摘要
扬尘是颗粒物的一种重要污染源类,主要包括土壤扬尘、道路扬尘、建筑扬尘、采矿扬尘等,但是针对采矿扬尘源成分谱的分析较少见。以采矿扬尘为研究对象,进行源样品采集和化学组分分析,构建相应的源成分谱,同时还与其他典型的污染源类(土壤扬尘、建筑扬尘、煤烟尘)进行比较。结果表明:(1)采矿扬尘中主量成分为Si、Al、Ca、有机碳(OC)和Fe,其质量浓度分别为(0.13±0.01)、(0.07±0.01)、(0.07±0.02)、(0.03±0)、(0.02±0)g/g。(2)采矿扬尘中Al/Si、Al/Ca、Si/Ca与其他源中对应的比值较相似,无明显的特征,说明采矿扬尘源成分谱与其他源具有较强的相似性。(3)采矿扬尘与土壤扬尘、建筑扬尘、煤烟尘源成分谱的分歧系数分别为0.49、0.36、0.39,表明采矿扬尘与其他3类源成分谱之间可能相似。
Dust was an important pollution source of particulate matter （PM）,including soil resuspended dust, road dust, cement dust, mineral dust and so on. However, the characteristic components of mineral dust were scarcely investigated. To fill this gap, mineral dust was investigated and the chemical species were analyzed to establish the corresponding source profiles. In addition, other typical sources （soil resuspended dust,cement dust and coal combus- tion） were investigated in this study,and were compared with mineral dust. The results were shown that： （1） for mineral dust,the major species wereSi （（0.13± 0.01） g/g）,A1 （（0.07 ±0.01） g/g）,Ca （（0.07±0.02） g/g）,OC （（0.03±0） g/g） and Fe （（0.02±0） g/g）. （2） For each source,ratios between Si,A[ and Ca were calculated,showing that A1/Si,A1/Ca and Si/Ca ratios for mineral dust were similar to those of other three sources. （3） Coefficient of di vergence （CD） analysis was employed to study the difference between mineral dust and other sources. The CD values were 0.49 （between mineral dust and soil resuspended dust）,0.36 （between mineral dust and cement dust） and 0.39 （between mineral dust and coal combustion）, respectively, implying that the source profiles of mineral dust might be similar to other typical sources.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2016年第1期36-40,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.21207070、No.41205089)
关键词
颗粒物
采矿扬尘
源成分谱
比值分析
分歧系数
particulate matter
mineral dust
source profiles
ratio analysis
coefficient of divergence
