红枫湖鱼体中汞形态分布特征
Distribution of Mercury Species and Their Concentrations in Fish in Hongfeng Reservoir
查看参考文献16篇
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文摘
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基于冷原子荧光测定方法对红枫湖鱼体中总汞、甲基汞浓度进行了测定,并分析了不同种群,不同年龄段鱼体中汞及甲基汞的分布特征及控制因素.结果表明,不同鱼体中总汞含量在3.2~150 ng/g之间,平均为32 ng/g;甲基汞含量范围在0.15~53 ng/g之间,平均值为12 ng/g.这些值低于其他文献中所报道的鱼汞含量,也远低于国家食用标准限值,这可能和红枫湖多为人工饲养鱼,生长速度快,食物链短有关.汞含量在不同鱼种中的分布趋势由大到小为:肉食性鱼类,杂食性鱼类,草食性鱼类.这表明鱼体中汞含量主要和鱼的摄食习惯有关.此外,在所有的优势种群样品中,甲基汞含量和质量存在着显著相关性(r=0.71,p<0.001) |
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其他语种文摘
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Concentrations of total mercury and methyl mercury in fish of Hongfeng Reservoir were measured based on cold vapor atomic fluorescence detection to investigate their distributions in different fish stocks and age groups and the relevant controlling factors. The results showed that total mercury varied from 3.2 to 150 ng/g with an average of 32 ng/g and methyl mercury ranged from 0.15 to 53 ng/g, averaging 12 ng/g, being lower than those reported in previous literature and the permissible limit stipulated in the national standard, which resulted supposedly from the fast growth and the short food chain of the artificially raised fish in the lake. The distribution of mercury concentrations in different fish species appeared in the order of predatory fish > polyphagous fish> herbivorous fish, which indicated that mercury level in fish was mainly related to their feeding habits. Total mercury concentration was significantly correlated with body weight of the predominant fish stocks, the correlation coefficient being 0.59 (p<0.001) |
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来源
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西南大学学报. 自然科学版
,2010,32(7):78-82 【扩展库】
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关键词
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总汞
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甲基汞
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鱼
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红枫湖
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地址
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1.
贵州大学, 喀斯特环境与地质灾害防治教育部重点实验室, 贵阳, 550003
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贵州大学资源与环境工程学院, 贵阳, 550003
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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, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1673-9868 |
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学科
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环境污染及其防治 |
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基金
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贵州大学人才引进项目
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贵州大学研究生创新基金
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文献收藏号
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CSCD:3986834
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16
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