Menu
A method of integrated chemical and bacterial leaching of a base metal from a mineral is disclosed. The method includes leaching a base metal from a mineral with an ammoniacal thiosulfate chemical leaching solution having a pH from about 8.5 to about 10.5 to obtain a first leachate, subsequently adjusting the first leachate to a neutral pH in a range from …
This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria followed by chemical leaching of the bioleaching residue were …
In the bioleaching of bornite, ferric iron is an effective leaching agent for the chemical dissolution of bornite, and the reaction was shown as Re. . Though ferrous iron can be further oxidized to ferric iron by dissolved oxygen to keep the continued dissolution of bornite, the regeneration of ferric iron by this process is very limited (Re ...
Nov 08, 2016· PDF | Comparative chemical oxidation of pyrite and chalcopyrite by both ferric iron (Fe 2 (SO 4) 3) solution and biogenic ferric iron was studied.... | Find, read and cite all the research you ...
The low bioleaching yield in the decoked spent catalyst was attributed to metals' presence in stable fractions (residual + oxidizable). After first stage bioleaching, the integration of a second stage chemical oxidation process (1 M H2O2) drastically improved the leaching of Ni, Mo, and V (94.2-) from the coked spent catalyst.
Nov 01, 2022· Leaching results showed that the copper ion extraction increased during chemical leaching but decreased during bioleaching when pH value decreased from 2.50 to 1.25.
This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria followed by chemical leaching of the bioleaching residue were …
1 · A series of leaching experiments was conducted with the milled PCBs using the lixiviant produced in the sulfur and iron oxidising reactors ().The three size fractions of the PCB samples were mixed in their relative proportions as recovered from the ring mill (0.675 g of <365 μm, 0.172 g of 365–500 μm and 0.152 g of 500–750 μm per gram of PCBs) …
Chemical leaching with H2SO4 and bioleaching with elemental sulfur and ferrous iron are applied. The results are compared with those found in the literature and in previous leaching experiments with MCI. Bioleaching can be a feasible alternative to promote Zn and Cu solubilizations, especially when ferrous iron is added as substrate.
May 01, 2007· Bioleaching and chemical leaching as an integrated process in the zinc industry @article{Souza2007BioleachingAC, title={Bioleaching and chemical …
May 01, 2007· Considering bioleaching and chemical leaching as integrated processes, the overall leaching time is reduced as compared to that observed by Pani et al. (2003) for the complete bioleaching of ZnS; nevertheless the residence time is still relatively large. As a …
Bioleaching is considered an eco-friendly technique for leaching metals from spent hydroprocessing catalysts; however, the low bioleaching yield of some valuable metals (Mo and V) is a severe bottleneck to its successful implementation. The present study reported the potential of an integrated bioleaching-chemical oxidation process in improved …
This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, …
Nov 15, 2022· Spence is operated exclusively by BHP, and has produced copper cathodes by microbial leaching. The deposit contains reserves of copper oxides (1.14% Cu, mainly as atacamite; Cu 2 Cl(OH) 3) and copper sulfide ores (1.12% Cu, primarily supergene chalcocite and some minor amounts of covellite; CuS).These are mined and processed …
May 01, 2007· The results of column and heap bioleaching showed that 89.25% and 90.40% of uranium were recovered with the consortium and pyrite addition, which …
Chemical leaching is rapid and efficient but causes secondary pollution. Bioleaching is a promising approach, eco-friendly and economically feasible, but it is slower process. This review considers the recycling potential of microbes and suggests an integrated bioleaching approach for Cu extraction and recovery from WPCBs.
： This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria followed by chemical leaching of the bioleaching residue …
Jan 10, 2015· The effectiveness of a two-stage integrated bioleaching process for enhanced recovery of metals from decoked spent petroleum refinery catalyst has been reported. Decoking caused the removal of entrained hydrocarbons and carbonaceous deposits from coked spent catalyst. ... A novel sequential process of bioleaching and …
Jan 21, 2022· The other metallurgical processes like pressure leaching or integrated sulfide-silicate process followed by solvent extraction process are few other processes ... Souza AD, Pina PS, Leão VA (2007) Bioleaching and chemical leaching as an integrated process in the zinc industry. Miner Eng 20:591–599. Google Scholar Souza …
Aug 09, 2020· De Souza AD, Pina PS, Leão VA (2007) Bioleaching and chemical leaching as an integrated process in the zinc industry. Miner Eng 20:591–599. Google Scholar Jian-she L, Xue-hui X, Sheng-mu X, Xiu-mei W, Wen-jie Z, Zhuo-li T (2007) Isolation of Leptospirillum ferriphilum by single-layered solid medium. J Cent South Univ Technol …
Jul 01, 2018· PDF | On Jul 1, 2018, Arevik Vardanyan published Chemical oxidation integrated into bioleaching of pyrite and chalcopyrite using immobilized biomass | Find, read and cite all the research you need ...
Nov 15, 2022· The Chilean mining industry, after consolidating copper production through bioleaching in copper ore heaps, is now facing major challenges and changes in the exploitation of its copper reserves. The depletion of copper oxide ores, as well as a decrease in copper grade, have generated a significant amount of idle capacity in solvent extraction ...
This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, …
Jan 17, 2022· The results suggested that the integrated bioleaching-chemical oxidation process is an effective method for the complete leaching of valuable metals from the …
Bioleaching and chemical leaching as an integrated process This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria …
Jan 17, 2022· Bioleaching is considered an eco-friendly technique for leaching metals from spent hydroprocessing catalysts; however, the low bioleaching yield of some valuable metals (Mo and V) is a severe bottleneck to its successful implementation. The present study reported the potential of an integrated bioleaching-chemical oxidation process in …
Bioleaching is considered an eco-friendly technique for leaching metals from spent hydroprocessing catalysts; however, the low bioleaching yield of some valuable metals (Mo and V) is a severe bottleneck to its successful implementation. The present study reported the potential of an integrated biole …
May 01, 2007· The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria …
Bioleaching and chemical leaching as an integrated process This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc …
The use of bioleaching for the recovery of valuable metals from e-waste is currently one of the rapidly developing areas . However, hydrometallurgy is mainly associated with research, development, and application potential. ... shows that the chemical leaching of the raw material has practically no effect on the identified phase composition ...
Bioleaching is considered an eco-friendly technique for leaching metals from spent hydroprocessing catalysts; however, the low bioleaching yield of some valuable metals …
This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria followed by chemical leaching of the bioleaching residue were …
PDF | This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, …
