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首页> 外文期刊>Journal of Hazardous Materials >Cr(Ⅵ) reduction by a potent novel alkaliphilic halotolerant strain Pseudochrobactrum saccharolyticum LY10
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Cr(Ⅵ) reduction by a potent novel alkaliphilic halotolerant strain Pseudochrobactrum saccharolyticum LY10

机译：新型强碱性耐盐菌株Pseudochrobactrum saccharolyticum LY10还原Cr（Ⅵ）

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摘要

A novel Cr(Ⅵ)-reducing strain, Pseudochrobactrum saccharolyticum LY10, was isolated and characterized for its high Cr(Ⅵ)-reducing ability. Strain LY10 had typical characteristics of alkali-tolerance and halotolerance. Kinetic analysis indicated that the maximum reduction rate was achieved under optimum conditions with initial pH 8.3, 20 gL~(-1) NaCl, 55mgL~(-1) Cr(Ⅵ), and 1.47 × 10~9 cells mL~(-1) of cell concentration. Further mechanism studies verified that the removal of Cr(Ⅵ) was mainly achieved by a metabolism-dependent bioreduction process. Strain LY10 accumulated chromium both in and around the cells, with cell walls acting as the major binding sites for chromium. X-ray absorption near-edge structure (XANES) analysis further confirmed that the chromium immobilized by the cells was in the Cr(Ⅲ) state. In the present study, Pseudochrobactrum saccharolyticum was, for the first time, reported to be a Cr(Ⅵ)-reducing bacteria. Results from this research would provide a potential candidate for biore-mediation of Cr(Ⅵ)-contaminated environments, especially alkaline and saline milieus with Cr(Ⅵ) at low-to-mid concentrations.
机译：分离出一种新的还原Cr（Ⅵ）的菌株，拟糖化拟杆菌（Pseudochrobactrum saccharolyticum）LY10，并表征了其高Cr（Ⅵ）的还原能力。 LY10菌株具有典型的耐碱和耐盐性。动力学分析表明，在初始pH 8.3、20 gL〜（-1）NaCl，55mgL〜（-1）Cr（Ⅵ）和1.47×10〜9个细胞mL〜（-1）的最佳条件下可实现最大还原速率。 ）的细胞浓度。进一步的机理研究证明，Cr（Ⅵ）的去除主要是通过代谢相关的生物还原过程实现的。 LY10菌株在细胞内和细胞周围积累铬，细胞壁是铬的主要结合位点。 X射线吸收近边缘结构（XANES）分析进一步证实了被细胞固定的铬处于Cr（Ⅲ）状态。在本研究中，首次报道解糖假单胞菌是还原Cr（Ⅵ）的细菌。这项研究的结果将为生物修复受Cr（Ⅵ）污染的环境提供潜在的候选者，特别是在中低浓度下用Cr（Ⅵ）对碱性和盐水环境进行生物修复。

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  • 来源
    《Journal of Hazardous Materials》 |2013年第15期|24-32|共9页
  • 作者

    Dongyan Long; XianjinTang; KuanCai; GuangcunChen; Linggui Chen; Dechao Duan; Jun Zhu; Yingxu Chen;

  • 作者单位

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

    Global Environmental Technology Co., Ltd.. Gudun Road 656, Hangzhou, 310058. Zhejiang. PR China;

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

    Global Environmental Technology Co., Ltd.. Gudun Road 656, Hangzhou, 310058. Zhejiang. PR China;

    Institute of Environmental Science and Technology, Zhejiang University, Yuhangtang Road 388, Hangzhou. 310058, Zhejiang. PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bioremediation; Cr(Ⅵ) reduction; Pseudochrobactrum saccharolyticum; Alkaliphilic; Halotolerant; X-ray absorption near-edge structure;

    机译：生物修复;Cr（Ⅵ）还原;拟糖假单胞菌;嗜碱的耐盐性X射线吸收近边缘结构;

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