长沙市郊区环境大气中颗粒物PM_(10)的质量浓度及其变化特性  

Mass concentration and variations of particulate matters PM_(10) in suburban air of Changsha,China

作　　者：王琪[1] 邓启红[1] 唐猛[1] 刘蔚巍[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2010年第6期2419-2423,共5页Journal of Central South University:Science and Technology

基　　金：全国高等学校优秀博士学位论文作者专项基金资助项目(200545);国家"十一五"科技支撑计划项目(2008BAJ12B03)

摘　　要：于2007-11—2008-10对长沙市郊区环境空气中的颗粒物PM10的质量浓度采用TEOM 1400a进行实时监测,以揭示城市颗粒物污染的主要特征及其变化趋势。研究结果表明:长沙市郊区颗粒物污染相当严重,PM10年平均质量浓度为(120.8±47.7)μg/m3,明显超出我国环境空气质量标准,其中秋、冬季节质量浓度高于夏季质量浓度;PM10质量浓度日变化受城市交通密度的影响显著,峰值分别出现于9:00与18:00附近,与早晚交通高峰期吻合;PM10质量浓度在工作日与周末存在明显差异,夏季周末质量浓度明显高于工作日质量浓度,而冬季则相反;颗粒物PM10与PM2.5质量浓度具有很好的相关性,说明我国现行采用的PM10环境空气质量标准评价城市空气质量仍是合适的。In order to investigate the mass concentration and variation characteristics of the particulate matters PM10 in the suburban air of Changsha,the mass concentration of PM10 was continuously measured by TEOM1400a during the period from November 2007 to October 2008.The results show that the particulate air pollution in Changsha is very serious,and the annual concentration（120.8±47.7） μg/m3 is much higher than the national ambient air quality standard（NAAQS）.The average PM10 mass concentration in autumn and winter seasons is higher than that in summer.The diurnal variations of PM10 mass concentration consist of two peak values that are mainly attributed to heavy traffic in rush hours.There is significant difference between the weekday and weekend for PM10 concentrations,and the concentration of weekends is higher than that of weekdays during summer but reverse phenomenon occurs during winter.The good relationship between PM10 and PM2.5 suggests that the underlying national PM10 standard is still suitable for assessing urban air quality in China.

关 键 词：空气质量 颗粒物 PM10 PM2.5 

分 类 号：X831[环境科学与工程—环境工程] X513