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首页> 外文期刊>Journal of Environmental Science and Health >Uranium and other heavy metal resistance and accumulation in bacteria isolated from uranium mine wastes
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Uranium and other heavy metal resistance and accumulation in bacteria isolated from uranium mine wastes

机译：从铀矿废料中分离出来的细菌对铀和其他重金属的抵抗力和积累

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摘要

Ten bacterial strains isolated from uranium mine wastes were characterized in terms of their uranium and other metal resistance and accumulation. 16S rRNA gene sequence analysis identified the strains as members of genera Bacillus, Serratia, and Arthrobacter. Strains were able to utilize various carbon sources, particularly aromatic hydrocarbons, grow at broad pH and temperature ranges and produce non specific acid phosphatase relevant for metal phosphate precipitation in contaminated environment. The isolates exhibited high uranium and other heavy metals (Ni, Co, Cu and Cd) resistance and accumulation capacities. Particularly, Arthrobacter sp. J001 and Bacillus sp. J003 were superior in terms of U resistance at low pH (pH 4.0) along with metals and actinides (U and Th) removal with maximum cell loading of 1088 /μmol U, 1293 /μmol Th, 425 μmol Cu, 305 μmol Cd, 377 μmol Zn, 250 μmol Ni g~(-1) cell dry wt. Genes encoding P_(1B)-type ATPases (Cu-CPx and Zn-CPx) and ABC transporters (nik) as catalytic tools for maintaining cellular metal homeostasis were detected within several Bacillus spp., with possible incidence of horizontal gene transfer for the later gene showing phylogenetic lineage to α Proteobacteria members. The study provides evidence on intrinsic abilities of indigenous bacteria from U-mine suitable for survival and cleaning up of contaminated mine sites.
机译：从铀矿山废物中分离出的十种细菌菌株根据其铀和其他金属的抗性和积累进行了表征。 16S rRNA基因序列分析确定了该菌株为芽孢杆菌属，沙雷氏菌属和节杆菌属的成员。菌株能够利用各种碳源，特别是芳香烃，在宽的pH和温度范围内生长，并产生与污染环境中金属磷酸盐沉淀有关的非特异性酸性磷酸酶。分离物表现出高的铀和其他重金属（Ni，Co，Cu和Cd）抗性和积累能力。特别是节杆菌属。 J001和芽孢杆菌J003在低pH（pH 4.0）下的抗U性以及去除金属和act系元素（U和Th）方面表现优异，最大细胞负载为1088 /μmolU，1293 /μmolTh，425μmolCu，305μmolCd，377 μmolZn，250μmolNi g〜（-1）电池干重在几个芽孢杆菌中检测到编码P_（1B）型ATPases（Cu-CPx和Zn-CPx）和ABC转运蛋白（nik）作为维持细胞金属稳态的催化工具的基因，以后可能发生水平基因转移该基因对α变形杆菌成员显示系统进化谱系。这项研究提供了有关铀矿中本地细菌固有能力的证据，这些能力适用于生存和清理受污染的雷场。

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