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Wyszukujesz frazę "Acidithiobacillus ferrooxidans" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Application of Acidithiobacillus ferrooxidans for recovering metals from electronic waste dust
Autorzy:
Blazek, V.
Zavada, J.
Kucerova, R.
Nadkanska, H.
Powiązania:
https://bibliotekanauki.pl/articles/110012.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bacterial leaching
Acidithiobacillus ferrooxidans
electronic waste
Opis:
The paper discusses metal recovery from metallic wastes by means of pure chemical and biological leaching in an acidic medium. The research tested whether it is possible to remove Cu, Al, Sn and Ag from the dust formed during processing of electronic waste by means of Acidithiobacillus ferrooxidans. A laboratory flow bioreactor was designed and assembled for the purpose of the experiments. The experiments confirmed the effect of the bacteria on the dissolution of Cu, Al, and Sn, as well as different efficiency levels depending on the type of the leached material. The experimental results confirmed the positive effect of the presence of Acidithiobacillus ferrooxidans bacteria on the recovery of Cu, Al and mainly Sn into the leaching solutions from the leached dust.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 249-257
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stirred-tank leaching of coarse-grained waste, printed circuit boards with Acidithiobacillus ferrooxidans
Autorzy:
Fu, Kaibin
Tian, Li
Hou, Puyao
Long, Meiqiao
Chen, Shu
Lin, Hai
Powiązania:
https://bibliotekanauki.pl/articles/2146844.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
stirred tank leaching
coarse-grained WPCBs
A ferrooxidans
H+ consumption
Avrami equation
Opis:
Stirred tank leaching of metals from coarse-grained waste, printed circuit boards (WPCB) used Acidithiobacillus ferrooxidans (A. ferrooxidans) at ambient temperature (20-35°C). The effect of the baffle size, WPCB concentration, and inoculation volume was tested. 95.92% of Cu, 93.53% of Al, 92.58% of Zn, 65.27% of Ni, and 95.33% of Sn in WPCBs were leached under the optimal conditions: no baffle, WPCB concentration of 5.0% (w/w), and inoculation volume of 5% (v/v). The alkaline substance and reactivity metal of WPCBs, and the oxidation of Fe2+, consume H+. Adding acid can maintain the pH value of the leaching solution, which is conducive to the growth and reproduction of the bacteria and improves the leaching efficiency of WPCBs. The second-order dynamics model can describe the acid consumption in the bioleaching process of coarse-grained WPCBs. Moreover, the Avrami equation can successfully explain the bioleaching kinetics of Cu, Al, Zn, Ni, and Sn from the coarse-grained WPCBs. The key factors controlling the bioleaching of coarse-grained WPCBs are metal reactivity and specific surface area. These results revealed that bioleaching metals from coarse-grained WPCBs using A.ferrooxidans is feasible, and has important significance to guiding its industrialization.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 5; 153--163
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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