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褐煤与烟煤燃烧排放可吸入颗粒物的特性
引用本文:赵承美,孙俊民,刘惠永.褐煤与烟煤燃烧排放可吸入颗粒物的特性[J].环境科学与技术,2010,33(12).
作者姓名:赵承美  孙俊民  刘惠永
基金项目:国家自然科学基金,信阳师范学院青年骨干教师资助计划
摘    要:分别对燃烧褐煤与烟煤两个电厂排放可吸入颗粒物的粒度分布、显微结构及重金属和多环芳烃在可吸入颗粒物中分布特征进行研究。研究表明:不同煤种燃烧排放可吸入颗粒物的形态都以球形颗粒为主,表面比较光滑,同原状飞灰相比,可吸入颗粒物以实心结构为主,多孔和空心结构较少;随着可吸入颗粒物粒径的减小,重金属和多环芳烃含量呈现逐渐增加的趋势;褐煤燃烧排放可吸入颗粒物中重金属总量要高于烟煤燃烧排放重金属总量,尤其是褐煤燃烧排放As含量明显高于烟煤燃烧排放As含量,原因是由于褐煤中As含量大于烟煤中As含量;褐煤燃烧排放可吸入颗粒物中多环芳烃总量要高于烟煤燃烧排放多环芳烃总量与煤种的挥发份有很大的关系。研究旨在为大气颗粒物的源识别、可吸入颗粒物的污染控制与资源综合等方面提供科学的依据。

关 键 词:可吸入颗粒物  重金属  多环芳烃

Characteristics of Inhalable Particulate Matters from Lignite and Bituminous Coal Combustion
ZHAO Cheng-mei,SUN Jun-min,LIU Hui-yong.Characteristics of Inhalable Particulate Matters from Lignite and Bituminous Coal Combustion[J].Environmental Science and Technology,2010,33(12).
Authors:ZHAO Cheng-mei  SUN Jun-min  LIU Hui-yong
Abstract:Granularity distribution,microstructure,heavy metals and polycyclic aromatic hydrocarbons of inhalable particulate matters from lignite and bituminous coal power plants were studied. Results showed that global particulates were dormant in inhalable particulate matters from different coal combustions. Contents of heavy metals and polycyclic aromatic hydrocarbons increased with reduction of granularity. There were more solid spheres and less porous and hollow spheres in inhalable particulate matters compared with original fly ash particles. Contents of heavy metals from lignite combustion were higher than bituminous coal combustion,with As content from lignite combustion apparently higher than bituminous coal combustion due to As content of lignite higher than bituminous coal. Contents of polycyclic aromatic hydrocarbons from lignite combustion were higher than bituminous coal combustion. Emission content of polycyclic aromatic hydrocarbons has much to do with coal volatile content. The study aimed to provide scientific foundation for source analysis of atmospheric particles,pollution prevention and utilization of inhalable particulate matters.
Keywords:inhalable particulate matter  heavy metals  polycyclic aromatic hydrocarbons
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