单独与混合暴露条件下褶纹冠蚌对Cu、Zn的积累与分布Accumulation and Distribution of Copper and Zinc in the Freshwater Mussel,Cristaria Plicata,Exposed to Individual and Mixed Metals
夏天翔;刘雪华;赵孟彬;
摘要(Abstract)：
采用室内模拟方法,在单独与混合暴露条件下研究了褶纹冠蚌(Cristaria plicata)对Cu、Zn的积累与分布特征.结果表明:褶纹冠蚌对水环境中的Cu、Zn具有良好的积累能力,持续暴露8d内,体内各组织重金属积累量基本呈线性上升,其中鳃与外套积累速率最快(p<0.05).Cu在褶纹冠蚌鳃、内脏团和生殖腺中的积累速率与Zn之间存在显著差异(p<0.05),且Cu、Zn之间在各组织中的积累拮抗作用明显.暴露前,Cu含量在褶纹冠蚌体内依次为:生殖腺>外套、内脏团>鳃、足>肌肉(p<0.05),变化幅度为10倍左右;Zn含量依次为:鳃>内脏团>生殖腺>足、外套>肌肉(p<0.05),变化幅度为4倍左右.暴露后,外套和鳃对Cu、Zn的积累量最高,且Cu、Zn含量在不同组织间的变化幅度明显增加.暴露前后,Cu含量在不同组织间的变化幅度均高于Zn.不同暴露条件下,褶纹冠蚌不同组织对Zn的浓缩系数(BCF)明显高于Cu.
关键词(KeyWords)： 褶纹冠蚌;积累速率;组织;铜;锌;浓缩系数
基金项目(Foundation): 中国博士后科学基金(No.20080430453);; 北京市海淀区科委资助项目(No.K2008199)
作者(Author): 夏天翔;刘雪华;赵孟彬;
Email:
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