...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Gas-phase and Transpiration-driven Mechanisms for Volatilization through Wetland Macrophytes
【24h】

Gas-phase and Transpiration-driven Mechanisms for Volatilization through Wetland Macrophytes

机译：气相和蒸腾驱动的湿地大型植物挥发机制

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

Natural and constructed wetlands have gained attention as potential tools for remediation of shallow sediments and groundwater contaminated with volatile organic compounds (VOCs). Wetland macrophytes are known to enhance rates of contaminant removal via volatilization, but the magnitude of different volatilization mechanisms, and the relationship between volatilization rates and contaminant physiochemical properties, remain poorly understood. Greenhouse mesocosm experiments using the volatile tracer sulfur hexafluoride were conducted to determine the relative magnitudes of gas-phase and transpiration-driven volatilization mechanisms. A numerical model for vegetation-mediated volatilization was developed, calibrated with tracer measurements, and used to predict plant-mediated volatilization of common VOCs as well as quantify the contribution of different volatilization pathways. Model simulations agree with conclusions from previous work that transpiration is the main driver for volatilization of VOCs, but also demonstrate that vapor-phase transport in wetland plants is significant, and can represent up to 50% of the total flux for compounds with greater volatility like vinyl chloride.
机译：天然和人工湿地已成为潜在的工具，用于补救被挥发性有机化合物（VOC）污染的浅层沉积物和地下水。众所周知，湿地大型植物可通过挥发提高污染物去除的速度，但对不同挥发机制的大小以及挥发速率与污染物理化特性​​之间的关系知之甚少。使用挥发性示踪剂六氟化硫进行了温室介观实验，以确定气相和蒸腾作用驱动的挥发机制的相对大小。建立了植被介导的挥发的数值模型，并用示踪剂测量进行了校准，并用于预测常见VOC的植物介导的挥发以及量化不同挥发途径的贡献。模型模拟与先前工作得出的结论一致，即蒸腾作用是挥发性有机化合物挥发的主要驱动力，但也表明湿地植物中的气相传输非常重要，对于挥发性较大的化合物，其可占总通量的50％。氯乙烯。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第10期|p.5344-5352|共9页
  • 作者

    Matthew C. Reid; Peter R. Jaffe;

  • 作者单位

    Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544, United States;

    Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544, 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