| 电厂燃煤烟尘PM2.5中化学组分特征 |
| 摘要点击 2975 全文点击 4643 投稿时间：2015-06-17 修订日期：2015-08-21 |
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| 中文关键词 PM2.5 燃煤烟尘 成分谱 富集因子 分歧系数 |
| 英文关键词 PM2.5 coal dust source profiles enrichment factor coefficient of divergence |
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| 中文摘要 |
| 采集了阳泉市具有代表性的燃煤电厂除尘器下载灰,测定了其PM2.5中元素、离子及EC(元素碳)、OC(有机碳)的含量水平,对其化学组分特征进行了研究,并运用分歧系数法对阳泉与其他地区的燃煤烟尘PM2.5成分谱之间的相似程度进行了比较. 结果发现,阳泉市电厂燃煤锅炉排放的细颗粒物(PM2.5)中主要组分为SO42-、Ca、NO3-、OC、EC、Al、Si、Na、Fe、Mg以及Cl-,占PM2.5总质量的57.22%; Pb在燃煤烟尘PM2.5中相对富集系数最大,达到10.66~15.91,呈显著富集; 无烟煤和劣质煤燃烧后烟尘的PM2.5成分谱之间的分歧系数为0.072,认为这两个成分谱必定相似,与其他城市所建立的燃煤烟尘成分谱相比,阳泉市燃煤电厂PM2.5的化学组分具有特异性,尤其是Ca含量明显高于国内其他地区燃煤烟尘Ca的排放. |
| 英文摘要 |
| The ashes under dust catcher of typical power plants in Yangquan was collected and the contents of elements, irons, EC(elemental carbon)and OC(organic carbon)were measured in PM2.. The characteristics of its chemical composition was studied and the degree of similarity of coal dust's source profiles of PM2.5 between Yangquan and other cities were compared using the coefficient of divergence method. The result indicated that the main chemical components of PM2.5 from the coal dust were SO42-,Ca,NO3-,OC,EC,Al,Si,Na,Fe,Mg and Cl-, accounting for 57.22% of the total mass. The enrichment factor of Pb in PM2.5of coal dust was the largest with a significant enrichment condition, reaching 10.66-15.91.The coefficient of divergence of source profiles of PM2.5between blind coal and fault coal was 0.072, so it was believed that they must be similar. Compared with other cities, the chemical composition of coal dust in Yangquan had specificity, in particular, the content of Ca was obviously higher than those in other domestic cities. |
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