Department of Environmental Sciences, Faculty of Science, Alexandria University, Alexandria, Egypt.
J Air Waste Manag Assoc. 2013 Aug;63(8):956-62. doi: 10.1080/10962247.2013.801374.
Indoor particulate matter samples were collected in 17 homes in an urban area in Alexandria during the summer season. During air measurement in all selected homes, parallel outdoor air samples were taken in the balconies of the domestic residences. It was found that the mean indoor PM2.5 and PM10 (particulate matter with an aerodynamic diameter < or = 2.5 and < or = 10 microm, respectively) concentrations were 53.5 +/- 15.2 and 77.2 +/- 15.1 microg/m3, respectively. The corresponding mean outdoor levels were 66.2 +/- 16.5 and 123.8 +/- 32.1 microg/m3, respectively. PM2.5 concentrations accounted, on average, for 68.8 +/- 12.8% of the total PM10 concentrations indoors, whereas PM2.5 contributed to 53.7 +/- 4.9% of the total outdoor PM10 concentrations. The median indoor/outdoor mass concentration (I/O) ratios were 0.81 (range: 0.43-1.45) and 0.65 (range: 0.4-1.07) for PM2.5 and PM10, respectively. Only four homes were found with I/O ratios above 1, indicating significant contribution from indoor sources. Poor correlation was seen between the indoor PM10 and PM2.5 levels and the corresponding outdoor concentrations. PM10 levels were significantly correlated with PM2.5 loadings indoors and outdoors and this might be related to PM10 and PM2.5 originating from similar particulate matter emission sources. Smoking, cooking using gas stoves, and cleaning were the major indoor sources contributed to elevated indoor levels of PM10 and PM2.5.
The current study presents results of the first PM2.5 and PM10 study in homes located in the city of Alexandria, Egypt. Scarce data are available on indoor air quality in Egypt. Poor correlation was seen between the indoor and outdoor particulate matter concentrations. Indoor sources such as smoking, cooking, and cleaning were found to be the major contributors to elevated indoor levels of PM10 and PM2.5.
在夏季，在亚历山大市的一个城区的 17 所住宅中采集了室内颗粒物样本。在所有选定住宅的空气测量中，都在住宅的阳台上采集了平行的室外空气样本。结果发现，室内 PM2.5 和 PM10（空气动力学直径<或=2.5 和<或=10 微米的颗粒物）的平均浓度分别为 53.5±15.2 和 77.2±15.1μg/m3。相应的室外平均水平分别为 66.2±16.5 和 123.8±32.1μg/m3。PM2.5 浓度平均占室内 PM10 总浓度的 68.8±12.8%，而 PM2.5 占室外 PM10 总浓度的 53.7±4.9%。室内/室外质量浓度（I/O）中位数比分别为 0.81（范围：0.43-1.45）和 0.65（范围：0.4-1.07），用于 PM2.5 和 PM10。仅发现 4 个家庭的 I/O 比大于 1，表明室内源有显著贡献。室内 PM10 和 PM2.5 水平与相应的室外浓度之间相关性较差。PM10 水平与室内和室外的 PM2.5 负荷显著相关，这可能与 PM10 和 PM2.5 源自相似的颗粒物排放源有关。吸烟、使用煤气炉做饭和清洁是导致室内 PM10 和 PM2.5 水平升高的主要室内源。
本研究首次提供了埃及亚历山大市住宅中 PM2.5 和 PM10 的研究结果。关于埃及室内空气质量的数据很少。室内和室外颗粒物浓度之间相关性较差。吸烟、烹饪和清洁等室内源被发现是导致室内 PM10 和 PM2.5 水平升高的主要原因。
