Procedure for lepidolite concentrate processing

Onalbaeva, Zh. S.; Samoǐlov, V. I.; Куленова, Н. А.; Zhakupova, G. B.; Adilkanova, Meruyert; Kokaeva, G. A.; Abdulina, S.A.

doi:10.1134/s1070427216100232

Cited by 5 publications

(3 citation statements)

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Section: Resultsmentioning

confidence: 99%

“…Metallic elements from lepidolite are dissolved to form metal sulphates and mixed alums in the solution resulting just in partial lepidolite dissolution 20 . Overal reaction of lepidolite bioleaching in sulphuric acid produced by bacteria may be adopted from Onalbaeva et al 11 : Also Guo et al 27 observed that increased H + concentration catalysed the process of Li leaching from lepidolite via accelerating the protonation of the crystal lattices.…”

Section: Bioleaching Mechanismsmentioning

confidence: 99%

“…Numerous new procedures (sulfuric acid, lime, sulfate, etc.) were studied to be used for lithium recovery from lepidolite 10,11 . However, the use of lepidolite in hydrometallurgy is restricted by high cost of the hydrometallurgical process for lithium recovery from this mineral as it requires a high concentration of acid and complex purification processes 10 .…”

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confidence: 99%

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Comparison of three different bioleaching systems for Li recovery from lepidolite

Sedláková-Kaduková

Marcinčáková

Luptáková

et al. 2020

Sci Rep

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Three different biological systems, the consortium of autotrophic bacteria Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans, heterotrophic fungus Aspergillus niger and heterotrophic yeast Rhodotorula mucilaginosa, were investigated for lithium extraction from lepidolite. The bacterial consortium was the most effective, 11 mg l −1 of Li was dissolved in the absence of nutrients within 336 days. Fungal and yeast bioleaching was faster (40 days), however, with lower extraction efficiency. Bioaccumulation represented a main process of Li extraction by R. mucilaginosa and A. niger, with 92 and 77% of total extracted Li accumulated in the biomass, respectively. The X-ray diffraction analysis for bioleaching residue indicated changes caused by microorganisms, however, with differences between bacterial leaching and bioleaching by fungi or yeasts. The final bioleaching yields for bacterial consortium, A. niger and R. mucilaginosa were 8.8%, 0.2% and 1.1%, respectively. two-step bioleaching using heterotrophic organisms followed by autotrophic bioleaching could lead to the increase of the process kinetics and efficiency. Bioaccumulation of Li offers strong advantage in Li extraction from solution.

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