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Feasibility Study of Metal Bioleaching in a Gold-Rich Ore Sample by Acidithiobacillus thiooxidans DSM 26636
Transactions of the Indian Institute of Metals ( IF 1.5 ) Pub Date : 2021-05-24 , DOI: 10.1007/s12666-021-02291-w
José Daniel Aguilar Loa , Andrea Margarita Rivas-Castillo , Luis Angel García-Tejeda , Marlenne Gómez-Ramírez , Luz Irene Rojas-Avelizapa , Norma Gabriela Rojas-Avelizapa

Acidithiobacillus thiooxidans has been used in bioleaching processes, being recognized for its high metal leaching ability from industrial wastes. In the present work, the sulfur-oxidizing activity of A. thiooxidans DSM 26636, adapted to increasing concentrations of ore was assessed, finding that at 28 days with 3% (w/v) of ore sample, the culture produces high amounts of the sulfate ion (SO4−2) and sulfuric acid (H2SO4) and causes a decrease in the pH value, compared to the negative control. Also, there was observed a net removal of As, Zn, Fe, Al, Cu, and Au in concentrations of 48.23 ± 3.11, 264.02 ± 26.27, 9055.81 ± 210.39, 605.29 ± 30.26, 2158 ± 359.04, and 0.99 ± 0.37 mg/kg, respectively. Thus, the present work shows the potential of A. thiooxidans DSM 26636 to be used for the extraction of metals contained in ores, especially for those containing Cu, Zn, As, Fe, and Al.



中文翻译:

硫代酸性氧化硫杆菌DSM 26636在富金矿石样品中进行金属生物浸出的可行性研究

酸性硫代氧化硫硫杆菌已用于生物浸出过程,因其从工业废物中的高金属浸出能力而得到公认。在目前的工作中,硫氧化活性A.杆菌DSM 26636,适于提高矿石的浓度进行评价,发现在28天时,用3%(W / V)矿石样品的,所述培养产生高量的硫酸根离子(SO 4 -2)和硫酸(H 2 SO 4),与阴性对照相比会导致pH值降低。此外,还观察到以48.23±3.11、264.02±26.27、9055.81±210.39、605.29±30.26、2158±359.04和0.99±0.37 mg / mg的浓度净去除As,Zn,Fe,Al,Cu和Au公斤。因此,目前的工作示出的电位A.杆菌DSM 26636用于包含在矿石的金属的提取,特别是对含有铜,锌,砷,铁,和Al的那些。

更新日期:2021-05-25
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