Physicochemical properties and potential health effects of nanoparticles from pulverized coal combustion

查看全文 作　　者：YU DunXi XU MingHou YAO Hong LIU XiaoWei ZHOU Ke WEN Chang LI [1]Lin

机构地区：[1]State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Chinese Science Bulletin》索引2009年第54卷第7期,共8页

基　　金：Supported by National Natural Science Foundation of China (Grant Nos. 50721005 , 50706013 and 50720145604) 摘　　要：Nanoparticles are thought to induce more severe health impacts than larger particles. The nanoparticles from coal-fired boilers are classified into three size fractions with a 13-stage low pressure impactor. Their physicochemical properties are characterized by the high-resolution field emission scanning electron microscope and X-ray fluorescence spectrometer (XRF). The results show that coal-derived nanoparticles mainly consist of individual primary particles of 20―150 nm and their aggregates. Inor-ganic nanoparticles primarily contain ash-forming elements and their aggregates have a dense struc-ture. Organic nanoparticles are dominated by the element carbon and their aggregates have a loose structure. Nanoparticles from the same boiler have a similar composition and are primarily composed of sulfur, refractory elements and alkali/alkaline elements. Some transition and heavy metals are also detected. For different boilers, greater differences are observed in the production of the nanoparticles and their composition, possibly due to the use of low-NOx burners. Coal-derived nanoparticles have a small size, large specific surface area and complicated chemical composition, and thus are potentially more harmful to human health. 关键词：无机纳米粒子煤粉燃烧健康影响理化性质场发射扫描电子显微镜 X射线荧光光谱仪 X射线荧光光谱法燃煤锅炉

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Physicochemical properties and potential health effects of nanoparticles from pulverized coal combustion

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