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• 基金项目：

• 刘发义
• 中国科学院海洋研究所

• 王仁美
• 中国科学院海洋研究所

• 李世效
• 中国科学院海洋研究所

• 摘要：本文研究了紫贻贝(Mytilus edulis)对无机汞²⁰³HgCl₂的累积和结合.实验结果表明:紫贻贝累积汞速度很快,能力很强.用Sephadex G75凝胶层析表明:所有的²⁰³Hg几乎都以生物大分子存在(M.W.>1000).其中大部分²⁰³Hg的分子量大于50000,小部分分子量在1000-50000之间.本文还讨论了汞的累积机制,并研究了Zn²⁺对于²⁰³Hg累积的影响.

• Abstract：Bio-accumulation in and binding of inorganic mercury by mussel, My-tilus cdulis, were studied during 35-day exposure to ²⁰³HgCl. Results of the experiment showed that both speed and ability to accmulate mercury by Mytilus edulis is rather rapid and strong. Gel chromatography of cytosol fractions with sephadex G-76 indicated almost all of ²⁰³Hg was bound to large molecular substances (MW>1,000). Most of these ²⁰³Hg was bound to molecules molecular weight of which is greater than 50,000 and a small part to molecules molecular weight of which lies between 1,000 and 50,000. Mechanism of bio-accumulation was discussed. Effect of Zn²⁺ to bio-accumulation and binding of ²⁰³Hg were also studied.

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