基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估
Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy
查看参考文献57篇
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文摘
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化石燃料燃烧和生物质燃烧是污染物多环芳烃(polycyclic aromatic hydrocarbon,PAHs)的两大来源.放射性碳(~(14)C)分析近年用于评估这两类源对环境中PAHs的相对贡献.此方法基于化石燃料和生物质的~(14)C含量差异,即化石燃料不含~(14)C,而生物质的~(14)C浓度有一个较稳定值. ~(14)C的自然丰度极低(约10-12 ),因此检测PAHs这样的痕量污染物的~(14)C含量一度极具挑战. 1990年代中期,加速器质谱的技术突破使得对环境样品 PAHs的~(14)C分析具有实用价值.要准确测出PAHs的~(14)C含量,须先从化学成分复杂的环境样品中分离出高纯度的PAHs.制备气相色谱因其出色的分离能力而成为目前环境样品PAHs~(14)C分析必备的工具.本文意在简介基于~(14)C分析的PAHs源解析的基本原理、技术进展,以及评估该方法获得的PAHs源解析结果的准确性. |
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其他语种文摘
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Combustion of biomass and fossil fuel are two main sources of the pollutants polycyclic aromatic hydrocarbons (PAHs) . Radiocarbon (~(14)C) analysis recently has been applied to estimate relative contribution of the two sources. The method is based on the difference of ~(14)C content in fossil fuel and biomass. Namely,fossil fuel is radiocarbon free,but contemporary biomass has a relatively stable ~(14)C level. The extremely low natural abundance of ~(14)C (about 10-12 ) once made it challenging to measure ~(14)C content of trace pollutants like PAHs. ~(14)C analysis became practical since mid-1990s due to the development of micro-scale accelerator mass spectrometer (AMS ) . For accurate ~(14)C analysis,it is a prerequisite to harvest individual PAHs with high purity from the chemically complex environmental samples. Owing to its excellent separation efficiency,preparative capillary gas chromatography is currently an essential tool in PAHs ~(14)C analysis of environmental samples. Fundamental and technical progresses of ~(14)C-based PAHs source apportionment are introduced in this article,and accuracy of the method is also assessed. |
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来源
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环境化学
,2015,34(6):1025-1036 【核心库】
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DOI
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10.7524/j.issn.0254-6108.2015.06.2014111101
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关键词
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多环芳烃
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放射性碳分析
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源解析
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加速器质谱
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制备气相色谱
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地址
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中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 510640
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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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0254-6108 |
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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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中国博士后科学基金
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文献收藏号
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CSCD:5454672
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