Polyaromatic hydrocarbon emissions in fly ashes from an atmospheric fluidized bed combustor using thermal extraction coupled with GC/TOF-MS
Polyaromatic hydrocarbon emissions in fly ashes from an atmospheric fluidized bed combustor using thermal extraction coupled with GC/TOF-MS
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DOI：
10.1021/ef010058e
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发表时间：
2002-02
期刊：
影响因子：
5.3
通讯作者：
Kunlei Liu;R. Heltsley;Daozhong Zou;and Wei-Ping Pan;J. T. Riley
中科院分区：
文献类型：
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作者：
Kunlei Liu;R. Heltsley;Daozhong Zou;and Wei-Ping Pan;J. T. Riley
在城市污染中已发现超过120种多环芳烃(PAHs)，其中16种已被美国环境保护局(EPA)指定为优先污染物。人为来源的城市浓度增加特别令人关切，因为其中许多具有致癌和/或致突变特性。采用热萃取与GC/TOF-MS联用和溶剂萃取与GC/MS联用的方法测定了0.1MWth沸腾炉飞灰样品中多环芳烃的含量。除了对常规溶剂萃取法和热萃取法的分析方法进行评价外，还对操作条件对飞灰样品中多环芳烃排放的影响进行了全面的研究。实验结果表明，在固相(飞灰)中发现的多环芳烃(两个和三个稠环体系)大多来自燃烧和/或燃烧过程中的击穿反应。
Over 120 polyaromatic hydrocarbons (PAHs) have been identified in urban pollution, of which 16 have been specified by the United States Environmental Protection Agency (EPA) as priority pollutants. Increased urban concentrations from anthropogenic sources are of particular concern because many of them show carcinogenic and/or mutagenic properties. In this study thermal extraction (TE) coupled with GC/TOF-MS and solvent extraction coupled with GC/MS were utilized to determine the PAH concentrations in fly ash samples collected from a bench-scale 0.1 MWth fluidized bed combustor (FBC). In addition to the evaluation of the analysis procedures including conventional solvent extraction and thermal extraction, a comprehensive study of the effect of operating conditions on PAH emissions in fly ashes samples was conducted. The experimental results indicate the majority of PAHs (two and three fused-ring systems) found in the solid phase (fly ash) are derived from breakdown reactions during the combustion and/or py...