Polychlorinated biphenyls in Arctic air. 1. Temporal and spatial trends: 1992-1924
Article Abstract:
A three-year study that commenced in 1992 examined the airborne concentration of persistent organic pollutants, particularly polychlorinated biphenyls (PCBs), in the Canadian and Russian Arctic. The two sites in Canada, Alert on Ellesmere Island and Tagish in the western Yukon, and the one in Russia at Dunai Island in eastern Sibera, yielded mean PCB concentration of 27.4, 17.0 and 34.0 pg/m3 in 1993, respectively. The sites' proximity to source areas of PCB and the influence of air mass movement from the source regions are the main factors for the spatial and temporal variations in PCB concentrations at the Arctic sites.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Exposure to polychlorinated biphenyls in residential indoor air and outdoor air near a Superfund site
Article Abstract:
The indoor air concentrations of polychlorinated biphenyls (PCBs) at 7.9-61 ng/m3 in homes near the dredging site of highly contaminated harbor sediments at New Bedford Harbor in Massachussets was found to be higher than PCB concentrations of 5.2-51 ng/m3 in homes distant from the area. The indoor PCB concentrations in all 34 homes studied was found to be higher than the corresponding outdoor PCB concentrations. Indoor PCB concentrations, particularly of homes near highly contaminated sites, are important to determine the risks that PCBs pose to human health.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Determination of PCB sources by a principal component method with nonnegative constraints
Article Abstract:
A principal component analysis model (PCA) with nonnegative constraints can be a useful tool in the identification of sources of organic contaminants, particularly polychlorinated biphenyls (PCBs). The model, which is mainly used to identify sources of air pollution, was able to reconstruct known PCB sources in three sampling sites at the Milwaukee Harbor Estuary. The original data on the estuary's PCB sources were mixed with artificial data created through a new Monte Carlo technique to test the applicability of the method.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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