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题名: 气态二甲基汞的发生系统与产生速率
作者: 孙婷; 王章玮; 陈剑; 张晓山
刊名: 环境化学
出版日期: 2016
卷号: 35, 期号:9, 页码:1792-1798
关键词: 二甲基汞 ; 产生速率 ; 高效 ; 发生系统
其他题名: Efficient and stable gaseous dimethymercury generation system and generation rate
中文摘要: 二甲基汞(DMeHg)是毒性最强的汞化合物之一,因其具有很强的生物累积性和生物放大效应,对人体健康构成了严重的威胁。由于DMeHg易光解、挥发性强且微量即可致死,因此很难获得DMeHg的高纯标准样品且对实验者健康风险极大。本实验旨在建立一种可持续产生低浓度、发生效率高、可控性好操作简单且成本低的气态二甲基汞发生系统。结果表明,甲基钴胺素(MeCo)∶标准汞溶液(Hg~(2+))的质量比为10∶ 1,盐度(00. 01 mol·L~(-1)),pH= 4的条件下,通过改变标准汞溶液的浓度及反应温度: 9℃条件下,0. 025 mg·L~(-1)、 0. 015 mg·L~(-1)的Hg~(2+)溶液产生DMeHg的速率在40140 h期间分别维持在300 pg·min~(-1)和150 pg·min~(-1);在18 ℃条件下,0. 025 mg·L~(-1)、0. 015 mg·L~(-1)的Hg~(2+)溶液产生DMeHg的速率在50130 h期间分别维持在500 pg·min~(-1)和300 pg·min~(-1)。该系统为进一步研究二甲基汞的环境过程及其效应提供了可靠的技术支撑。
部门归属: 大气环境科学实验室
英文摘要: Dimethylmercury(DMeHg) is one of the most toxic mercury compounds,and it has a serious threat to human health due to its ability of bioaccumulation and biomagnification. Since DMeHg could be decomposed easily under sunlight,and is volatile and fatal,it is difficult to acquire the high purity standard sample of DMeHg,furthermore,it is harmful to researchers. The aim is to design a DMeHg generating system of low concentration and high efficiency,which could not only produce gaseous DMeHg in low concentration and high controllability, but also has the characteristics of low cost and simple operation. In this study,when the mass concentration ratio of methylcobalamin(MeCo) and standard mercury solution(Hg~(2+)) = 10 ∶ 1,salinity(00. 01 mol· L~(-1)) ,pH = 4. 0,DMeHg generation rates of 0. 025 mg·L~(-1) and 0. 015 mg·L~(-1) mercury concentrations during 40140 h were maintaining about 300 pg·min~(-1) and 150 pg·min~(-1) at the temperature of 9℃,and the rates of 0. 025 mg·L~(-1) and 0. 015 mg·L~(-1) mercury concentrations during 50130 h were maintaining about 500 pg·min~(-1) and 300 pg·min~(-1) at the temperature of 18℃. Therefore,this DMeHg generation system is benefit to further research the environmental process and effects of mercury.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36610
Appears in Collections:大气环境科学实验室_期刊论文

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Recommended Citation:
孙婷,王章玮,陈剑,等. 气态二甲基汞的发生系统与产生速率[J]. 环境化学,2016,35(9):1792-1798.
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