Version 1
: Received: 29 October 2023 / Approved: 30 October 2023 / Online: 31 October 2023 (04:29:01 CET)
How to cite:
Huang, M.; Li, Z.; Zhang, M.; Wang, W. Aeration Accelerates the Microbial Leaching of Low-Grade Copper Sulfide Ores. Preprints2023, 2023101958. https://doi.org/10.20944/preprints202310.1958.v1
Huang, M.; Li, Z.; Zhang, M.; Wang, W. Aeration Accelerates the Microbial Leaching of Low-Grade Copper Sulfide Ores. Preprints 2023, 2023101958. https://doi.org/10.20944/preprints202310.1958.v1
Huang, M.; Li, Z.; Zhang, M.; Wang, W. Aeration Accelerates the Microbial Leaching of Low-Grade Copper Sulfide Ores. Preprints2023, 2023101958. https://doi.org/10.20944/preprints202310.1958.v1
APA Style
Huang, M., Li, Z., Zhang, M., & Wang, W. (2023). Aeration Accelerates the Microbial Leaching of Low-Grade Copper Sulfide Ores. Preprints. https://doi.org/10.20944/preprints202310.1958.v1
Chicago/Turabian Style
Huang, M., Ming Zhang and Weicheng Wang. 2023 "Aeration Accelerates the Microbial Leaching of Low-Grade Copper Sulfide Ores" Preprints. https://doi.org/10.20944/preprints202310.1958.v1
Abstract
The airflow carried by artificial aeration provides oxidant O2 for microbial growth and mineral dissolution in heap bioleaching. To investigate the effect of forced aeration rate on bioleaching of low-grade copper sulfide ores, column bioleaching experiments with six columns were conducted in the aeration range of 0~150 L/h at 30~45 ℃. The results showed that when the aeration rate was higher than 95 L/h, the proportions of heap settlement and fine particles mass were much greater than that without aeration. The final total Fe concentration and bacterial cell numbers in pregnant leach solution increased with the increase of aeration rate.The final concentrations of Cu2 + in the mother liquor under aeration conditions of 60-150 L / h were 1.411, 1.432, 1.498, 1.491 and 1.583 g / L, respectively, which were higher than 1.345 g / L under non-aeration conditions. When the aeration rate was 150 L / h, the final Cu leaching rate was 80.1 %, which was 11.4 % higher than that without aeration ( 68.7 % ). Furthermore, in the early stage of leaching, copper leaching rate with 95 L/h aeration rate remained the highest. 结论Artificial aeration accelerates the bioleaching of low-grade copper sulfide ores by improving porosity structure, temperature range of bacterial activity and microbial catalyzed dissolution of targeted minerals.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
