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Characteristics of Particle Mass Concentrations in University Classrooms of Changsha,China

机译：长沙大学教室中粒子质量浓度的特征

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The mass concentrations of PM10 and PM2.5 were investigated in twelve university classrooms of Changsha from September 2007 to January 2008.The effect of indoor activity and outdoor pollutant on indoor particle concentration levels were also analyzed.Long periods monitoring was conducted using TEOM and DustTrack under natural ventilation condition.Mean 24-h indoor concentrations of PM10 and PM2.5 were 128.44 and 95.31 μg/m3 on workdays and 122.49 and 105.05 μg/m3 on weekends,respectively.The results showed that diurnal variation of PM10 was more evident than PM2.5,indicating that PM10 was mainly influenced by human activities.For several classrooms near to the main road in the school,fine particles would be more correlated with outdoor particle pollution ascribed to traffic.The correlation between indoor and outdoor PM10 showed that indoor particle concentrations were influenced by outdoor concentrations under non-activity conditions.High indoor to outdoor ratios (I/O) were observed when intense activities took place.High peak values were also found in both morning (7:00-9:30 am) and evening (7:30-10:30 pm),which mainly attributed to human activities during the periods of going to school and back to the dormitory.
机译：于2007年9月至2008年1月在长沙市12所大学教室对PM10和PM2.5的质量浓度进行了调查，分析了室内活动和室外污染物对室内颗粒物浓度的影响，并使用TEOM和DustTrack进行了长期监测在自然通风条件下，工作日内24小时室内PM10和PM2.5的平均浓度分别为128.44和95.31μg/ m3，在周末分别为122.49和105.05μg/ m3。结果表明，PM10的日变化比PM2.5，表明PM10主要受到人类活动的影响。对于学校主要道路附近的几间教室，细颗粒物与交通引起的室外颗粒物污染之间的相关性更大。室内和室外PM10的相关性表明，室内在非活性条件下，颗粒物浓度受室外浓度的影响。观察到较高的室内/室外比（I / O）在上午（7：00-9：30 am）和晚上（7：30-10：30 pm）都发现了高峰值，这主要归因于在放学回到宿舍。

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