乌江洪家渡水库鱼体汞含量

被引：15

作者：

姚珩 ^{[1
,2
]}

冯新斌 ^{[1
]}

闫海鱼 ^{[1
]}

仇广乐 ^{[1
]}

商立海 ^{[1
]}

侍文芳 ^{[1
,2
]}

机构：

[1] 中国科学院地球化学研究所环境地球化学国家重点实验室

[2] 中国科学院研究生院

来源：

生态学杂志 | 2010年 / 29卷 / 06期

关键词：

鱼; 总汞; 甲基汞; 洪家渡水库;

D O I：

10.13292/j.1000-4890.2010.0170

中图分类号：

X174 [环境动物学];

学科分类号：

摘要：

测定了贵州省乌江流域新建的洪家渡水库中的8种124尾鱼类的总汞和甲基汞含量,探讨其变化趋势及可能产生的生态风险。总汞采用混合酸消解用冷原子荧光(CVAFS)测定,甲基汞的测定采用碱消解-水相乙基化结合气相色谱(GC)冷原子荧光(CVAFS)测定。结果表明,总汞和甲基汞含量均为肉食性鱼类>杂食性鱼类,鱼体汞含量与它们的生态学特性(食物来源和生活习性)有关,与体重和体长无显著相关关系;鱼体总汞和甲基汞含量均值分别为0.063±0.046和0.028±0.019mg.kg-1,均远低于大部分研究报道的新建水库中鱼体汞含量(>0.50mg.kg-1)。洪家渡水库鱼类由于在低汞环境中,导致甲基汞不易富集,其鱼体甲基汞和总汞含量并未急剧增加,显著不同于北美和欧洲等地区新建水库中鱼体汞含量升高的现象,但随着水库演化导致水库有机质增加可能使鱼体汞逐步上升。

引用

页码：1155 / 1160

页数：6

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