Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form
In this study, gold and silver were recovered through a bioleaching process conducted at room temperature over 11 days. Native bacteria and varying ratios of mineral pulp to culture medium (20/80, 37.5/62.5, and 50/50 %) from a mining operation in Zacatecas, Mexico, were evaluated. The mineral was c...
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Elsevier
2025-01-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844025002580 |
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| author | Cuauhtémoc Contreras Mora Juan Antonio Rojas Contreras Mayra Cristina Rosales Villarreal José Luis Urban Martínez Efren Delgado Hiram Medrano Roldan Felipe Samuel Hernández Rodarte Damián Reyes Jáquez |
| author_facet | Cuauhtémoc Contreras Mora Juan Antonio Rojas Contreras Mayra Cristina Rosales Villarreal José Luis Urban Martínez Efren Delgado Hiram Medrano Roldan Felipe Samuel Hernández Rodarte Damián Reyes Jáquez |
| author_sort | Cuauhtémoc Contreras Mora |
| collection | DOAJ |
| description | In this study, gold and silver were recovered through a bioleaching process conducted at room temperature over 11 days. Native bacteria and varying ratios of mineral pulp to culture medium (20/80, 37.5/62.5, and 50/50 %) from a mining operation in Zacatecas, Mexico, were evaluated. The mineral was crushed to a particle size of 0.125 inches or smaller, containing gold and silver concentrations of 0.609 g/ton and 138.89 g/ton, respectively. Four native microorganisms were identified using molecular biology techniques and a 16S rRNA gene fragment: Acidovorax citrulli, Brevundimonas albigilva, Sphingomonas korenensis, and Methylobacterium organophilum. The bioleaching system achieved metal extractions of 84.12 % and 63.93 % for gold and silver, respectively. Different microorganisms were identified at various processing times: Sphingomonas korenensis (days 1, 2, 5, 8, and 11), Methylobacterium organophilum (days 1 and 2), Paenibacillus dongdonensis (days 1 and 2), Brevundimonas albigilva (day 5), Ureibacillus manganicus (day 5), Peribacillus simplex (day 8), Niallia circulans (day 8), Massilia atriviolacea (day 11), and Bacillus licheniformis (day 11). The dominant bacterium throughout the process was Sphingomonas korenensis, which appeared at all stages of the experiment. |
| format | Article |
| id | doaj-art-506d2e956a9f4148ad2970267e9989cd |
| institution | Kabale University |
| issn | 2405-8440 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj-art-506d2e956a9f4148ad2970267e9989cd2025-02-02T05:28:27ZengElsevierHeliyon2405-84402025-01-01112e41878Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide formCuauhtémoc Contreras Mora0Juan Antonio Rojas Contreras1Mayra Cristina Rosales Villarreal2José Luis Urban Martínez3Efren Delgado4Hiram Medrano Roldan5Felipe Samuel Hernández Rodarte6Damián Reyes Jáquez7Department of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoDepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoDepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoDepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoFood Science and Technology, Department of Family and Consumer Sciences, New Mexico State University, P.O. Box 30001, Las Cruces, NM, 88003-8001, USADepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoDepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, MexicoDepartment of Chemical and Biochemical Engineering, National Technological Institute of Mexico (TecNM), Durango Institute of Technology (ITD), Felipe Pescador 1830 Ote. Col, Nueva Vizcaya, Durango, Dgo, 34080, Mexico; Corresponding author.In this study, gold and silver were recovered through a bioleaching process conducted at room temperature over 11 days. Native bacteria and varying ratios of mineral pulp to culture medium (20/80, 37.5/62.5, and 50/50 %) from a mining operation in Zacatecas, Mexico, were evaluated. The mineral was crushed to a particle size of 0.125 inches or smaller, containing gold and silver concentrations of 0.609 g/ton and 138.89 g/ton, respectively. Four native microorganisms were identified using molecular biology techniques and a 16S rRNA gene fragment: Acidovorax citrulli, Brevundimonas albigilva, Sphingomonas korenensis, and Methylobacterium organophilum. The bioleaching system achieved metal extractions of 84.12 % and 63.93 % for gold and silver, respectively. Different microorganisms were identified at various processing times: Sphingomonas korenensis (days 1, 2, 5, 8, and 11), Methylobacterium organophilum (days 1 and 2), Paenibacillus dongdonensis (days 1 and 2), Brevundimonas albigilva (day 5), Ureibacillus manganicus (day 5), Peribacillus simplex (day 8), Niallia circulans (day 8), Massilia atriviolacea (day 11), and Bacillus licheniformis (day 11). The dominant bacterium throughout the process was Sphingomonas korenensis, which appeared at all stages of the experiment.http://www.sciencedirect.com/science/article/pii/S2405844025002580BioleachingGoldSilverSphingomonas korenensis |
| spellingShingle | Cuauhtémoc Contreras Mora Juan Antonio Rojas Contreras Mayra Cristina Rosales Villarreal José Luis Urban Martínez Efren Delgado Hiram Medrano Roldan Felipe Samuel Hernández Rodarte Damián Reyes Jáquez Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form Heliyon Bioleaching Gold Silver Sphingomonas korenensis |
| title | Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| title_full | Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| title_fullStr | Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| title_full_unstemmed | Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| title_short | Identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| title_sort | identification of microorganisms at different times in a bioleaching process for the recovery of gold and silver from minerals in oxide form |
| topic | Bioleaching Gold Silver Sphingomonas korenensis |
| url | http://www.sciencedirect.com/science/article/pii/S2405844025002580 |
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