Bioleaching of gold

Marcel Dekker Inc; New York: Extraction of aluminum from fly-ash by commercial and microbiologically produced citric acid. Fungal dry biomass and changes in culture medium pH The amount of dry fungal biomass decreased significantly in the presence of either GFICMs or PCBs; however, this reduction was dependent on the treatment Figure 4. In addition, the residues were subjected to preg-rob analysis to determine the activity of the treated materials.

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Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

Fungal dry biomass and changes in culture medium pH The amount of dry fungal biomass decreased significantly in the presence of either GFICMs or PCBs; however, this reduction was dependent on the treatment Figure 4. From materials science to chemical science.

Cui J, Zhang L. For instance, bacteria such as Thiobacillus ferrooxidans and T. Bioleached residues and acidified residues were evaluated for iron extraction and for gold recovery by cyanidation. Get rights and content.

Bioleaching Carbonaceous Gold Ores

In contrast, there was only a slight decrease in preg-robbing potential for most of the ores Table 4. As seen in the previous example, the carbonaceous gold ore was still active with respect to bioleaaching even after bioleaching. Thus, this fungal strain was only assessed in combination with A.

Improvement of the metal recovery efficiency by means of fungal metabolism is also discussed. After the acidified ore was bioleached with S16I, iron extraction had increased substantially. Brandl H, Bioleachig MA. National Center for Biotechnology InformationU. Golr of gold by cell Candida utilis. Handbook of Copper Compounds and Applications. In contrast, knowledge of metal bioleaching from WEEE by filamentous fungi is still scarce.

For instance, PCBs resulted in stronger growth inhibition for the combination of A.

Bioleaching Carbonaceous Gold Ores The previous tests demonstrated the use of facultative and extreme thermophiles for refractory sulfide gold ores and flotation concentrates. The Au-bioleaching from PCBs materials with the consortium of both Aspergillus strains doubled the amount of Au in the culture medium when compared to the single inoculation of Bioleachiing.

Effect of Time in Reheating Quenched Steel. Author links open overlay panel Gregory J. Extraction of aluminum from fly-ash by commercial and microbiologically produced citric acid. The following tests were conducted on carbonaceous gold ores to evaluate response to bioleaching.

However, comparisons of our results were not possible because scientific information about Au-bioleaching from PCBs and GFICMs materials using filamentous fungi is still lacking.

Aspergillus niger MX7 and Aspergillus sp. Four other carbonaceous gold ores were tested to determine how bioleaching affected the preg-robbing potential.

In conclusion, Au tolerance of Aspergillus species could be a good indicator for bioleacching filamentous fungi able to cause bioleaching of gold from WEEE. Find articles by Rosalba Argumedo-Delira. This generally led to increased gold recovery relative to the native ore, although the increase was not significant in the case of the C7 ore.

Microbial oxidation of gold ores and gold bioleaching - ScienceDirect

Their recovery is typically achieved by pyrometallurgical and hydrometallurgical processes, which have certain energy and environmental disadvantages Cui and Zhang, ; Weidenhamer and Clement, Research on this subject may result in fundamental information for generating low-cost and environmentally sound microbial biotechnologies for the recovery glod precious metals from WEEE.

Sodhi Golx, Reimer B. Elsevier About ScienceDirect Remote access Shopping cart Contact and support Terms and conditions Privacy policy We use cookies to help provide and enhance our service and tailor content and ads. In addition, the residues were subjected to preg-rob analysis to determine the activity of the treated materials.

Aqueous metal recovery techniques from e-scrap: Treatment of the native ore by CIL increased. I Need Consulting Engineering Help.

3 thoughts on “Bioleaching of gold”

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