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首页> 外文期刊>Environmental Science & Technology >Facilitated Bioaccumulation of Cadmium and Copper in the Oyster Crassostrea hongkongensis Solely Exposed to Zinc
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Facilitated Bioaccumulation of Cadmium and Copper in the Oyster Crassostrea hongkongensis Solely Exposed to Zinc

机译：单一暴露于锌的牡蛎牡蛎中镉和铜的生物富集

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摘要

Exposure to one metal might have significant effects on the bioaccumulation of other metals. In the present study, we examined the possible effects of Zn exposure on the bioaccumulation of Cd and Cu in three populations of the oyster Crassostrea hongkongensis. We found that Zn exposure significantly enhanced the tissue concentrations of Cd and Cu in all populations, and the tissue concentrations of Cd and Cu were highly and positively related to the tissue Zn concentration. Furthermore, the enhanced bioaccumulation of Cd and Cu resulted mainly from their increasing accumulation and distribution in two subcellular fractions (i.e., metallothionein-like proteins and metal-rich granules). Tissue concentrations of Cd and Cu in the natural Zn-contaminated oysters also covaried with tissue Zn concentration, and prediction analyses revealed that Zn exposure was a significant contributor to tissue Cd and Cu concentrations. Therefore, we concluded that the increased Zn bioavailability in ambient waters not only increased the tissue Zn concentration but also enhanced the overall bioaccumulation of Cd and Cu. This study strongly demonstrates that contamination of metals in oysters may result from concurrent exposure to other metals. Thus, environmental managers should consider the possible exposure to other metals such as Zn in order to interpret/predict the tissue concentrations of toxic metals in oysters.
机译：暴露于一种金属可能会对其他金属的生物积累产生重大影响。在本研究中，我们研究了锌暴露对香港牡蛎（Crassostrea hongkongensis）三个种群中镉和铜生物积累的可能影响。我们发现锌暴露显着提高所有人群中Cd和Cu的组织浓度，并且Cd和Cu的组织浓度与组织Zn浓度高度正相关。此外，镉和铜的生物积累增强主要是由于它们在两个亚细胞级分（即类金属硫蛋白蛋白和富含金属的颗粒）中积累和分布的增加。天然受锌污染的牡蛎中Cd和Cu的组织浓度也与组织中Zn的含量有关，并且预测分析表明，Zn暴露是组织Cd和Cu的重要组成部分。因此，我们得出的结论是，环境水中锌的生物利用度的增加不仅增加了组织中锌的浓度，而且还增强了Cd和Cu的整体生物积累。这项研究有力地证明，牡蛎中金属的污染可能是由于同时接触其他金属而造成的。因此，环境管理人员应考虑可能与其他金属（例如Zn）接触，以解释/预测牡蛎中有毒金属的组织浓度。

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  • 来源
    《Environmental Science & Technology》 |2013年第3期|1670-1677|共8页
  • 作者

    Fengjie Liu; Wen-Xiong Wang;

  • 作者单位

    State Key Laboratory of Marine Pollution, Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong;

    State Key Laboratory of Marine Pollution, Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong;

  • 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
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