School of Engineering, Brown University, Providence, RI 02912, USA.
Chemosphere. 2014 Jan;95:140-9. doi: 10.1016/j.chemosphere.2013.08.051. Epub 2013 Sep 10.
The inhalation of volatile and semi-volatile organic compounds that intrude from a subsurface contaminant source into indoor air has become the subject of health and safety concerns over the last twenty years. Building subslab and soil gas contaminant vapor concentration sampling have become integral parts of vapor intrusion field investigations. While numerical models can be of use in analyzing field data and in helping understand the subslab and soil gas vapor concentrations, they are not widely used due to the perceived effort in setting them up. In this manuscript, we present a new closed-form analytical expression describing subsurface contaminant vapor concentrations, including subslab vapor concentrations. The expression was derived using Schwarz-Christoffel mapping. Results from this analytical model match well the numerical modeling results. This manuscript also explores the relationship between subslab and exterior soil gas vapor concentrations, and offers insights on what parameters need to receive greater focus in field studies.
在过去的二十年中，从地下污染物源侵入室内空气中的挥发性和半挥发性有机化合物的吸入已成为健康和安全问题的关注焦点。建筑物地基和土壤气体污染物蒸气浓度采样已成为蒸气入侵现场调查的重要组成部分。虽然数值模型可用于分析现场数据并帮助理解地基和土壤气体蒸气浓度，但由于认为设置它们的工作量很大，因此并未广泛使用。在本文中，我们提出了一个新的封闭形式的解析表达式，用于描述地下污染物蒸气浓度，包括地基蒸气浓度。该表达式是使用 Schwarz-Christoffel 映射推导出来的。该解析模型的结果与数值建模结果吻合良好。本文还探讨了地基和外部土壤气体蒸气浓度之间的关系，并提供了有关现场研究中需要更加关注哪些参数的见解。
