RT Journal Article
T1 Bioleaching of Sulfide Minerals by Leptospirillum ferriphilum CC from Polymetallic Mine (Armenia)
A1 Vardanyan, Arevik
A1 Khachatryan, Anna
A1 Castro Ruiz, Laura
A1 Willscher, Sabine
A1 Gaydardzhiev, Stoyan
A1 Zhang, Ruiyong
A1 Vardanyan, Narine
AB A strain of Leptospirillum sp. CC previously isolated from Akhtala polymetallic ore (Armenia) was studied. The main morphological and physiological characteristics of CC were revealed. The optimal growth temperature was 40 ◦C and optimal pH 1.5. A phylogenetic analysis based on 16S rRNA gene sequences (GenBank ID OM272948) showed that isolate CC was clustered with L. ferriphilum and possessed 99.8% sequence similarity with the strain L. ferriphilum OL12-2 (KF356024). The molar fraction of DNA (G + C) of the isolate was 58.5%. Bioleaching experiment indicates that L. ferriphilum CC can oxidize Fe(II) efficiently, and after 17 days, 44.1% of copper and 91.4% of iron are extracted from chalcopyrite and pyrite, respectively. The efficiency of L. ferriphilum CC in pyrite oxidation increases 1.7 times when co-cultivated with At. ferrooxidans ZnC. However, the highest activity in pyrite oxidation shows the association of L.ferriphilum CC with heterotrophic Acidocella sp. RBA bacteria. It was shown that bioleaching of copper and iron from chalcopyrite by association of L. ferriphilum CC, At. ferrooxidans ZnC, and At. albertensis SO-2 in comparison with pure culture L. ferriphilum CC for 21 days increased about 1.2 and 1.4–1.6 times, respectively.
PB MDPI
SN 2075-163X
SN 2075-163X
YR 2023
FD 2023
LK https://hdl.handle.net/20.500.14352/73395
UL https://hdl.handle.net/20.500.14352/73395
LA eng
NO Vardanyan, A.; Khachatryan, A.; Castro, L.; Willscher, S.; Gaydardzhiev, S.; Zhang, R.; Vardanyan, N. Bioleaching of Sulfide Minerals by Leptospirillum ferriphilum CC from Polymetallic Mine (Armenia). Minerals 2023, 13, 243
NO Science Committee of Republic of Armenia
DS Docta Complutense
RD 7 oct 2024