...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Micropollutant Dynamics in Vidy Bay-A Coupled Hydrodynamic-Photolysis Model to Assess the Spatial Extent of Ecotoxicological Risk
【24h】

Micropollutant Dynamics in Vidy Bay-A Coupled Hydrodynamic-Photolysis Model to Assess the Spatial Extent of Ecotoxicological Risk

机译：Vidy湾中的微污染物动力学-耦合水动力-光解模型以评估生态毒理学风险的空间范围

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 direct discharge of effluent wastewater into Vidy Bay (Lake Geneva) results in the formation of an effluent plume with locally high concentrations of wastewater-derived micropollutants. The micropollutant hotspots above the wastewater outfall present a potential ecotoxicological risk, yet the spatial extent of the plume and the associated ecotoxicological risk zone remain unclear. This work combines the two main processes affecting the spreading of the plume, namely dilution of micropollutants due to mixing and degradation by photolysis, into a coupled hydrodynamic-photolysis model, with which we estimated the spatial extent of the risk zone in Vidy Bay. The concentration of micropollutants around the wastewater outfall was simulated for typical wind scenarios and seasons relevant to Vidy Bay, and the resulting ecotoxicological risk was evaluated. Specifically, we determined the direct and indirect photolysis rate constants for 24 wastewater-derived micropollutants and implemented these in a hydrodynamic particle tracking model, which tracked the movement of water parcels from the wastewater outfalL Simulations showed that owing to thermal stratification, the zone of ecotoxicological risk is largest in summer and extends horizontally over 300 m from the outfall. Photolysis processes contribute to reducing the plume extent mainly under unstratified conditions when the plume surfaces. Moreover, it was shown that only a few compounds, mainly antibiotics, dominate the total ecotoxicological risk.
机译：废水直接排放到Vidy Bay（日内瓦湖）中时，会形成废水羽流，并局部含有高浓度的废水中的微污染物。废水排放口上方的微污染物热点存在潜在的生态毒理风险，但羽流的空间范围和相关的生态毒理风险区仍不清楚。这项工作将影响烟羽散布的两个主要过程（即由于混合和光解降解引起的微污染物的稀释）组合到一个耦合的水动力-光解模型中，利用该模型我们可以估算维迪湾风险区的空间范围。针对典型的风场和与维迪湾有关的季节，模拟了废水排放口周围的微污染物浓度，并对产生的生态毒理风险进行了评估。具体来说，我们确定了24种废水衍生的微污染物的直接和间接光解速率常数，并在流体动力学颗粒跟踪模型中实现了该模型，该模型跟踪了废水外围的水包运动。模拟显示，由于热分层，生态毒理学区域夏季的风险最大，从排污口开始水平延伸超过300 m。光解过程主要在烟羽表面未分层的情况下有助于减少烟羽程度。此外，研究表明，只有少数化合物（主要是抗生素）在整个生态毒理风险中占主导地位。

著录项

  • 来源
    《Environmental Science & Technology》 |2013年第16期|9207-9216|共10页
  • 作者

    Florence Bonvin; Amir M. Razmi; David A. Barry; Tamar Kohn;

  • 作者单位

    Environmental Chemistry Laboratory, Ecole Polytechnique Federate de Lausanne (EPFL), Lausanne, Switzerland;

    Ecological Engineering Laboratory, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland;

    Ecological Engineering Laboratory, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland;

    Environmental Chemistry Laboratory, Ecole Polytechnique Federate de Lausanne (EPFL), Lausanne, Switzerland;

  • 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