Graney & Eriksen(2004)による〔『Metals in pond sediments as archives of anthropogenic activities: a study in response to health concerns』(1177p)から〕

『人間活動の記録としての溜池堆積物中の金属:健康の心配に対応した研究』


Abstract
 An environmental geochemistry approach was applied in response to health concerns about present day and past exposure to pollutants within Broome County, New York by determining historical records of anthropogenic activities as preserved in sediment cores. Sediment was collected from a stormwater retention pond adjacent to a warehouse complex in the urban community of Hillcrest as well as from 3 other ponds in rural locations in Broome County. Metal concentrations and decay products of 210Pb and 137Cs were measured to determine the timing of source specific differences in the distribution of metals in the sediment cores. Concentrations of Zn, Pb, Ni, C, Cr, Cd and As were elevated in the retention pond sediments when compared to sediment from other locations. Topography influenced atmospheric transport and deposition of pollutants within incised river valleys and enhanced runoff from impervious surfaces within an urban watershed contributed to the elevated metal concentrations at Hillcrest. Temporal changes in Pb deposition within retention pond sediment mimic the rise and fall in se of leaded gasoline. Arsenic concentrations decreased following placement of emission controls on nearby coal-fired power plant sources. Superimposed over the temporal trends of Pb and As are co-varying Zn, Ni, Cu, Cr and Cd concentrations; a suite of metals commonly used in metal plating processes by local industries. Analysis of sediment in stormwater retention ponds in other urban areas may provide opportunities for detailed records of pollution history to be obtained in many communities. Residents in urban communities located in incised river valley locations similar to Hillcrest may be particularly prone to enhanced exposure to metals from anthropogenic sources.』

1. Introduction
2. Methods
 2.1. Characteristics of ponds sampled and coring locations
 2.2. Core collection, processing and analysis
3. Results and discussion
 3.1. Metals sources and regulatory concerns
 3.2. Metal concentration and sources in Depot sediment cores
 3.3. Metal concentrations and sources in Depot pond sediment compared with other locations
 3.4. Results from acid extractable versus total metal concentrations
 3.5. Historical record of pollutant sources in Hillcrest derived from sediment core DEPOT3
4. Conclusions
Acknowledgements
References


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