...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Biotic and Abiotic Reduction and Solubilization of Pu(IV)O_2●xH_2O_(am) as Affected by Anthraquinone-2,6-disulfonate (AQDS) and Ethylenediaminetetraacetate (EDTA)
【24h】

Biotic and Abiotic Reduction and Solubilization of Pu(IV)O_2●xH_2O_(am) as Affected by Anthraquinone-2,6-disulfonate (AQDS) and Ethylenediaminetetraacetate (EDTA)

机译：蒽醌-2,6-二磺酸盐（AQDS）和乙二胺四乙酸盐（EDTA）对Pu（IV）O_2●xH_2O_（am）的生物和非生物还原和增溶

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study measured reductive solubilization of plutonium-(Ⅳ) hydrous oxide (Pu(Ⅳ)O_2·xH_2O_(am) with hydrogen (H_2) as electron donor, in the presence or absence of dissimilatory metal-reducing bacteria (DMRB), anthraquinone-2,6-disulfonate (AQDS), and ethylenediaminetetraacetate (EDTA). In PIPES buffer at pH 7 with excess H_2 Shewanella oneidensis and Geobacter sulfurreducens both solubilized <0.001% of 0.5 mM Pu(Ⅳ)O_2·xH_2O_(am) over 8 days, with or without AQDS. However, Pu_(aq) increased by an order of magnitude in some treatments, and increases in solubility were associated with production of Pu(Ⅲ)_(aq). The solid phase of these treatments contained Pu(Ⅲ)(OH)_(3(am)), with more in the DMRB treatments compared with abiotic controls. In the presence of EDTA and AQDS, PuO_2·xH_2O_(am) was completely solubilized by 5. oneidensis and G. sulfurreducens in ～24 h. Without AQDS, bioreductive solubilization was slower (～22 days) and less extensive (～83-94%). In the absence of DMRB, EDTA facilitated reductive solubilization of 89% (without AQDS) to 98% (with AQDS) of the added PuO_2·xH_2O_(am) over 418 days. An in vitro assay demonstrated electron transfer to PuO_2·xH_2O_(am) from the S. oneidensis outer-membrane c-type cytochrome MtrC. Our results (1) suggest that PuO_2·xH_2O_(am) reductive solubilization may be important in reducing environments, especially in the presence of complexing ligands and electron shuttles, (2) highlight the environmental importance of polynuclear, colloidal Pu, (3) provide additional evidence that Pu(Ⅲ)-EDTA is a more likely mobile form of Pu than Pu(Ⅳ)-EDTA, and (4) provide another example of outer-membrane cytochromes and electron-shuttling compounds facilitating bioreduction of insoluble electron acceptors in geologic environments.
机译：本研究测量了在存在或不存在异化金属还原细菌（DMRB），蒽醌-存在下，hydrogen（Ⅳ）O_2·xH_2O_（am）与氢（H_2）作为电子供体的还原增溶作用。 2,6-二磺酸盐（AQDS）和乙二胺四乙酸盐（EDTA）在pH值为7的PIPES缓冲液中，过剩的H_2希瓦氏菌和土杆菌降低了0.5天的0.5 mM Pu（Ⅳ）O_2·xH_2O_（am）的<0.001％在有或没有AQDS的情况下，Pu_（aq）在某些处理中增加了一个数量级，并且溶解度的增加与Pu（Ⅲ）_（aq）的产生有关，这些处理的固相都包含Pu（Ⅲ）。 ）（OH）_（3（am）），在DMRB处理中比非生物对照更多。在EDTA和AQDS存在下，PuO_2·xH_2O_（am）在5〜5中完全溶解。在没有AQDS的情况下24小时，生物还原增溶作用较慢（〜22天），而增溶作用较弱（〜83-94％）。在418天内，将添加的PuO_2·xH_2O_（am）的89％（无AQDS）还原为98％（有AQDS）。体外试验表明，电子从拟南芥外膜c型细胞色素MtrC转移到PuO_2·xH_2O_（am）。我们的结果（1）表明PuO_2·xH_2O_（am）还原增溶在还原环境中可能很重要，特别是在存在配体和电子穿梭的情况下；（2）突出了多核胶体Pu对环境的重要性，（3）提供另外的证据表明，Pu（Ⅲ）-EDTA比Pu（Ⅳ）-EDTA更可能是Pu的移动形式，并且（4）提供了另一个例子，即外膜细胞色素和电子穿梭化合物促进了地质中不溶性电子受体的生物还原。环境。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第4期|p.2132-2140|共9页
  • 作者

    Andrew E. Plymale; Vanessa L. Bailey; James K. Fredrickson; Steve M. Heald; Edgar C. Buck; Liang Shi; Zheming Wang; Charles T. Resch; Dean A. Moored; Harvey Bolton Jr;

  • 作者单位

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

    Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, United States;

  • 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

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