ/mol. A linear relationship between the jarosite dissolved and lead recovered is
found, reinforcing the necessity of a previous H2SO4 washing. The optimal pH range for lead recovery in
the citrate solution is 5e9. Pulp densities higher than 5% produces an unstable solution, precipitating a
part of the lead. A negative effect of gypsum has been confirmed through several citrate leaching tests
performed with pure anglesite. The solid obtained after the studied stages is suitable to recover gold and
silver that contains. | es |
dc.format | application/pdf | es |
dc.format.extent | 12 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Journal of Cleaner Production, 207 (10), 510-521. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Biomining | es |
dc.subject | Jarosite dissolution | es |
dc.subject | Citrate leaching | es |
dc.subject | Polymetallic ore | es |
dc.subject | Lead recovery | es |
dc.title | An alternative approach to recover lead, silver and gold from black gossan (polymetallic ore). Study of biological oxidation and lead recovery stages | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Química | es |
dc.relation.publisherversion | https://doi.org/10.1016/j.jclepro.2018.10.041 | es |
dc.identifier.doi | 10.1016/j.jclepro.2018.10.041 | es |
dc.journaltitle | Journal of Cleaner Production | es |
dc.publication.volumen | 207 | es |
dc.publication.issue | 10 | es |
dc.publication.initialPage | 510 | es |
dc.publication.endPage | 521 | es |