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首页> 外文期刊>Environmental Science & Technology >Mercury Emission by the Baltic Sea: A Consequence of Cyanobacterial Activity, Photochemistry, And Low-Light Mercury Transformation
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Mercury Emission by the Baltic Sea: A Consequence of Cyanobacterial Activity, Photochemistry, And Low-Light Mercury Transformation

机译：波罗的海的汞排放：蓝藻活动，光化学和弱光汞转化的后果

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摘要

Marine mercury emission plays an important role in the atmospheric mercury budget. It is caused by the transformation of ionic mercury to volatile elemental mercury (Hg~0) and the subsequent release of the latter from surface waters. In this study, we investigated mercury transformation using three approaches: incubation experiments, statistical analyses of phytoplankton and Hg~0 data, and microbiological determinations. The incubation experiments revealed that (1) biotic-light-dependent transformation accounted for an average of 30% of the total natural transformation, (2) photochemistry also contributed 3096, such that its contribution was less important than previously considered, and (3) low-light production accounted for 4096. Field experiments and the microbiological investigations suggested the cyanobacterial genera Synechococcus and Aphanizomenon as the main transformers of mercury. On the basis of the rough balance of biotic mercury transformation with mercury emission during summer, on average, only a small portion of a few percent of the mixed layer participates in active transformation.
机译：海洋汞排放在大气汞预算中起着重要作用。它是由离子汞转变为挥发性元素汞（Hg〜0）以及随后从地表水中释放出来的原因。在这项研究中，我们使用三种方法研究了汞的转化：温育实验，浮游植物和Hg〜0数据的统计分析以及微生物学测定。孵化实验表明（1）生物依赖光的转化平均占总自然转化的30％；（2）光化学也贡献了3096，因此其贡献不如先前考虑的重要，（3）弱光产量占4096。现场试验和微生物学研究表明，蓝藻属Synechococcus和Aphanizomenon是汞的主要转化者。根据夏季生物汞转化与汞排放的粗略平衡，平均而言，只有少量混合层的一小部分参与了主动转化。

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  • 来源
    《Environmental Science & Technology》 |2015年第19期|11449-11457|共9页
  • 作者

    Joachim Kuss; Norbert Wasmund; Guenther Nausch; Matthias Labrenz;

  • 作者单位

    Department of Marine Chemistry, Leibniz Institute for Baltic Sea Research Warnemuende, Seestrasse 15, D-18119 Rostock, Germany;

    Department of Biological Oceanography, Leibniz Institute for Baltic Sea Research Warnemuende, Seestrasse 15, D-18119 Rostock, Germany;

    Department of Marine Chemistry, Leibniz Institute for Baltic Sea Research Warnemuende, Seestrasse 15, D-18119 Rostock, Germany;

    Department of Biological Oceanography, Leibniz Institute for Baltic Sea Research Warnemuende, Seestrasse 15, D-18119 Rostock, Germany;

  • 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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