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Environmental status of Daya Bay surface sediments inferred from a sequential extraction technique

机译:序贯提取技术推断大亚湾表层沉积物的环境状况

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摘要

The chemical partitioning of 12 trace metals (Ba, Cd, Co, Cu, Mn, Mo, Ni, Pb, Sc, Sr, U, Zn) in 9 surface sediments from Daya Bay, northern South China Sea, was studied by a four-step sequential extraction technique to assess their environmental/pollution status. The studied metals take on different fraction composition patterns, and some of them show significant spatial variation especially for Cd. A majority of the studied metals can be considered immobile because of their high percentages in the residual fraction. It seems that the Daya Bay surface sediments have not yet been polluted by the studied heavy metals which are used as parameters to classify marine sediment quality, i.e., Cd, Cu, Ni, Pb and Zn. For all metals except for Pb, the extent of anthropogenic influences on their total concentrations in the Daya Bay surface sediments is generally imperceptible. The metals' potential risks to the environment were assessed, and the results showed that they have generally no risk or low risk except for Cd, Mn and Sr.
机译:通过四个研究人员研究了南海大亚湾9种表层沉积物中12种微量金属(Ba,Cd,Co,Cu,Mn,Mo,Ni,Pb,Sc,Sr,U,Zn)的化学分配。逐步提取技术以评估其环境/污染状况。所研究的金属具有不同的馏分组成模式,其中一些表现出明显的空间变化,尤其是对于镉。大多数研究的金属由于在残留物中所占的百分比很高,因此被认为是不可移动的。似乎大亚湾表层沉积物尚未被研究的重金属污染,这些重金属被用作对海洋沉积物质量进行分类的参数,即镉,铜,镍,铅和锌。对于除铅以外的所有金属,人为影响对其在大亚湾表层沉积物中总浓度的影响程度通常是不明显的。评估了这些金属对环境的潜在风险,结果表明,除了Cd,Mn和Sr外,它们通常没有风险或低风险。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第3期|369-378|共10页
  • 作者单位

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;

    Institute of Marine Geology and Chemistry, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    trace metals; chemical speciation; sediment analysis; environmental assessment; Daya Bay; China;

    机译:痕量金属;化学形态沉积物分析环境评估;大亚湾中国;

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