HEAVY METAL EXPOSURE--ELEMENTAL AND ISOTOPIC COMPOSITION OF SAMPLES

描述（摘自应用程序） 大量的有毒金属仍然分散在环境中， 它们的分布和命运是不完全的特点，特别是近 大的城市中心，排放量和人口密度都是 集中此外，大量的金属继续被添加 对环境，特别是对自然沃茨的污染， 沉积物中，在汞等情况下，可以积累的鱼类，从而达到 人类的饮食该项目的一个中心目标是更好地描述 Pb、Hg等重金属向纽约的电流来源和迁移机制 大都市区和哈德逊河流域。我们将继续努力， 与正在进行的氯化碳氢化合物研究密切合作。我们 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，通过分析 环境样品（来自过滤器、沉积物的气载颗粒物 核心深度剖面和已知年龄的垃圾填埋灰沉积物）， 城市和非城市废物的发展和利用历史 在纽约市的焚化炉，并比较我们的沉积物衍生污染物 纽约州DEC数据库中关于几个地区鱼类污染物水平的历史 位于哈德逊河流域。我们将扩大对城市湖泊和公园的利用 土壤来表征城市的时间历史和地理范围 大气中金属的沉积速率。生成的数据应该可以让我们 调查人类接触金属和氯化物可能性 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， 为州和联邦正在进行的超级基金现场调查做出贡献 大都会地区和哈德逊河流域。

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.