北京市冬季公共场所室内空气中TSP,PM_(10),PM_(2.5)和PM_1污染研究

Indoor air levels of TSP,PM_(10),PM_(2.5) and PM_1 at public places in Beijing during wintertime

在北京市的海淀区、朝阳区、丰台区和昌平区选择了 49个公共场所 (包括办公室、宾馆、图书馆、超市等等 ) ,分别对其室内空气中TSP ,PM10 ,PM2 5 和PM1的浓度进行了测定 ,并且对室内空气中粉尘含量的影响因素进行了分析和探讨 .研究结果表明 ,繁忙的交通状况和建筑施工将明显增加公共场所室内空气中TSP ,PM10 ,PM2 5 和PM1浓度 .频繁的室内清扫有助于降低室内空气中颗粒物的浓度 .在室内空气中 ,PM10 浓度与TSP浓度呈现明显的正向线性相关性 ,而PM2 5 和PM1的浓度与PM10

The objectives of this study were to characterize the indoor levels of TSP, PM_(10), PM_(2.5) and PM_1 at 49 public places representing different environments in urban area of Beijing. Additionally, the I/O ratios at nine public places were studied to understand the relationship between indoor and outdoor levels. The results indicated that indoor pollution caused by TSP, PM_(10), PM_(2.5) and PM_1 in the restaurants (RE) was most serious, and that in the libraries (LI) was the least. Construction activities and traffic conditions were the major factor influencing the indoor levels of TSP, PM_(10), PM_(2.5) and PM_1 at public places. The low I/O ratios indicated that the outdoor particles was one of the sources of the indoor particles. The indoor levels of TSP, PM_(10), and PM_(2.5) were well correlated with their corresponding outdoor concentrations. Only PM_1 was less correlated with its corresponding outdoor concentration (R^2<0.7). The indoor PM_(10) levels were well correlated with indoor TSP levels. Over 60% of TSP belonged to PM_(10). The levels of PM_(2.5) and PM_1 accounted for over 33% and 14%, respectively, of PM_(10) levels. PM_(2.5) and PM_1 levels were less correlated with PM_(10) levels.