Fate and Transport of Contaminants in Aging Piping Systems

老化管道系统中污染物的归宿和迁移

• 批准号: 10596289
• 负责人: Kelly G Pennell
• 金额: $ 16.64万
• 依托单位: UNIVERSITY OF KENTUCKY
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-07 至 2025-01-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10596289
• 关键词: Address; Aging; Air; Analytical Chemistry; Biological Monitoring; Biomedical Research; Calibration; California; Communication; Communities; Computer Models; Coupled; Data; Data Analyses; Deterioration; Ensure; Environment; Environmental Engineering technology; Environmental Exposure; Environmental Hazards; Environmental Health; Environmental Pollutants; Environmental Science; Equation; Ethylenes; Evidence based practice; Foundations; Fracture; Gases; Goals; Hazardous Waste; Health; Human; Individual; Indoor Air Quality; Industry; Infrastructure; Inhalation Exposure; Interview; Joints; Kentucky; Knowledge; Measurement; Measures; Membrane; Modeling; North Carolina; Outcome; Outcome Study; Pathway interactions; Policies; Poly-fluoroalkyl substances; Polymers; Public Health; Regulation; Reporting; Research; Research Project Grants; Risk; Risk Management; Risk Reduction; Route; Sampling; Science; Services; Site; Superfund; Surveys; System; Techniques; Temperature; Testing; Tetrachloroethylene; Time; Toxic effect; Transcend; Translational Research; Transport Process; Trichloroethylene; Uncertainty; United States; Volatilization; Water; Water Supply; aged; base; community engagement; contaminant transport; data interoperability; data management; data modeling; drinking; drinking water; engineering design; epidemiology study; field study; ground water; health literacy; hookah; indoor air; informant; mass flux; novel; nutrition; predictive modeling; pressure; prevent; research facility; sensor; sensor technology; stakeholder perspectives; superfund chemical; superfund site; tool; vapor intrusion; ventilation; water quality

PROJECT SUMMARY Millions of miles of water and sewer piping systems are currently buried across the United States. Near sites contaminated with hazardous wastes, pipe deterioration provides pathways for contaminant entry and transport to surrounding communities. One challenge of leaking sewer pipes near Superfund sites involves volatilization of contaminants that enter subsurface pipes, posing indoor inhalation exposure risks. In drinking water piping systems, pipe fractures coupled with pressure transients within the piping system allow subsurface contaminants to enter the system—especially at contaminated sites where such breaks become conduits impacting water quality. This project provides strategies to reduce and prevent exposure risks to environmental contaminants, especially chlorinated ethenes and per- and polyfluoroalkyl substances (PFAS) that result from leaking and damaged subsurface piping networks. The overarching project goal is to combine piping infrastructure science with fate and transport science to identify and reduce exposure risks associated with trichloroethene (TCE), tetrachloroethene (PCE), and PFAS. To achieve this goal, we propose three specific aims: 1) To measure mass flux of contaminants at field sites where TCE and PCE exposure risks are impacted by piping networks; evaluate flow and pressure field data from drinking water systems; and, determine the effect of broken or failed piping components and joints in lab settings 2) To develop models that: a) predict mass flux of contaminants to indoor air and evaluate exposure risks; b) predict mass flux of contaminants through piping networks; and, 3) To use stakeholder input and stochastic analyses to characterize model uncertainty and sensitivity in an effort to develop stakeholder-relevant solutions that reduce and prevent exposure risks. The specific aims integrate advanced computational modeling approaches with field measurements collected from piping systems in Eastern Kentucky and at a start-of-the-art vapor intrusion research facility near a Superfund site. Comparing data from different measurement techniques, including a novel sensor technology, provides information about temporal variability of sewer gas mass flux which is critical due to the high level of uncertainty that surrounds environmental exposure risks. The research team aims to bolster a paradigm shift in the way uncertain exposure risks are managed and develop solutions to reduce exposure risks in ways that are acceptable to communities. Risk communication science will inform strategies to evaluate uncertainty using stakeholder perspectives and evidence-based practices as a framework to promote solution-oriented research and environmental health literacy.

项目摘要 目前，数百万英里的供水和下水道管道系统埋在美国各地。附近景点 由于受到危险废物的污染，管道的恶化为污染物的进入和运输提供了通道 到周边社区。超级基金所在地附近下水道管道泄漏的一个挑战涉及挥发 污染物进入地下管道，造成室内吸入暴露风险。饮用水管道 系统，管道破裂加上管道系统内的压力瞬变允许地下 污染物进入系统-特别是在污染的地点，这种突破成为管道 影响水质。该项目提供了减少和预防环境风险的战略， 污染物，特别是氯化乙烯和全氟和多氟烷基物质（PFAS）， 泄漏和地下管道网络受损。总体项目目标是将联合收割机管道 基础设施科学与最终结果和迁移科学，以确定和减少 三氯乙烯（TCE）、四氯乙烯（PCE）和PFAS。为了实现这一目标，我们提出了三个具体措施。 目的：1）测量TCE和PCE暴露风险受到影响的现场污染物的质量通量 通过管道网络;评估饮用水系统的流量和压力场数据;并确定 实验室环境中破裂或失效的管道组件和接头的影响2）开发模型，以：a）预测 污染物进入室内空气的质量通量，并评估暴露风险; B）预测污染物的质量通量 通过管网;以及，3）使用利益相关者输入和随机分析来表征模型 不确定性和敏感性，以努力制定减少和防止 暴露风险。具体目标是将先进的计算建模方法与领域 从肯塔基州东部的管道系统和最先进的蒸汽侵入处收集的测量结果 超级基金基地附近的一个研究机构比较来自不同测量技术的数据，包括 新的传感器技术，提供有关下水道气体质量通量的时间变化的信息， 由于围绕环境暴露风险的高度不确定性，这一点至关重要。研究团队 旨在支持不确定风险敞口管理方式的范式转变，并开发解决方案， 以社区可接受的方式减少接触风险。风险沟通科学将告知 利用利益相关者的观点和循证实践评估不确定性的战略， 促进以解决问题为导向的研究和环境卫生知识普及的框架。