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Characterization of Urease-Producing Bacteria Isolated from Heavy Metal Contaminated Mine Soil
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 Title & Authors
Characterization of Urease-Producing Bacteria Isolated from Heavy Metal Contaminated Mine Soil
Park, Min-Jeong; Yoon, Min-Ho; Nam, In-Hyun;
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Acid mine drainage occurrence is a serious environmental problem by mining industry; it usually contain high levels of metal ions, such as iron, copper, zinc, aluminum, and manganese, as well as metalloids of which arsenic is generally of greatest concern. It causes mine impacted soil pollution with mining and smelting activities, fossil fuel combustion, and waste disposal. In the present study, three bacterial strains capable of producing urease were isolated by selective enrichment of heavy metal contaminated soils from a minei-mpacted area. All isolated bacterial strains were identified Sporosarcina pasteurii with more than 98% of similarity, therefore they were named Sporosarcina sp. KM-01, KM-07, and KM-12. The heavy metals detected from the collected mine soils containing bacterial isolates as Mn (), As (), Zn (), Cu (), and Pb (). The KM-01, KM-07, and KM-12 strains were shown to be able to precipitate calcium carbonate using urea as a energy source that was amended with calcium chloride. SEM-EDS analyses showed that calcium carbonate was successfully produced and increased with time. To confirm the calcium carbonate precipitation ability, urease activity and precipitate weight were also measured and compared. These results demonstrate that all isolated bacterial strains could potentially be used in the bioremediation of acidic soil contaminated by heavy metals by mining activity.
Heavy metal contamination;Urease;Calcium carbonate precipitation;Bioremediation;
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미생물과 식물에 의해 생성된 탄산칼슘의 광물학적 특성 관찰,남인현;전철민;김재곤;

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