Exposure Assessment Tools for Multiple Pollutants

多种污染物的暴露评估工具

• 批准号: 6821645
• 负责人: YANBO PANG
• 金额: $ 7.47万
• 依托单位: UNIVERSITY OF CALIF-LAWRENC BERKELEY LAB
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6821645
• 关键词: aerosols; air filtration; air pollution; air sampling /monitoring; biomedical equipment development; diffusion; environmental exposure; hazardous substances; model; model design /development; organic chemicals; ozone; particle; portable biomedical equipment; sodium bicarbonate; vapor

DESCRIPTION: We propose to develop coated porous media for human exposure assessment for airborne pollutants. After developing and validating extractable sorbent-coated foam as denuders for volatile and semi-volatile organic gases, the denuders will be incorporated into prototype multiple pollutant personal samplers (MPPS) for both gases and particles. The project builds on recent progress in personal sampling using activated carbon-impregnated open-cell foam. The first step involves creating an empirical model to predict the collection efficiency of coated foam. The model will be developed by measuring the SO2 collection efficiency of foam materials that have been coated with a weak base such as sodium bicarbonate. The results of chamber experiments with SO2 will be used to predict the diffusion of gas species into the porous structure. The resulting model will be used to design sampler components from extractable sorbent-coated foam, for collection of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). Design of modular multipollutant samplers will be guided by the results of chamber studies that measure organic gas capacity and particle penetration, using environmental tobacco smoke as a test aerosol. Such small (personal data assistant sized) personal samplers could simultaneously measure various workplace and home hazards, such as ozone, VOCs, SVOCs and particulate matter, in a way that minimizes sampling artifacts, at high sensitivity. In addition, this design may be scaled for indoor and outdoor area monitoring.

描述：我们建议开发涂层的多孔培养基，以评估人类的空气传播污染物。在开发和验证可提取吸附剂涂层的泡沫作为挥发性和半挥发性有机气体的裸体泡沫之后，将将裸体剂纳入原型多种污染物个人采样器（MPP）中，以用于气体和颗粒。 该项目以最新的个人抽样进展为基础，使用活性碳浸渍的开孔泡沫。第一步涉及创建一个经验模型来预测涂层泡沫的收集效率。 该模型将通过测量已涂有弱碱（例如碳酸氢钠）的泡沫材料的SO2收集效率。使用SO2的腔室实验的结果将用于预测气体物种向多孔结构的扩散。所得模型将用于设计来自可提取的吸附剂涂层泡沫的采样组件，以收集挥发性有机化合物（VOC）和半胆固醇有机化合物（SVOCS）。模块化多币采样器的设计将以室内研究的结果为指导，这些室内研究的结果是，使用环境烟草烟作为测试气溶胶，测量有机气体的容量和颗粒渗透。如此小的（个人数据助理大小）的个人抽样器可以同时测量各种工作场所和家庭危害，例如臭氧，VOC，SVOC和颗粒物，以最大程度地减少采样人工制品的方式，高灵敏度。 此外，该设计可以缩放以进行室内和室外区域监视。