Atmospheric Mercury Concentrations in the Basin of the Amazon, Brazil
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概要
- 論文の詳細を見る
A wide regional mercury pollution in Amazon, Brazil is closely associated with goldmining that has been carried out in the basin of tributaries of the Amazon since the eighteenth century. Possible involvement has been discussed on atmospheric circulation in distributing the volatile pollutant. We developed a portable air sampler for the collection of mercury compounds and determined atmospheric mercury concentrations at several sites in Brazil including the basin of the Amazon tributaries. The mean concentration of total mercury was between 9.1 and 14.0 ng/m^3 in the basin of the Uatuma^^∿ River located in the tropical rain forest far from goldmining sites and from urbanized area. These mercury levels exceeded the background level previously reported in rural area and, furthermore, were higher than concentrations observed in Rio de Janeiro and in Manaus that were compatible with the reference values for urban area. Mercury concentrations were also determined in gold refineries in the basin of the Tapajos River, and detected at a significant but not a health deteriorating level. Although only preliminary data were available, the present observations were in favor of the hypothesis that mercury is distributed widely by long distant transport by the atmospheric circulation after released at gold mining sites.
- 日本衛生学会の論文
著者
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MOTOHASHI Yutaka
Department of Public Health, Akita University Faculty of Medicine
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ABE Yuko
Department of Chemistry and Material Technology, Kyoto Institute of Technology
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Abe Yuko
Department Of Public Health Akita University School Of Medicine
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Abe Yuko
Department Of Chemical Engineering Tokyo Institute Of Technology
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Motohashi Yutaka
Department Of Public Health Akita University Faculty Of Medicine
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Abe Touru
Department Of Public Health Akita University School Of Medicine
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Abe Touru
Department Of Public Health Akita University
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Hachiya Noriyuki
Department Of Neurosurgery Kyoto University Graduate School Of Medicine
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TAKIZAWA Yukio
National Institute for Minamata Disease
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HISAMATSU Shunichi
Department of Public Health, Akita University School of Medicine
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Hisamatsu S
Inst. Environmental Sci. Aomori Jpn
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Abe Yuko
Department Of Cellular Life Science Faculty Of Advanced Life Science Hokkaido University
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Motohashi Yutaka
Department Of Hygiene Faculty Of Medicine Tokyo Medical And Dental University
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Hachiya N
Social Science Section Department Of International Affairs And Environmental Sciences National Insti
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