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Distribution and availability of mercury and methylmercury in different waters from the Rio Madeira Basin, Amazon

机译：亚马逊里约马德拉群岛盆地不同水域中汞和甲基汞的分布和可用性

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摘要

Waters from the Amazon Basin have distinct physicochemical characteristics that can be optically classified as "black", "clear" and "white". We studied the distribution of total-Hg (THg) and methyl-Hg (MeHg) in these waters and respective suspended solids, sediment, phytoplankton, zooplankton, and benthic macroinvertebrates (BM) in the Madeira River Basin. Compared with the other types of water, the more acidic "black" kind had the highest THg and MeHg concentrations. The trend (black clear white) occurred for the concentrations of THg and MeHg in sediments and in the biotic compartment (plankton, macroinvertebrates). Organic Hg accounted for a small percentage (0.6-0.4%) of the THg in sediments but was highest in water (17-15%). For plankton and BM, the biota sediment accumulation factor (BSAFs) of MeHg (53-125) were greater than those of THg (4.5-15); however, the BSAF trend according to water type (black clear white) was only significant for MeHg. Sediment THg is correlated with all forms of Hg in biotic and abiotic matrices. The results indicate that water acidity in the Amazon is an important chemical characteristic in assessing Hg contamination of sediments and bioaccumulation in the aquatic food web. The differences in the BSAFs between THg and MeHg support the use of this factor for evaluating the bioaccumulation potential of sediment-bound Hg. The results add information critical to assessing environmental and health risks related to Hg methylation and potential fish-MeHg contamination, especially in tropical aquatic environments. (C) 2018 Elsevier Ltd. All rights reserved.
机译：来自亚马逊河流域的水具有独特的理化特性，可以将其光学分类为“黑色”，“透明”和“白色”。我们研究了这些水域中总汞（THg）和甲基汞（MeHg）以及马德拉河盆地中各个悬浮固体，沉积物，浮游植物，浮游动物和底栖大型无脊椎动物（BM）的分布。与其他类型的水相比，酸性更高的“黑色”种类具有最高的THg和MeHg浓度。沉积物和生物区室（浮游生物，大型无脊椎动物）中THg和MeHg的浓度出现了趋势（黑色>透明>白色）。有机汞在沉积物中的THg所占比例很小（0.6-0.4％），而在水中则最高（17-15％）。对于浮游生物和BM，MeHg（53-125）的生物沉积物积累因子（BSAFs）大于THg（4.5-15）；但是，根据水类型（黑色>透明>白色）的BSAF趋势仅对MeHg有意义。沉积物THg与生物和非生物基质中所有形式的Hg相关。结果表明，亚马逊河中的水酸度是评估沉积物中汞污染和水生食物网中生物富集的重要化学特征。 THg和MeHg之间的BSAFs差异支持使用该因子评估沉积物结合的Hg的生物蓄积潜力。这些结果增加了对于评估与汞甲基化和潜在的鱼类MeHg污染有关的环境和健康风险至关重要的信息，尤其是在热带水生环境中。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2018年第4期|771-779|共9页
  • 作者

    Vieira Miguel; Bernardi Jose V. E.; Dorea Jose G.; Rocha Bruno C. P.; Ribeiro Romulo; Zara Luis F.;

  • 作者单位

    Univ Brasilia, Lab Clencias Vida & Terra, Campus Planaltina, Brasilia, DF, Brazil;

    Univ Brasilia, Lab Clencias Vida & Terra, Campus Planaltina, Brasilia, DF, Brazil;

    Univ Brasilia, Lab Clencias Vida & Terra, Campus Planaltina, Brasilia, DF, Brazil;

    Univ Estadual Paulista, Dept Quim, Campus Araraquara, Sao Paulo, Brazil;

    Univ Brasilia, Lab Clencias Vida & Terra, Campus Planaltina, Brasilia, DF, Brazil;

    Univ Brasilia, Lab Clencias Vida & Terra, Campus Planaltina, Brasilia, DF, Brazil;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mercury; Methylmercury; Amazon; Sediments; Water color; PH; Plankton;

    机译：汞;甲基汞;亚马逊河;沉积物;水彩;PH;浮游生物;

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