...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Formation of Soluble Mercury Oxide Coatings: Transformation of Elemental Mercury in Soils
【24h】

Formation of Soluble Mercury Oxide Coatings: Transformation of Elemental Mercury in Soils

机译：可溶性氧化汞涂层的形成：土壤中元素汞的转化

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

The impact of mercury (Hg) on human and ecological health has been known for decades. Although a treaty signed in 2013 by 147 nations regulates future large-scale mercury emissions, legacy Hg contamination exists worldwide and small-scale releases will continue. The fate of elemental mercury, Hg(0), lost to the subsurface and its potential chemical transformation that can lead to changes in speciation and mobility are poorly understood. Here, we show that Hg(0) beads interact with soil or manganese oxide solids and X-ray spectroscopic analysis indicates that the soluble mercury coatings are HgO. Dissolution, studies show that, after reacting with a composite soil, ＞20 times more Hg is released into water from the coated beads than from a pure liquid mercury bead. An even larger, ＞700 times, release occurs from coated Hg(0) beads that have been reacted with manganese oxide, suggesting that manganese oxides are involved in the transformation of the Hg(0) beads and creation of the soluble mercury coatings. Although the coatings may inhibit Hg(0) evaporation, the high solubility of the coatings can enhance Hg(Ⅱ) migration away from the Hg(0)-spill site and result in potential changes in mercury speciation in the soil and increased mercury mobility.
机译：汞（Hg）对人类和生态健康的影响已有数十年了。尽管由147个国家/地区在2013年签署的条约对未来的大规模汞排放进行了规定，但全球范围内仍存在传统的汞污染，并且小规模排放仍将继续。人们对汞的命运，Hg（0）丢失到地下及其潜在的化学转化（可能导致物种和迁移率发生变化）的了解很少。在这里，我们显示Hg（0）珠与土壤或氧化锰固体相互作用，并且X射线光谱分析表明可溶性汞涂层为HgO。溶出度研究表明，与复合土壤反应后，包覆的珠粒向水中释放的汞比纯液态汞珠粒释放的汞高20倍以上。大于700倍的释放是从已与氧化锰反应的涂覆Hg（0）珠发生的，这表明氧化锰参与了Hg（0）珠的转化和可溶性汞涂层的形成。尽管涂层可以抑制Hg（0）的蒸发，但是涂层的高溶解度却可以增强Hg（Ⅱ）从Hg（0）溢出部位的迁移，并导致土壤中汞形态的潜在变化和汞迁移率的提高。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第20期|12105-12111|共7页
  • 作者

    Carrie L. Miller; David B. Watson; Brian P. Lester; Jane Y. Howe; Debra H. Phillips; Feng He; Liyuan Liang; Eric M. Pierce;

  • 作者单位

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States,Troy University, Troy, Alabama 36082, United States;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States,Hitachi High Technologies Canada, Incorporated, Toronto, Ontario M9W 6A4, Canada;

    Queen's University Belfast, Belfast BT7 1NN, United Kingdom;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States,College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, People's Republic of China;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States;

    Environmental Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, 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