...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Adsorption and Incorporation of Arsenic to Biogenic Lepidocrocite Formed in the Presence of Ferrous Iron during Denitrification by Paracoccus denitrificans
【24h】

Adsorption and Incorporation of Arsenic to Biogenic Lepidocrocite Formed in the Presence of Ferrous Iron during Denitrification by Paracoccus denitrificans

机译：亚铁副球菌反硝化过程中亚铁存在下形成的生物铁硅铁矿对砷的吸附和结合。

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

We demonstrate adsorption and partial incorporation of arsenic, in its soluble form, either as arsenite or arsenate into lepidocrocite (gamma-FeOOH), which was formed through nitrite-driven Fe(II) oxidation by Paracoccus denitrificans under nitrate-reducing conditions. Fe and As Kedge XANES and radial distribution functions of Fourier transformed EXAFS spectra showed that portions of As were found to be incorporated in the biogenic lepidocrocite, in addition to higher portions of adsorbed As. We suggest that denitrifying bacteria such as Paracoccus denitrificans, studied here, could facilitate decrease of aqueous arsenic As(III) and/or As(V) through indirect Fe(II) oxidation to solid phase iron minerals, here as lepidocrocite, by the denitrification product nitrite in the presence of nitrate, ferrous iron, and arsenic, under certain environmental conditions where these materials could be found, such as in As-contaminated paddy soils and wetlands.
机译：我们展示了砷的可溶形式（砷或砷酸盐）的吸附和部分掺入到纤铁矿（γ-FeOOH）中，这是通过亚硝酸盐驱动的反硝化副球菌在硝酸盐还原条件下通过亚硝酸盐驱动的Fe（II）氧化而形成的。 Fe和As Kedge XANES以及傅立叶变换EXAFS光谱的径向分布函数表明，除了吸附的As的较高部分之外，还发现部分As被掺入了生物硅铁云母中。我们建议，本文研究的反硝化细菌（如反硝化副球菌）可通过反硝化作用将Fe（II）间接氧化为固相铁矿物质（如铁云母），从而促进砷（III）和/或砷（V）水溶液的还原。在某些环境条件下（例如在被As污染的稻田和湿地中），在硝酸盐，亚铁和砷存在的条件下生成亚硝酸盐。

著录项

  • 来源
    《Environmental Science & Technology》 |2018年第17期|9983-9991|共9页
  • 作者

    Park Sunhwa; Lee Ji-Hoon; Shin Tae Joo; Hur Hor-Gil; Kim Min Gyu;

  • 作者单位

    GIST, Sch Earth Sci & Environm Engn, 123 Cheomdan Gwagiro, Gwangju 61005, South Korea;

    Chonbuk Natl Univ, Dept Bioenvironm Chem, Jeonju 54896, South Korea;

    UNIST, UNIST Cent Res Facil, Ulsan 44919, South Korea;

    GIST, Sch Earth Sci & Environm Engn, 123 Cheomdan Gwagiro, Gwangju 61005, South Korea;

    Pohang Univ Sci & Technol, PAL, Pohang 37673, South Korea;

  • 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