古田山庄环境空气PM_(10)、PM_(2.5)和PM_(1.0)日变化特征

Daily variation of ambient air PM_(10),PM_(2.5),and PM_(1.0) in Gutian Villa,Longyan

通过测定古田山庄环境空气PM_(10)、PM_(2.5)和PM_(1.0)质量浓度及数目浓度,获得其日变化特征,以了解古田山庄空气质量水平、变化规律及影响因素。结果表明:古田山庄环境空气符合国家一级质量标准;PM_(10)、PM_(2.5)和PM_(1.0)的质量及数目浓度均呈现早晨较高、中午下降、傍晚回升之变化趋势,此为当地污染源排放与环境条件共同作用的结果;随着环境空气温度升高、相对湿度降低、光照增强,各颗粒物质量浓度普遍降低,细颗粒物和超细颗粒物比重(PM_(2.5)/PM_(10)、PM_(1.0)/PM_(10))普遍升高。颗粒物粒径越大,质量、数目浓度降低程度越大,对气温、相对湿度和光照强度的响应越好。

in order to understand ambient air quality,variation rules and impact factors of Gutian Villa,mass and number concentration of ambient air PM10,PM2. 5,and PM1. 0in Gutian Villa was measured and daily variation characteristics were obtained. The results show that PM10 and PM2. 5in Gutian Villa can meet first grade criteria of State Ambient Air Quality Standards. Both mass and number concentration of PM10,PM2. 5,and PM1. 0show a daily trend of being higher in the morning,lower at noon and recovered in the evening due to synergistic effect of local emissions and environmental conditions. As the ambient air temperature get higher,relative humidity is decreased,and light intensity is enhanced,mass concentrations for each type of particle are generally declined and fine particulate matter and ultrafine particles mass ratio（ PM2. 5/ PM10 and PM1. 0/ PM10） are increased. Generally speaking,the larger the particle diameter is,the greater decreased degree of mass and number concentrations,and the better response to temperature,relative humidity and light intensity.