Project 7: Low Concentration Vapor Exposures in Complex Systems and the Problem

项目7：复杂系统中的低浓度蒸汽暴露及其问题

• 批准号: 7623391
• 负责人: Eric M Suuberg
• 金额: $ 23.17万
• 依托单位: BROWN UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7623391
• 关键词: 3-Dimensional; Accounting; Acids; Address; Affect; Aromatic Compounds; Basic Science; Behavior; Biodegradation; Biological; Breathing; Carbon Black; Collaborations; Complex; Data; Development; Educational Intervention; Ensure; Environment; Environmental Pollution; Equilibrium; Experimental Models; Funding; Goals; Grant; Health; Heterogeneity; Human; Investigation; Kinetics; Laboratories; Liquid substance; Measurement; Measures; Mechanics; Modeling; Pathway interactions; Phase; Play; Process; Research; Review Literature; Rhode Island; Risk; Role; Site; Soil; Solid; Solvents; Source; Structure; Superfund; System; Techniques; Time; Validation; Work; aqueous; base; design; exposed human population; interest; migration; novel; pressure; programs; remediation; tool; vapor

This project is concerned with the factors that determine one aspect of human exposure potentials on contaminated sites. The focus is on vapor inhalation potential. The project involves a combined experimental and modeling study, and has a particular emphasis on mixtures and how these influence the exposure processes. The modeling portion of the study involves further development and validation of a threedimensional computational fluid dynamics model that includes the many variables that can play a role in determining exposures. Earlier models of vapor intrusion have often involved simple one-dimensional descriptions of the phenomenon, and are not adequate for describing the actual situation in the field. Likewise, we are interested in examining transient effects that have been explored to a limited degree in such models. The aim here is to provide a robust tool, based on a commercial computational platform, that will allow regulators and other concerned parties access to modeling results, permitting more effective guiding of site investigation and remediation efforts. This portion of the program will involve close collaboration with our state agency partners, in providing access to new detailed site characterization information necessary for model validation. At the same time, we will continue an experimental examination of many of the factors that play an important role in determining vapor concentrations in mixed environments. The influence of different parts of the actual soil matrix will also be examined for such systems (e.g., black carbons, humic acids, moisture, other free-phase NAPLs). Specific Aims of this project: 1. To obtain new experimental data on SVOC mixtures of relevance in vapor exposure scenarios. 2. To continue to develop a robust 3-dimensional model of the vapor intrusion phenomenon, including transient effects, complicated geologies, biodegradation and partitioning. 3. Experimentally explore the partitioning of vapors in the subsurface on black carbon, soil, moisture, NAPL/NAPS as an input to the model in 2 above. 4. Work with state partners to validate the modeling approach with real field data, and make the model available to them as a regulatory tool.

该项目关注的是决定人类暴露潜力的某一方面的因素。 受污染的地点。重点是蒸气吸入潜力。该项目涉及一个联合实验 和建模研究，特别强调混合物以及它们如何影响暴露 流程。该研究的建模部分涉及三维模型的进一步开发和验证 计算流体动力学模型，包括许多可以发挥作用的变量 确定暴露。早期的蒸汽入侵模型通常涉及简单的一维 现象的描述，不足以描述该领域的实际情况。 同样，我们有兴趣检查瞬态效应，这些效应已在有限程度上被探索过。 这样的模型。这里的目的是提供一个基于商业计算平台的强大工具， 将允许监管机构和其他相关方获取建模结果，从而更有效地 指导现场调查和修复工作。这部分计划将涉及密切 与我们的国家机构合作伙伴合作，提供对新的详细场地特征的访问 模型验证所需的信息。同时，我们将继续进行实验检验 在确定混合环境中的蒸汽浓度方面发挥重要作用的许多因素。 对于此类系统，还将检查实际土壤基质不同部分的影响（例如，黑色 碳、腐殖酸、水分、其他游离相 NAPL）。 该项目的具体目标： 1. 获得与蒸气暴露场景相关的 SVOC 混合物的新实验数据。 2. 继续开发蒸汽入侵现象的稳健 3 维模型，包括 瞬态效应、复杂的地质、生物降解和分配。 3. 实验探索地下蒸气对黑碳、土壤、水分、 NAPL/NAPS 作为上面 2 中模型的输入。 4. 与国家合作伙伴合作，用真实的现场数据验证建模方法，并制作模型 可供他们作为监管工具。