...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Accumulating Mercury and Methylmercury Burdens in Watersheds Impacted by Oil Sands Pollution
【24h】

Accumulating Mercury and Methylmercury Burdens in Watersheds Impacted by Oil Sands Pollution

机译：受油砂污染影响的流域中汞和甲基汞负荷的累积

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

Bitumen mining and upgrading in northeastern Alberta, Canada, releases toxic pollutants into the atmosphere, including mercury (Hg) and methylmercury (MeHg). This Hg and MeHg is then deposited to the surrounding landscape; however, the fate of these contaminants remains unknown. Here, we compare snowpack chemistry to high-frequency measurements of river water quality across six watersheds (five impacted by oil sands development and one unimpacted). Catchment scale snowpack Hg and MeHg loads normalized to watershed area were highest near oil sands operations. River water Hg concentrations and loads tracked discharge and tended to be higher downstream of mining operations, while MeHg concentrations and loads increased through the summer, reflecting peak summer MeHg production rates. Except in the reference watershed, snowpack Hg and MeHg loads equaled or exceeded the amount of Hg and MeHg exported during freshet and, in some cases, the entire hydrologic year. This suggests landscapes across the oil sands region, which are dominated by low-relief wetlands and other shallow-water systems, are accumulating Hg and MeHg. Importantly, during years of high discharge, these low-relief systems appear to become better connected and flush MeHg (and Hg) from the watershed. Thus, these watersheds may act as temporary, rather than as permanent, natural repositories of oil sands contaminants.
机译：在加拿大艾伯塔省东北部的沥青开采和升级，将有毒污染物释放到大气中，包括汞（Hg）和甲基汞（MeHg）。然后将这些汞和甲基汞沉积到周围的景观中；但是，这些污染物的命运仍然未知。在这里，我们将积雪化学与高频流域六个河流域水质的测量结果进行了比较（其中五个受油砂发育影响，一个未受影响）。在油砂作业附近，流域规模积雪的汞和甲基汞负荷归一化到分水岭地区最高。河流水中的汞浓度和负荷跟踪排放，并且在采矿作业的下游趋于较高，而整个夏天的甲基汞浓度和负荷增加，反映了夏季甲基汞的最高产量。除参考流域外，积雪中的汞和甲基汞负荷等于或超过在新生期以及某些情况下整个水文年中出口的汞和甲基汞的量。这表明由低浮雕湿地和其他浅水系统主导的油砂地区的景观正在积累Hg和MeHg。重要的是，在高流量的几年中，这些低浮雕系统似乎变得更好连接，并从分水岭冲刷了MeHg（和Hg）。因此，这些流域可以充当油砂污染物的临时而非永久的天然储存库。

著录项

  • 来源
    《Environmental Science & Technology》 |2019年第21期|12856-12864|共9页
  • 作者

    Wasiuta Vivian; Kirk Jane L.; Chambers Patricia A.; Alexander Alexa C.; Wyatt Faye R.; Rooney Rebecca C.; Cooke Colin A.;

  • 作者单位

    Univ Alberta Dept Earth & Atmospher Sci 1-26 Earth Sci Bldg Edmonton AB T6G 2E3 Canada;

    Environm & Climate Change Canada Water Sci & Technol Directorate 867 Lakeshore Rd Burlington ON L7R 4A6 Canada;

    Univ New Brunswick Dept Biol Environm & Climate Change Canada Water Sci & Technol Directorate 10 Bailey Dr Fredericton NB E3B 5A3 Canada;

    Alberta Environm & Pk Environm Monitoring & Sci Div 9888 Jasper Ave Edmonton AB T5J 5C6 Canada;

    Univ Waterloo Dept Biol ESC 350 200 Univ Ave Waterloo ON N2L 3G1 Canada;

    Univ Alberta Dept Earth & Atmospher Sci 1-26 Earth Sci Bldg Edmonton AB T6G 2E3 Canada|Alberta Environm & Pk Environm Monitoring & Sci Div 9888 Jasper Ave Edmonton AB T5J 5C6 Canada;

  • 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