典型排放源黑碳的稳定碳同位素组成研究
Stable Carbon Isotope of Black Carbon from Typical Emission Sources in China
查看参考文献35篇
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文摘
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采集了我国主要的黑碳排放源(生物质燃烧、民用燃煤和机动车尾气)的烟尘样品,分析烟尘中黑碳(BC)和总碳(TC)与原始燃料的稳定碳同位素组成(δ~(13)C),对比各种δ~(13)C值之间的关联性,评估运用δ~(13)C技术进行BC源解析的潜力。结果表明:①3种典型排放源烟尘样品的δ~(13)C_(BC)与燃料有较好的一致性,且不同排放源的δ~(13)C_(BC)变化范围之间有比较明显的差别:生物质燃料除玉米秸(C4植物,δ~(13)C_(BC)为-13.62‰)显著不同外,C_3植物的δ~(13)C_(BC)平均值为-26.49‰±1.17‰;烟煤的平均值为-23.46‰±0.37‰;机动车尾气(包括柴油车和汽油车)的平均值为-25.17‰±0.40‰.②各种排放源的BC形成过程存在程度各异的碳同位素分馏,C_4植物(玉米秸)燃烧过程分馏作用较明显(BC的δ~(13)C相对燃料负偏1.62‰),而C_3植物和民用煤燃烧过程的分馏较小(分别正偏0.63‰和0.52‰).③BC的纯化手段(CTO-375方法)对生物质烟尘的δ~(13)C有一定的影响(BC和TC的δ~(13)C相差约为0.50‰),对化石燃料烟尘没有影响.上述典型排放源的δ_(13)C数据库可为BC源解析提供依据. |
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其他语种文摘
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Smoke particles from the three typical BC emission sources(biomass burning,household coal combustion,and vehicular exhaust) were collected and analyzed for stable carbon isotopes(δ~(13) C)of black carbon(BC),total carbon(TC),as well as the original fuels.The results show that corn stalk(a typical C4 plant,-13.62‰) has the highest δ~(13) C_(BC) value,and the average values for C3 plants,bituminous coals,and vehicle exhaust are-26.49‰±1.17‰,-23.46‰±0.37‰,and-25.17‰±0.40‰,respectively.δ~(13) C_(BC) values from the three sources are similar to the corresponding fuels,and the ranges of these values are different from each other.Carbon fractionation occurs during the process of BC formation.δ~(13) CBC for C_4 plant(corn stalk)is lower than that of the fuel by 1.62‰,while the values for C_3 plants and coals are higher than that of the fuels by 0.63‰ and 0.52‰,respectively.CTO-375 method,which is used to extract BC from TC,affects the stable carbon isotope of smokes from biomass burning to some extent(the difference between δ~(13) CBC and δ~(13) CTC is nearly 0.50‰),but has little effect on fossil fuel smokes.This δ~(13) C database for typical emission sources provides scientific information on BC source apportionment. |
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来源
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环境科学
,2012,33(3):673-678 【核心库】
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关键词
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黑碳
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稳定碳同位素
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生物质燃烧
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民用燃煤
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机动车尾气
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地址
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中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程重点实验室;;有机地球化学国家重点实验室, 烟台, 264003
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中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程重点实验室, 烟台, 264003
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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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ISSN
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0250-3301 |
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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基金
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中国科学院知识创新工程重要方向项目
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国家自然科学基金项目
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文献收藏号
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CSCD:4451129
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