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Causes for Uranium Immobilization in a Portuguese Stream

机译：葡萄牙流中铀固定化的原因

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摘要

The strategies developed by plants to tolerate heavy metals dictate their survival capability in contaminated places sometimes allowing them to accumulate significant amounts of those elements. The accumulation ability makes them capable of retaining large amounts of metals thus avoiding the dispersion of these metals and so they become natural cleaners of the environment. However this environmental control is not only due to the vegetation but also to other non-biotic agents such as chemical exchanges with waters, soils and sediments. This work intends to identify what are the principal elements in the ecosystem that are responsible for the immobilisation of uranium coming from the old mine works of Urgeirica (Portugal) and which are dripping into the stream of Pantanha (near Nelas, Viseu, Centre-North of Portugal). It has been verified that the species Apium nodiflorum, Callitriche stagnalis, and Amblystegium sp accumulate large amounts of uranium, as well as the dead leafs and the finer sediments. The concentration of uranium decays from the discharge source and the uranium concentration in the water drops 30 times with no human intervention.
机译：植物开发的耐受重金属的策略决定了它们在受污染地方的生存能力，有时使它们能够积累大量的这些元素。累积能力使它们能够保留大量金属，从而避免了这些金属的分散，因此它们成为环境的天然清洁剂。但是，这种环境控制不仅取决于植被，还取决于其他非生物因子，例如与水，土壤和沉积物的化学交换。这项工作旨在确定生态系统中哪些主要成分，这些成分负责固定来自Urgeirica（葡萄牙）的旧矿山的铀的固定化，并滴入Pantanha溪流中（Nelas，Viseu附近，Centre-North附近）葡萄牙）。业已证实，夜蛾Apiium nodiflorum，Callitriche stagnalis和Amblystegium sp会积聚大量的铀，以及死叶和较细的沉积物。铀的浓度会从排放源中衰减出来，水中的铀浓度会下降30倍，而无需人工干预。

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  • 来源
    《Advances in waste management》|2010年|p.118-123|共6页
  • 会议地点 Kantaoui(TN);Kantaoui(TN)
  • 作者

    JOAO PRATAS; NELSON RODRIGUES; LYS TAVARES; ANDRE BRANCHES;

  • 作者单位

    Earth Sciences Department Faculty of Sciences and Technology University of Coimbra Largo Marquês de Pombal 3000-272 Coimbra PORTUGAL Geosciences Centre University of Coimbra Largo Marquês de Pombal 3000-272 COIMBRA, Portugal;

    Earth Sciences Department Faculty of Sciences and Technology University of Coimbra Largo Marquês de Pombal 3000-272 Coimbra PORTUGAL Geosciences Centre University of Coimbra Largo Marquês de Pombal 3000-272 COIMBRA, Portugal;

    Earth Sciences Department Faculty of Sciences and Technology University of Coimbra Largo Marquês de Pombal 3000-272 Coimbra PORTUGAL;

    Earth Sciences Department Faculty of Sciences and Technology University of Coimbra Largo Marquês de Pombal 3000-272 Coimbra PORTUGAL;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;
  • 关键词

    Uranium; contamination; ecosystem; Urgeirica (Portugal); macrophytes; mine wastes;

    机译：铀;污染;生态系统;乌尔吉里卡（葡萄牙）;大型植物;矿山废物;

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