Mora Cuauhtémoc Contreras, Rojas Contreras Juan Antonio, Rosales Villarreal Mayra Cristina, Urban Martínez José Luis, Delgado Efren, Medrano Roldan Hiram, Hernández Rodarte Felipe Samuel, Reyes Jáquez Damián
Department 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.
Food Science and Technology, Department of Family and Consumer Sciences, New Mexico State University, P.O. Box 30001, Las Cruces, NM, 88003-8001, USA.
Heliyon. 2025 Jan 10;11(2):e41878. doi: 10.1016/j.heliyon.2025.e41878. eCollection 2025 Jan 30.
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: , , , and . 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: (days 1, 2, 5, 8, and 11), (days 1 and 2), (days 1 and 2), (day 5), (day 5), (day 8), (day 8), (day 11), and (day 11). The dominant bacterium throughout the process was , which appeared at all stages of the experiment.
在本研究中，通过在室温下进行11天的生物浸出过程回收金和银。对来自墨西哥萨卡特卡斯一个采矿作业的天然细菌以及不同比例的矿浆与培养基（20/80、37.5/62.5和50/50%）进行了评估。将矿石粉碎至粒径为0.125英寸或更小，其金和银的浓度分别为0.609克/吨和138.89克/吨。使用分子生物学技术和16S rRNA基因片段鉴定出四种天然微生物： 、 、 和 。生物浸出系统实现了金和银的金属提取率分别为84.12%和63.93%。在不同处理时间鉴定出不同的微生物： （第1、2、5、8和11天）、 （第1和2天）、 （第1和2天）、 （第5天）、 （第5天）、 （第8天）、 （第8天）、 （第11天）和 （第11天）。整个过程中的优势细菌是 ，它出现在实验的所有阶段。
