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首页> 外文期刊>Environmental Science & Technology >Tracking the Fate of Mercury in the Fish and Bottom Sediments of Minamata Bay, Japan, Using Stable Mercury Isotopes
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Tracking the Fate of Mercury in the Fish and Bottom Sediments of Minamata Bay, Japan, Using Stable Mercury Isotopes

机译：使用稳定的汞同位素追踪日本水am湾鱼类和底部沉积物中的汞命运

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摘要

Between 1932 and 1968, industrial wastewater containing methylmer- cury (MeHg) and other mercury (Hg) compounds was discharged directly into Minamata Bay, Japan, seriously contaminating the fishery. Thousands of people who consumed tainted fish and shellfish developed a neurological disorder now known as Minamata disease. Concentrations of total mercury (THg) in recent fish and sediment samples from Minamata Bay remain higher than those in other Japanese coastal waters, and elevated concentrations of THg in sediments in the greater Yatsushiro Sea suggest that Hg has moved beyond the bay. We measured stable Hg isotope ratios in sediment cores from Minamata Bay and the southern Yatsushiro Sea and in archived fish from Minamata Bay dating from 1978 to 2013. Values of δ~(202)Hg and Δ~(199)Hg in Yatsushiro Sea surface sediments were indistinguishable from those in highly contaminated Minamata Bay sediments but distinct from and nonoverlapping with values in background (noncontaminated) sediments. We conclude that stable Hg isotope data can be used to track Minamata Bay Hg as it moves into the greater Yatsushiro Sea. In addition, our data suggest that MeHg is produced in bottom sediments and enters the food web without substantial prior photodegradation, possibly in sediment porewaters or near the sediment-water interface.
机译：从1932年到1968年，含有甲基汞（MeHg）和其他汞（Hg）化合物的工业废水直接排入日本水Min湾，严重污染了渔业。数以千计的食用受污染的鱼和贝类的人出现了一种神经病，即现在的水Min病。水Min湾最近的鱼类和沉积物样本中总汞（THg）的浓度仍高于日本其他沿海水域，并且八代海中沉积物中THg的浓度升高表明汞已移出海湾。我们测量了水to湾和八代海南部沉积物核心以及水Min湾从1978年至2013年的存档鱼中稳定的汞同位素比。八代海表层沉积物中的δ〜（202）Hg和Δ〜（199）Hg值与高度污染的水am湾沉积物中的那些没有区别，但与本底（未污染）沉积物中的值不同且不重叠。我们得出的结论是，稳定的Hg同位素数据可用于跟踪水am湾汞向大八代海的迁移。此外，我们的数据表明，甲基汞是在底部沉积物中产生的，并进入食物网而没有先验的光降解，可能在沉积物孔隙水中或在沉积物-水界面附近。

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  • 来源
    《Environmental Science & Technology》 |2015年第9期|5399-5406|共8页
  • 作者

    Steven J. Balogh; Martin Tsz-Ki Tsui; Joel D. Blum; Akito Matsuyama; Glenn E. Woerndle; Shinichiro Yano; Akihide Tada;

  • 作者单位

    Moyau Consulting Engineering and Science, St. Paul, Minnesota 55116, United States,Metropolitan Council Environmental Services, St. Paul, Minnesota 55106, United States;

    Department of Biology, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States;

    Department of Earth & Environmental Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States;

    National Institute for Minamata Disease, Minamata, Kumamoto 867-0008, Japan;

    Department of Biology, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States;

    Kyushu University, Faculty of Engineering, Fukuoka, Fukuoka 819-0395, Japan;

    Nagasaki University, Faculty of Engineering, Nagasaki, Nagasaki 852-8521, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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