History of Inuit community exposure to lead, cadmium, and mercury in sewage lake sediments.
作者： Mark H. Hermanson , James R. Brozowski
DOI: 10.1289/EHP.7985
关键词:
摘要: Exposure to lead, cadmium, and mercury is known be high in many arctic Inuit communities. These metals are emitted from industrial urban sources, distributed by long-range atmospheric transport remote regions, found country foods. Current community exposure these can measured food, but feces urine also excellent indicators of total ingestion inhalation because a percentage each metal excreted. Bulk domestic sewage or its residue waste treatment system good substitute measure. Domestic systems that accumulate sediment provide an accurate historical record changes inhalation. We collected cores lake used for facultative identify the history Pb, Cd, Hg. Cores were dated fluxes metal. A nearby was sampled measure combined background inputs, which subtracted data. Hg inputs grew rapidly after onset disposal late 1960s exceeded rate population growth contributing 1970 1990. The daily per-person Pb input 1990 (720,000 ng/person per day) tolerable intake level. Cd (48,000 (19,000 below respective TDI levels at time.
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