摘要
甲基汞是影响水生生物的毒性物质,其在淡水环境中的安全阈值研究非常少。查阅国内外数据库,搜集筛选了中国淡水水生生物藻类、溞类、鱼类的12种生物甲基汞急性毒性数据、5种生物慢性数据,采用加拿大开发的评估因子法推算淡水水生生物的甲基汞的安全阈值。结合甲基汞典型易生物富集的特点,搜集甲基汞生物富集因子数据,引入最终残留值综合比较,得出甲基汞水生生态系统安全阈值为1.22 ng/L。基于此数据,利用生态风险评估商值法对目前报道的主要流域地表水溶解态甲基汞检出值做出风险评估,结果表明,大部分水域不存在甲基汞带来的风险,只有贵州的乌江渡水库和阿哈水库存在甲基汞带来的食用鱼风险。
Methyl mercury is toxic to freshwater organisms and the study on its safe threshold value is rare. Referring to the database of USA and China,ecotoxicological data of methyl mercury to Chinese resident freshwater organisms was collected and screened for the acute toxicity and chronic toxicity of methyl mercury on 12 aquatic life and 5 aquatic life in fresh waters respectively. Safe threshold value of 1.22 ng/L for methyl mercury in aquatic environment was acquired by employing the method of the assessment factor developed by Canada and final residue value, another parameter closely related to the biocondensation factor of methyl mercury. The risk assessment of dissolved methyl mercury in Chinese aquatic environment by the quotient method showed that most of the rivers,lakes or reservoirs did not pose any risk of consuming fish except Wujiangdu Reservoir and Aha Reservoir in Guizhou Province under this criterion.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第1期177-182,共6页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项(2012ZX07501-003-06)
环保公益性行业科研专项(201409038)
关键词
甲基汞
生态风险分析
评估因子
生物富集
methyl mercury
risk assessment
assessment factor
biocondensation
