• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Environmental Health Perspectives >Experimental investigations of the entrapment and persistence of organic liquid contaminants in the subsurface environment.
【2h】

Experimental investigations of the entrapment and persistence of organic liquid contaminants in the subsurface environment.

机译：地下环境中有机液体污染物的截留和持久性的实验研究。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Organic liquids are common polluters of the subsurface environment. Once released, these nonaqueous phase liquids (NAPLs) tend to become entrapped within soils and geologic formations where they may serve as long-term contaminant reservoirs. The interphase mass transfer from such entrapped residuals will ultimately control environmental exposure levels as well as the persistence and/or remedial recovery of these contaminants in the subsurface. This paper summarizes National Institute of Environmental Health Sciences-sponsored research designed to investigate and quantify NAPL entrapment and interphase mass transfer in natural porous media. Results of soil column and batch experiments are presented that highlight research findings over the past several years. These experiments explore dissolution and volatilization of hydrocarbons and chlorinated solvents in sandy porous media. Initial concentration levels and long-term recovery rates are shown to depend on fluid flow rate, soil structure, NAPL composition, and soil wetting characteristics. These observations are explained in the context of conceptual models that describe entrapped NAPL morphology and boundary layer transport. The implications of these laboratory findings on the subsurface persistence and recovery of entrapped NAPLs are discussed.
机译：有机液体是地下环境的常见污染源。一旦释放，这些非水相液体（NAPL）就会被截留在土壤和地质构造中，并在其中充当长期的污染物库。来自这些残留物的相间质量转移将最终控制环境暴露水平以及这些污染物在地下的持久性和/或补救性恢复。本文总结了美国国家环境卫生科学研究所（NIH）赞助的旨在研究和量化自然多孔介质中NAPL截留和相间传质的研究。提出了土壤柱和分批实验的结果，突出了过去几年的研究成果。这些实验探索了沙质多孔介质中碳氢化合物和氯化溶剂的溶解和挥发。初始浓度水平和长期回收率显示取决于流体流速，土壤结构，NAPL组成和土壤润湿特性。这些观察结果在描述被困NAPL形态和边界层传输的概念模型的背景下进行了解释。讨论了这些实验室研究结果对被困NAPL的地下持久性和恢复的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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