Fig. 7. Effect of Fe(II) concentration on the chemical leaching of partially bioleached ZnS. Experimental conditions: 368 K (95 C), 10% solids, initial acidity 175 g/L. - "Bioleaching and chemical leaching as an integrated process in the zinc industry"
→ WhatsApp: +86 18221755073
Bioleaching has several advantages compared to conventional hydrometallurgy (the leaching of metals with acids or bases) or pyrometallurgy (the leaching of metals using thermal treatment), which have high energy requirements, require a large amount of chemicals, and also produce high levels of environmental pollution (Zeng et al., 2013).
→ WhatsApp: +86 18221755073
Chemical leaching as the most preferred method for metal recovery is fast and efficient yet has its environmental concerns. The environmental issues of the chemical leaching agents lead to the utilization of expensive leaching materials that are not affordable (Pandey and Natarajan, 2015; Pant et al., 2012).
→ WhatsApp: +86 18221755073
The present study reported the potential of an integrated bioleaching-chemical oxidation process in improved leaching of valuable metals (Mo and V) from refinery spent hydroprocessing …
→ WhatsApp: +86 18221755073
The paper unpacks acidophile sulfide bioleaching mechanisms within bioreactors into various sub-processes and analyses them in terms of their rate limitations, such as gas-liquid mass transfer of oxygen and CO 2, diffusion constraints between and within mineral particles, competing side reactions etc.It becomes clear that microbial metabolic reactions are generally …
→ WhatsApp: +86 18221755073
A comparison of the bioleaching and the chemical leaching has given insight into the mechanism of Ni, Cu, Zn and Cr extraction from electroplating sludge. ... Integrated diffusion dialysis precipitation – cementation for selective recovery of leaching chemicals and metal values from electroplating sludge.
→ WhatsApp: +86 18221755073
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. ... (<5%). The results suggested that the integrated bioleaching-chemical oxidation process is an effective ...
→ WhatsApp: +86 18221755073
Physical-chemical leaching is commonly adopted for the recovery of REEs from ores and solid wastes, but concerns over the generation of hazards, operation safety, and environmental pollution have urged the transition to greener and more sustainable leaching methods. Bioleaching is considered an excellent alternative for the recovery of REEs.
→ WhatsApp: +86 18221755073
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 chemical leaching for ...
→ WhatsApp: +86 18221755073
DOI: 10.1016/J.MINENG.2006.12.014 Corpus ID: 55680986; Bioleaching and chemical leaching as an integrated process in the zinc industry @article{Souza2007BioleachingAC, title={Bioleaching and chemical leaching as an integrated process in the zinc industry}, author={Adelson Dias de Souza and Pablo dos Santos Pina and …
→ WhatsApp: +86 18221755073
Methodology: In this study, bioleaching integrated with an electrokinetic ... treatment, and chemical leaching are used in the detoxification or decontamination of incineration fly ash (Abbas et ...
→ WhatsApp: +86 18221755073
The (bio)chemical fundamentals of the leaching reactions have been the subject of intensive research in the last decades. In this context, the sulfur chemistry behind the leaching mechanisms has been widely understood ... Acid bioleaching. Acid leaching is applied in hydrometallurgy by using inorganic acids for the dissolution of ores, e.g ...
→ WhatsApp: +86 18221755073
The objective of the current study is the investigation of the effect of L-cysteine on the bioleaching and chemical leaching of zinc and cadmium from sphalerite concentrate by two kinds of typical mesophilic and moderately thermophilic iron- and sulfur-oxidizing bacteria. ... Bioleaching and chemical leaching as an integrated process in the ...
→ WhatsApp: +86 18221755073
Optimized system was then used for the anaerobic bioleaching and chemical leaching effluents and metal removal efficiencies of 27.1 ± 1.3% and 46.0 ± 4.3% were obtained, respectively. Considering integrated leaching and membrane separation processes, metal removal efficiencies obtained in this study are valuable as it will decrease the metal ...
→ WhatsApp: +86 18221755073
Types of leaching Physical leaching. Physical leaching is a simple procedure for solute dissolution in a solvent. In this method, the solvent is frequently made up of water, alcohol, and other organic solvents. Bioleaching. Microorganisms are used in the bioleaching procedure to dissolve insoluble metal forms.
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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% …
→ WhatsApp: +86 18221755073
For instance, bioleaching has slower reaction rates than chemical leaching, which requires constant monitoring of parameters to ensure efficiency, resulting in increased capital expenses for larger vessels or more vessels and impellers, as well as higher energy demands due to the need for larger equipment and increased gas flow rates.
→ WhatsApp: +86 18221755073
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 assessed.
→ WhatsApp: +86 18221755073
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, …
→ WhatsApp: +86 18221755073
Methodology: In this study, bioleaching integrated with an electrokinetic approach for heavy metal remediation from MSW incineration fly ash using Acidithiobacillus ferrooxidans and ...
→ WhatsApp: +86 18221755073
This study is aimed to review existing processes to produce zinc metal and evaluate parameters of bio and direct leaching of zinc sulfide concentrates. The experiments, …
→ WhatsApp: +86 18221755073
In the present study, a novel sequential bioreduction-bioleaching and bioreduction-chemical leaching route as a hybrid process is compared and discussed for the enhanced recovery of copper from an ...
→ WhatsApp: +86 18221755073
Semantic Scholar extracted view of "Recent trends and challenges in bioleaching technologies" by P. Kumar et al. ... Flotation tailings originating from copper ore processing were evaluated in terms of chemical and mineralogical features, leaching, and resource potential. The results ... Bioleaching and chemical leaching as an integrated ...
→ WhatsApp: +86 18221755073
Fig. 9 shows the results concerning metal recovery by chemical leaching and spent-medium bioleaching of roasted CFA. The outcomes showed that the recovery of Ge, V and Li was 24.4%, 26.1% and 22.4% higher using the spent-medium bioleaching compared to that in chemical leaching at approximately the same concentrations of the three organic acids.
→ WhatsApp: +86 18221755073
The global transition to a circular economy calls for research and development on technologies facilitating sustainable resource recovery from wastes and by-products. Metal-bearing materials, including electronic wastes, tailings, and metallurgical by-products, are increasingly viewed as valuable resources, with some possessing comparable or superior …
→ WhatsApp: +86 18221755073
The study's findings suggested that an integrated bioleaching-chemical oxidation process can be a highly effective method for the improved leaching of valuable metals from the …
→ WhatsApp: +86 18221755073
The bacterial leaching of zinc and iron from solid wastes at the Isdemir iron and steel plant has been investigated using Acidithiobacillus ferrooxidans as the bacterial agent. The effects of a range of operational parameters, including particle size, solids concentration and pH, on the efficiency of the bioleaching process were investigated. In each test, several variables …
→ WhatsApp: +86 18221755073
Using simulated chemical leaching with a mixture of 5237 ppm (w/w) citric acid, 3666 ppm gluconic acid, 1287 ppm oxalic acid and 188 ppm malic acid as comparison, it was …
→ WhatsApp: +86 18221755073
The most widespread method for copper biomining is bioleaching: the extraction of soluble copper from complex solid mixtures (Gumulya et al. 2018). Therefore, it is not surprising that bioleaching has been the focus of recent approaches to copper bioremediation (Fonti, Dell'Anno and Beolchini 2016) and recycling (Drobíková et al. 2015).
→ WhatsApp: +86 18221755073
Stone Crusher-sold by certified Suppliers,such as Jaw / Cone / Impact / Mobile Crusher,etc.
GET QUOTE
