Project 4: Atmosperic Sources of PCB Congeners

项目 4：PCB 同系物的大气来源

• 批准号: 8377289
• 负责人: LARRY W ROBERTSON
• 金额: $ 28.26万
• 依托单位: UNIVERSITY OF IOWA
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-05-12 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/8377289
• 关键词: Address; Air; Archives; Aroclor; Aroclors; Characteristics; Chemicals; Chicago; Chronology; Cities; Collection; Communities; Complex; Databases; Deposition; Effectiveness; Environment; Environmental Exposure; Excision; Exposure to; Future; Goals; Indiana; Individual; Laboratory Study; Measurement; Measures; Michigan; Modeling; Monitor; Nature; Neighborhoods; Paint; Polychlorinated Biphenyls; Recording of previous events; Relative (related person); Research; Research Project Grants; Role; Sampling; Seasons; Shipping; Ships; Source; Surface; Testing; Toxic effect; Weather; Work; exposed human population; field study; high risk; remediation; sound

The long-term goal of Project #4 is to better understand the relationship between the observed concentrations in ambient air and specific sources of airborne PCBs in residential and industrial communities. The central hypothesis is that emissions of airborne PCBs are a function of measureable and quantifiable characteristics of the physical-chemical characteristics of the compounds and exposed environmental surfaces on which the PCBs reside. The Aims focus on identification, characterization and prediction of the magnitude and impact of sources of airborne PCBs: Aim 1: To determine the sources and fate of airborne PCB congeners in the urban/industrial complex of Chicago. We hypothesize that airborne PCBs in Chicago originate from contaminated surfaces throughout the city. We will test our hypotheses by deploying air samplers throughout the City of Chicago and over seasons. Using the measurements, models, and geographic databases, we will determine the relative contribution of Chicago sources toward the annual mass of PCBs deposited in Lake Michigan, distinguish long range versus local sources of airborne PCBs to the region, and determine neighborhoods of elevated risk for high exposure to airborne PCBs. Aim 2: To chapacterize the sources and Aroclor PCBs. We hypothesize that non-Aroclor PCBs have beeN released to the environment for decades and conthnue to be released due to their presence in commercial paint and other buil$ing materials. We wihl test this hypothesis by measuring non-Aroclor PCBs in archival and new samples and by measuring PCBs in c/mmercial paint. Using sediment cores and archived sample extracts, we will ddtermine the chronology of environmental exposure to these compounds and the magnitude of their current emissions. Aim 3: To characterize the emission and fate of airborne PCBs in the Indiana Harbor and Ship Canal (IHSC). We hypothesize that the sediment of the IHSC is a major source of airborne PCB congeners to the community of East Chicago, Indiana. To test our hypotheses, we will measure PCBs in deep sediments of the IHSC. We will calculate the release of PCBs under no-dredging and dredging-conditions, including partial Removal that exposes deep sediments. We will monitor the effect of dredging through local and regional air measurements. As a result of the work described here, Project #4 will promote more scientifically-sound and effective action to reduce human exposure to these potentially harmful compounds.

项目4的长期目标是更好地了解环境空气中观测到的浓度与住宅和工业社区空气中多氯联苯具体来源之间的关系。核心假设是，空气中多氯联苯的排放量是化合物的物理化学特性和多氯联苯所在的暴露环境表面的可测量和可量化特性的函数。目标1：确定空气中多氯联苯同系物在芝加哥城市/工业区的来源和归宿。我们假设空气中的多氯联苯在芝加哥来自污染的表面在整个城市。我们将通过在整个芝加哥市和各个季节部署空气采样器来测试我们的假设。使用的测量，模型和地理数据库，我们将确定芝加哥源的相对贡献对每年的质量沉积在密歇根湖的多氯联苯，区分远程与本地源的空气中的多氯联苯的区域，并确定高风险的高暴露于空气中的多氯联苯的邻居。目的2：确定多氯联苯的来源和多氯联苯。我们假设，非多氯联苯已被释放到环境中几十年，并继续释放，由于其存在于商业涂料和其他建筑材料。我们将通过测量档案和新样品中的非Aroclor多氯联苯以及测量商用油漆中的多氯联苯来测试这一假设。利用沉积物岩心和存档的样品提取物，我们将确定环境暴露于这些化合物的时间顺序及其当前排放量的大小。目标3：描述印第安纳州港口和运河（IHSC）中空气中多氯联苯的排放和归宿。我们 假设IHSC的沉积物是印第安纳州东芝加哥社区空气中PCB同系物的主要来源。为了验证我们的假设，我们将测量IHSC深层沉积物中的多氯联苯。我们将计算在非疏浚和疏浚条件下多氯联苯的释放，包括暴露深层沉积物的部分去除。我们会透过测量本港及区内的空气质素，监察疏浚工程的效果。作为这里所描述的工作的结果，项目#4将促进更科学合理和有效的行动，以减少人类接触这些潜在有害的化合物。