摘要
2015年,于哈尔滨市香坊区东北林业大学校园内外选取6个取样点,对大气颗粒物进行了周期性的连续取样,即每月例行取样和每日不同时间段取样,根据取样所得数据,对大气颗粒物粒径分布及数量浓度变化特征进行分析。研究表明:6种不同粒径范围的颗粒物浓度呈现逐月递减趋势,最高值出现在3月份,4月份颗粒物浓度下降十分明显,粒径范围为0.3~0.5、0.5~1.0、1.0~2.0μm的大气颗粒物数量浓度最低值出现在6月份,粒径范围为2.0~5.0、5.0~10.0、10.0~∞μm的大气颗粒物数量浓度最低值出现在5月份;不同粒径颗粒物在取样日不同时间的分布情况基本一致,早晚高峰期,颗粒物浓度相对其它取样时间较高;A、B和F点位颗粒物浓度较C、D和E点位高,6种不同粒径范围的颗粒物浓度最高值出现在B、F点位,最低值均出现在C点位。
In 2015,a total of six sampling sites were selected in the campus of Northeast Forestry University in Xiangfang District of Harbin. The particulate matters in the samplying sites were periodically tested,including monthly routine testing and daily testing at different time. Based on the obtained data by sampling,the size distribution and concentration variation of the atmospheric particles in Harbin were analyzed. The results showed that the concentration of six kinds of particles with different size decreased month by month,and reached the highest value in March. The particulate matter concentration decreased significantly in April. The number concentration of atmospheric particles in the size range of 0. 3 ~ 0. 5、0. 5 ~ 1. 0 and 1. 0 ~ 2. 0 μm reached the lowest value in June,and the number concentration of atmospheric particles in the size range of 2. 0 ~ 5. 0、5. 0 ~ 10. 0 μm and 10. 0 μm ~ ∞ reached the lowest value in May. At different sampling times,the particle size distributions were similar. Compared to other sampling time,in the morning and evening rush hour,the number concentration of atmospheric particles were higher. The number concentration of atmospheric particles at A,B or F higher than that in C,D and E. The highest concentration of six kinds of particles with different size appeared at B or F site,while the lowest value was in site C.
出处
《森林工程》
2015年第6期59-64,79,共7页
Forest Engineering
基金
国家科技支撑项目(2015BAD07B03)
关键词
大气颗粒物
数量浓度
粒径分布
相关性
PM
number concentration
particle size distribution
correlation