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OALib Journal期刊
ISSN: 2333-9721
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腐殖酸（ha）作用下纳米氧化锌对鲫鱼的毒性效应
DOI: 10.3724/SP.J.1145.2011.00829, PP. 829-832
Keywords: 纳米zno,腐殖酸（ha）,氧化损伤,生态毒性,鲫鱼
Abstract:
通过静态模拟实验，研究不同浓度（0、1、1.5、2.5mgl-1）腐殖酸（humicacid，ha）对纳米zno（5mgl？1）毒性效应的影响.将鲫鱼暴露于ha与纳米zno混合体系中7d后，分析zn在鲫鱼体内的富集分布，及对鲫鱼脑部和肝脏自由基含量、抗氧化系统等的影响.结果显示：随ha浓度的增加，鲫鱼鳃部和肌肉中zn的含量增高，眼、脑和肝部zn含量则随之下降.纳米zno诱导鲫鱼肝脏和脑产生羟基自由基，ha浓度增大诱导鲫鱼肝脏和脑中sod活性升高，mda、gsh含量增加.纳米zno胁迫导致鲫鱼肝脏和脑氧化损伤，ha的浓度增加会促进纳米zno对鲫鱼肝脏和脑部的氧化损伤.研究表明ha改变了纳米zno在环境中的生物效应，因此在关注纳米材料的水生态安全时，不能忽视环境因子的影响.图2表1参28
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