施工现场扬尘排放特征分析

为了研究施工扬尘排放特征,在施工现场进行颗粒物质量浓度、数浓度、粒径分布和气象参数的现场监测,分析施工现场颗粒物排放特征。结果显示,施工现场颗粒物浓度高于背景值,测试期间PM10浓度变化较大,并且出现短时间的浓度高值,工地内扬尘既受气象条件的影响又与工地现场的操作活动有关。从粒径方面看,施工现场粒径较大的颗粒物数量比例大于背景环境中的比例。施工现场PM10浓度与风速、温度和湿度呈正相关,工地内车辆运输和施工活动均为重要扬尘源。

Fugitive Dust Emission Characteristics from Construction Site by Field Measure

In order to study the Emission characteristics of fugitive dust in construction sites,the PM10 mass concentration,number concentration,size distribution,and meteorological parameters were monitored in the field.The results showed that the PM10 concentration is higher in the construction sites and have a strongly variation with very high concentration in short time.Both meteorological parameters and operant activity influence the PM10 concentration,and have a positive correlation with wind velocity,humidity and temperature.The transportation and construction operation is the main sources of fugitive dust.Viewed from the size distribution,coarse particle is more in the construction sites than background surroundings.