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首页> 外文期刊>Environmental toxicology and chemistry >MERCURY EXPOSED: ADVANCES IN ENVIRONMENTAL ANALYSIS AND ECOTOXICOLOGY OF A HIGHLY TOXIC METAL
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MERCURY EXPOSED: ADVANCES IN ENVIRONMENTAL ANALYSIS AND ECOTOXICOLOGY OF A HIGHLY TOXIC METAL

机译:暴露的汞:高毒金属的环境分析和生态毒理学研究进展

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摘要

Concerns about environmental mercury pollution stem largely from the adverse effects of biotic exposure to methylmercury, a highly toxic compound that readily crosses biological membranes, accumulates in exposed organisms, and biomagnifies in food webs. Most of the mercury in anthropogenic and natural emissions, air, wet and dry atmospheric deposition, soils, and oxic surface water exists as inorganic forms. Methylmercury is produced in the environment by methylating bacteria , and the microbial methylation of inorganic mercury is a key process affecting the amount of methylmercury bioaccumulated and biomagnified in food webs . Thus, methylmercury concentrations are greatest in aquatic, wetland, and terrestrial environments that have conditions conducive to microbial methylation of inorganic mercury. The primary pathway of human exposure to methylmercury is consumption of estuarine, marine, and freshwater fish , and processes that affect the mass of methylmercury in aquatic ecosystems or its concentration at the base of aquatic food webs strongly affect its concentration in all trophic levels, including fish.
机译:对环境汞污染的担忧主要源于生物暴露于甲基汞的不利影响,甲基汞是一种剧毒化合物,易于穿过生物膜,在暴露的生物体中积累,并在食物网中生物放大。人为和自然排放物中的大多数汞,空气,潮湿和干燥的大气沉积物,土壤和有氧地表水中的汞均以无机形式存在。环境中的甲基汞是由细菌甲基化而产生的,无机汞的​​微生物甲基化是影响食物网中生物积累和生物放大的甲基汞数量的关键过程。因此,甲基汞浓度在具有有利于无机汞微生物甲基化的条件的水生,湿地和陆地环境中最大。人类接触甲基汞的主要途径是河口,海洋和淡水鱼的消费,影响水生生态系统中甲基汞的质量或在水生食物网底部甲基汞浓度的过程强烈影响其在所有营养级的浓度,包括鱼。

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2013年第10期|2175-2178|共4页
  • 作者

    James G. Wiener;

  • 作者单位

    River Studies Center, University of Wisconsin-La Crosse, La Crosse, Wisconsin, USA;

  • 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
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