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燃煤纳米颗粒物的物化特性及其潜在健康危害 被引量:4

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摘要 纳米颗粒物污染可能造成比粗颗粒更为严重的健康危害,但是相关知识还十分缺乏.利用低压撞击器将燃煤锅炉生成的纳米颗粒物细分成三个粒度段,采用高分辨率场发射电子显微镜和XRF对其物化特性进行了表征.结果表明燃煤纳米颗粒物主要为20~150nm的一次颗粒及其聚结体.无机纳米颗粒主要由无机成灰元素构成,其聚结体的结构较紧密.而有机纳米颗粒的主要成分为元素C,其聚结体的结构较松散.同一锅炉生成的纳米颗粒物具有相似的化学组成,主要含S、难熔元素和碱金属,碱土金属元素,还含有少量的过渡元素和其他重金属元素.不同锅炉纳米颗粒物的生成量及其元素相对含量存在差异,可能是使用了低NOx燃烧器的缘故.燃煤纳米颗粒物具有微尺度、高比表面积和复杂的化学构成等突出特点,可能对人体健康产生严重影响.
出处 《科学通报》 EI CAS CSCD 北大核心 2008年第21期2654-2660,共7页 Chinese Science Bulletin
基金 国家重点基础研究发展计划(编号:2002CB211602) 国家自然科学基金(批准号:50706013 50720145604)资助项目
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参考文献42

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