Effect of carbonaceous matter on bioleaching of Cu from chalcopyrite ore

Konadu, Kojo T.; Sakai, Ryotaro; Mendoza, Diego M.; Chuaicham, Chitiphon; Miki, Hajime; Sasaki, Keiko

doi:10.1016/j.hydromet.2020.105363

Cited by 5 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior has not been described before in chalcopyrite bioleaching studies found in the literature. Many bioleaching studies in batch conditions have been performed during less than 60 days 40‐45 and, to the best of our knowledge, studies that experimented beyond this time span are scarce in the literature. Long‐term chalcopyrite bioleaching studies 16,18,46‐48 have not described a reduction in copper concentration.…”

Section: Resultsmentioning

confidence: 99%

Influence of ore grade and mineral medium on chalcopyrite bioleaching with mixed microbial consortia

Benzal

Solé

Lao

et al. 2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In the present work, key parameters in copper bioleaching from chalcopyrite have been investigated at long‐term operation. In detail, the type of mixed microbial consortium (origin and adaptation); the composition of two mineral media (the growth medium and the modified 9K medium); its buffer capacity by the buffers HCl/KCl and Na2HPO4/KH2PO4; and the influence of different ore grades in relation with the potential alkalinity associated have been investigated. For the first time, a mixed microbial consortium, obtained from a gas‐phase biotrickling filter treating high loads of H2S, was employed revealing significant copper extraction by biological leaching. Results reveal that a single adaptation step of this biomass improved both kinetics and process efficiency, nearly doubling the amount of copper obtained compared with the non‐adapted consortium. Nevertheless, the growth medium also influences the efficiency of the bioleaching process, enhancing copper extraction at higher sulfate concentration. The ore containing the metal is also a determining factor, obtaining same copper extraction for biotic and abiotic in one case, and enhancing up to 50 times from the abiotic in the other. Thus, this becomes a relevant limitation for the applicability of bioleaching for some ores, mainly due to the composition of the matrix.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of ore grade and mineral medium on chalcopyrite bioleaching with mixed microbial consortia

Benzal

Solé

Lao

et al. 2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

Enhanced effect of biochar on leaching vanadium and copper from stone coal tailings by Thiobacillus ferrooxidans

Dong

Chong

Lin

2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

Among the many extraction technologies for recovering metal resources from tailings, bioleaching technology is gradually showing its momentum. In our research, the enhanced effect of biochar on the bioleaching of stone coal tailings by Thiobacillus ferrooxidans (T. ferrooxidans) has been explored. In the static bioleaching experiment for 10 days, the leaching rate of vanadium (V) and copper (Cu) increased by 26.8% and 21.0% respectively after adding 5 g/L biochar. The dynamic bioleaching experiment further verified that under the promotion of biochar, the 44 day cumulative leaching rate of V and Cu increased by 15.3% and 14.5%, respectively. The promoting effect of biochar on T. ferrooxidans was mainly reflected in two aspects. The unique porous structure of biochar created a microenvironment for free microorganisms for inhabitation, while storing abundant nutrients. Biochar can also act as an excellent electronic medium to promote electron transfer, improving the oxidation ability of T. ferrooxidans on Fe 2+ . Furthermore, the presence of biochar may effectively inhibit the formation of jarosite precipitation on tailings in bioleaching, thereby improving the dissolution of tailings and the release of metal elements. This study demonstrates that biochar-enhanced bioleaching may be an efficient and environmentally friendly method for recovering metal resources from tailings.

show abstract

Removal of antimonite and antimonate in aqueous solution by mugwort biochar modified by Acidithiobacillus ferrooxidans after pyrolysis

Liu

Xin

Wang

et al. 2023

Bioresource Technology

View full text Add to dashboard Cite

Effect of carbonaceous matter on bioleaching of Cu from chalcopyrite ore

Cited by 5 publications

References 32 publications

Influence of ore grade and mineral medium on chalcopyrite bioleaching with mixed microbial consortia

Influence of ore grade and mineral medium on chalcopyrite bioleaching with mixed microbial consortia

Enhanced effect of biochar on leaching vanadium and copper from stone coal tailings by Thiobacillus ferrooxidans

Removal of antimonite and antimonate in aqueous solution by mugwort biochar modified by Acidithiobacillus ferrooxidans after pyrolysis

Contact Info

Product

Resources

About