PDF(Pubmed)
Abstract：
Water-soluble and trace metal species in fine particulate matter (PM2.5) were determined for indoor and outdoor environments in Doha, Qatar. During the study period, PM2.5 concentrations showed significant variability across several indoor locations ranging from 7.1 to 75.8 μg m-3, while the outdoor mass concentration range was 34.7-154.4 µg m-3. The indoor and outdoor PM2.5 levels did not exhibit statistically significant correlation, suggesting efficient building envelope protection against outdoor PM2.5 pollution. Rather than outdoor sources, human activities such as cooking, cleaning, and smoking were the most significant influence on chemical composition of indoor PM2.5. NH4+ concentration was insufficient to neutralize SO42- indoors and outdoors, indicating the predominant presence of NH4HSO4. The enrichment factors indicated that outdoor Fe, Mn, Co, Cr, and Ni in PM2.5 mostly originated from crustal sources. In contrast, the remaining outdoor trace metals (Cu, Zn, As, Cd, Pb, and V) were mainly derived from anthropogenic sources. The indoor/outdoor concentration ratios revealed significant indoor sources for NH4+ and Cu. The crustal matter, water-soluble ions, and sea salt explained 42%, 21%, and 1% of the indoor PM2.5 mass, respectively. The same groups sequentially constituted 41%, 16%, and 1% of the outdoor PM2.5 mass.
摘要：
在多哈的室内和室外环境中确定了细颗粒物（PM2.5）中的水溶性和痕量金属种类，卡塔尔。在学习期间,PM2.5浓度在多个室内位置显示出显着差异，范围为7.1至75.8μgm-3，而室外质量浓度范围为34.7-154.4μgm-3。室内和室外PM2.5水平没有统计学上显著的相关性,建议有效的建筑围护结构防止室外PM2.5污染。而不是户外来源，人类活动，如烹饪，清洁,吸烟对室内PM2.5化学成分的影响最大。NH4+浓度不足以中和室内和室外的SO42-，表明NH4HSO4的主要存在。富集因子表明，户外Fe，Mn,Co,Cr,PM2.5中的Ni主要来自地壳来源。相比之下,剩余的户外微量金属(铜，Zn,As,Cd,Pb,和V)主要来自人为来源。室内/室外浓度比揭示了NH4和Cu的重要室内来源。地壳物质，水溶性离子，海盐解释了42%，21%,和1%的室内PM2.5质量，分别。同一组依次占41%，16%,和1%的室外PM2.5质量。
