• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Microbiology >Iron Corrosion Induced by Nonhydrogenotrophic Nitrate-Reducing Prolixibacter sp. Strain MIC1-1
【24h】

Iron Corrosion Induced by Nonhydrogenotrophic Nitrate-Reducing Prolixibacter sp. Strain MIC1-1

机译：还原非氢营养硝酸盐的Prolixibacter sp。引起的铁腐蚀MIC1-1菌株

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Microbiologically influenced corrosion (MIC) of metallic materials imposes a heavy economic burden. The mechanism of MIC of metallic iron (Fe~(0)) under anaerobic conditions is usually explained as the consumption of cathodic hydrogen by hydrogenotrophic microorganisms that accelerates anodic Fe~(0) oxidation. In this study, we describe Fe~(0) corrosion induced by a nonhydrogenotrophic nitrate-reducing bacterium called MIC1-1, which was isolated from a crude-oil sample collected at an oil well in Akita, Japan. This strain requires specific electron donor-acceptor combinations and an organic carbon source to grow. For example, the strain grew anaerobically on nitrate as a sole electron acceptor with pyruvate as a carbon source and Fe~(0) as the sole electron donor. In addition, ferrous ion and l-cysteine served as electron donors, whereas molecular hydrogen did not. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain MIC1-1 was a member of the genus Prolixibacter in the order Bacteroidales . Thus, Prolixibacter sp. strain MIC1-1 is the first Fe~(0)-corroding representative belonging to the phylum Bacteroidetes . Under anaerobic conditions, Prolixibacter sp. MIC1-1 corroded Fe~(0) concomitantly with nitrate reduction, and the amount of iron dissolved by the strain was six times higher than that in an aseptic control. Scanning electron microscopy analyses revealed that microscopic crystals of FePO_(4) developed on the surface of the Fe~(0) foils, and a layer of FeCO_(3) covered the FePO_(4) crystals. We propose that cells of Prolixibacter sp. MIC1-1 accept electrons directly from Fe~(0) to reduce nitrate.
机译：金属材料的受微生物影响的腐蚀（MIC）带来了沉重的经济负担。通常将厌氧条件下金属铁（Fe〜（0））的MIC机理解释为氢营养型微生物消耗阴极氢，从而加速阳极Fe〜（0）的氧化。在这项研究中，我们描述了一种非还原性硝酸盐还原细菌MIC1-1诱导的Fe〜（0）腐蚀，该细菌是从日本秋田的一个油井收集的原油样品中分离出来的。该应变需要特定的电子供体-受体组合和有机碳源才能生长。例如，该菌株在硝酸盐作为唯一的电子受体，而丙酮酸作为碳源，Fe〜（0）作为唯一的电子供体，在厌氧条件下生长。另外，亚铁离子和l-半胱氨酸充当电子给体，而分子氢则不起作用。根据16S rRNA基因序列的系统发育分析表明，菌株MIC1-1是拟杆菌属的螺旋杆菌属。因此，Prolixibacter sp.。 MIC1-1菌株是属于拟杆菌门的第一个腐蚀Fe〜（0）的代表。在厌氧条件下，Prolixibacter sp.。 MIC1-1伴随着硝酸盐的还原而腐蚀Fe〜（0），该菌株的铁溶解量是无菌对照的六倍。扫描电子显微镜分析表明，在Fe〜（0）箔的表面上形成了FePO_（4）的微观晶体，并且一层FeCO_（3）覆盖了FePO_（4）晶体。我们建议Prolixibacter sp。的细胞。 MIC1-1直接从Fe〜（0）接受电子以还原硝酸盐。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号