Identification and hexavalent chromium reduction characteristics of Pannonibacter phragmitetus
Identification and hexavalent chromium reduction characteristics of Pannonibacter phragmitetus
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芦苇潘诺杆菌的鉴定及六价铬还原特性
DOI：
10.1007/s00449-011-0668-y
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发表时间：
2012-06
影响因子：
3.8
通讯作者：
Chen, Yuehun
中科院分区：
文献类型：
--
作者：
Shi, Yan;Chai, Liyuan;Yang, Zhihui;Jing, Qingxiu;Chen, Runhua;Chen, Yuehun
从含铬渣中分离到一株六价铬还原菌。根据生理生化特性和16 S rRNA基因序列分析，初步鉴定该菌为芦苇丛枝菌（Pannonibacter phragmitetus）。该菌具有很强的Cr（VI）还原能力。当Cr（VI）初始浓度为1,917 mg L（-1）时，在厌氧条件下24 h即可完全去除，最大去除速率为562.8 mg L（-1）h（-1）。Cr（VI）的还原速率随Cr（VI）浓度的增加而增加。芦苇原杆菌能够利用乳糖、果糖、葡萄糖、丙酮酸、柠檬酸、甲酸、乳酸、NADPH和NADH等多种碳源作为电子供体，其中乳酸对还原过程的促进作用最大。Zn（2+）、Cd（2+）、Ni（2+）抑制还原，Cu（2+）、Pb（2+）、Mn（2+）、Co（2+）促进还原。还原的最适pH和温度分别为9.0和30 °C。结果表明，该菌株在铬污染土壤和水体的生物修复中具有很大的应用潜力。
A hexavalent chromium [Cr(VI)] reducing bacterial strain was isolated from chromium-containing slag. It was identified as Pannonibacter phragmitetus based on physiological, biochemical characteristics and 16S rRNA gene sequence analysis. This bacterium displayed great Cr(VI) reduction capability. The Cr(VI) could be completely removed in 24 h under anaerobic condition when the initial concentration was 1,917 mg L(-1), with the maximum reduction rate of 562.8 mg L(-1) h(-1). The Cr(VI) reduction rate increased with the increase of Cr(VI) concentration. P. phragmitetus was able to use many carbon sources such as lactose, fructose, glucose, pyruvate, citrate, formate, lactate, NADPH and NADH as electron donors, among which the lactate had the greatest power to promote the reduction process. Zn(2+), Cd(2+) and Ni(2+) inhibited, while Cu(2+), Pb(2+), Mn(2+) and Co(2+) stimulated the reduction. The optimum pH and temperature for reduction were 9.0 and 30 °C, respectively. The results indicated that this strain had great potential for application in the bioremediation of chromate-polluted soil and water systems.
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影响因子：
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影响因子：
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影响因子：
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