HEAVY METAL EXPOSURE--ELEMENTAL AND ISOTOPIC COMPOSITION OF SAMPLES

描述(取自应用程序) 大量有毒金属仍然分散在环境中， 它们的分布和命运并不完全清楚，特别是在 排放量和人口密度都在 集中精力。此外，大量的金属继续被添加。 对环境，特别是对自然水域，在那里它们积累 沉淀物，在汞等情况下，可以被鱼积累，从而达到 人类饮食。这个项目的中心目标将是更好地描述 铅、汞等金属向纽约的电流源和迁移机制 大都市区和哈德逊河流域。我们将继续在非常 与正在进行的氯代烃研究密切合作。我们的 方法将是重建和延长污染物的时间趋势 水平，包括铅同位素组成，通过对年代的分析 环境样品(过滤器、沉积物中的空气颗粒物 岩心深度剖面和已知年龄的垃圾填埋场火山灰沉积)，以组装 城市和非城市垃圾的开发和利用历史 纽约市的焚烧炉，并比较我们的沉积物衍生污染物 纽约DEC关于几个部分鱼中污染物水平的数据库的历史 哈德逊河流域。扩大城市湖泊和公园利用。 表征城市时间历史和地理范围的土壤 金属在大气中的沉积率。生成的数据应该允许我们 调查人类接触金属和氯化物质的可能性 来自城市公园和社区花园的碳氢化合物，以调查人类 通过食用鱼类接触氯化有机物和汞的途径，以及 协助正在进行的州和联邦政府对超级基金网站的调查 在大都市区和哈德逊河流域内。

DESCRIPTION (Taken from application) Large quantities of toxic metals remain dispersed in the environment where their distribution and fate are imperfectly characterized, especially near large urban centers where both emissions and population density are concentrated. Moreover, significant quantities of metals continue to be added to the environment, particularly to natural waters where they accumulate in sediments and, in cases such as Hg, can be accumulated by fish and thus reach human diets. A central aim of this project will be to better characterize current sources and transport mechanisms of Pb, Hg and other metals to the NY metropolitan area and Hudson River basin. We will continue to work in very close collaboration with ongoing research on chlorinated hydrocarbons. Our approach will be to reconstruct and extend temporal trends in contaminant levels, including Pb isotope compositions, through analysis of dated environmental samples (airborne particulate matter from filters, sediments core depth profiles and landfill ash deposits of known age) to assemble the history of development and use of municipal and non-municipal waste incinerators in New York City, and to compare our sediment-derived contaminant history to NYS DEC's database on contaminant levels in fish from several parts of the Hudson River basin. We will expand our use of urban lakes and park soils to characterize the temporal history and geographical extent of urban atmospheric deposition rates of metals. Data generated should allow us to investigate potential for human exposure to metals and chlorinated hydrocarbons from city parks and community gardens, to investigate human exposure pathways of chlorinated organics and Hg via fish consumption, and contribute to ongoing state and federal investigations of Superfund sites within the metropolitan area and Hudson River Basin.