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首页> 外文期刊>Environmental Science & Technology >Persistent Source Influences on the Trailing Edge of a Groundwater Plume, and Natural Attenuation Timeframes: The F-Area Savannah River Site
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Persistent Source Influences on the Trailing Edge of a Groundwater Plume, and Natural Attenuation Timeframes: The F-Area Savannah River Site

机译：持久源对地下水羽流后缘的影响以及自然衰减时间框架：F区域萨凡纳河站点

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摘要

At the Savannah River Site's F-Area, wastewaters containing radionuclides were disposed into seepage basins for decades. After closure and capping in 1991, the U.S. Department of Energy (DOE) has being monitoring and remediating the groundwater plume. Despite numerous studies of the plume, its persistence for over 20 years has not been well understood. To better understand the plume dynamics, a limited number of deep boreholes were drilled to determine the current plume characteristics. A mixing model was developed to predict plume tritium and nitrate concentrations. We found that the plume trailing edges have emerged for some contaminants, and that contaminant recharge from the basin's vadose zone is still important. The model's estimated time-dependent basin drainage rates combined with dilution from natural recharge successfully predicted plume tritium and nitrate concentrations. This new understanding of source zone influences can help guide science- based remediation, and improve predictions of the natural attenuation timeframes.
机译：在萨凡纳河工地的F区，含有放射性核素的废水进入渗漏池已有数十年的历史了。在1991年关闭并封顶后，美国能源部（DOE）一直在监测和修复地下水中的羽状流。尽管对烟羽进行了大量研究，但对于烟羽的持久性已有20多年的了解了。为了更好地了解羽流动力学，钻了有限数量的深孔以确定当前的羽流特征。建立了混合模型以预测烟羽中and和硝酸盐的浓度。我们发现，羽流后缘已经出现了一些污染物，从盆地的渗流带中补充污染物仍然很重要。该模型的估计时间依赖性流域排水速率与自然补给的稀释相结合，成功地预测了烟羽中and和硝酸盐的浓度。对源区影响的这种新理解可以帮助指导基于科学的修复，并改善对自然衰减时间框架的预测。

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  • 来源
    《Environmental Science & Technology》 |2012年第8期|p.4490-4497|共8页
  • 作者

    Jiamin Wan; Tetsu K. Tokunaga; Wenming Dong; Miles E. Denham; Susan S. Hubbard;

  • 作者单位

    Earth Sciences Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, California;

    Earth Sciences Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, California;

    Earth Sciences Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, California;

    Savannah River National Laboratory (SRNL), Aiken, South Carolina;

    Earth Sciences Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, California;

  • 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);
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  • 正文语种 eng
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