南华大学学报（自然科学版）Issue(3)：103-107,5.
衡阳市夏秋季大气颗粒物污染特征
Characterization of Atmospheric Particulates in Hengyang During Summer and Autumn
摘要
Abstract
In order to understand the pollution level of atmospheric particulates and the characteristics of distribution in Hengyang,field measurements were carried out during Au-gust 25~27 and November 27~29 of 2013 . Five measuring points were selected along the side of the main road, and one point was at the University of South China. The result showed that the concentration of PM2. 5 was significantly higher in autumn than in summer. The numerical density of PM2. 5 in autumn was 2. 27~3. 13 times and the mass concentra-tion was 1. 74~3. 74 times higher in autumn than in summer. In general,the size of parti-cles was almost below 5 μm in diameter,and the dominant particles were less than 1 μm. The PM2. 5 concentration was highest at 8 am and 8 pm,but was lowest at noon and in the afternoon. Mass concentrations of PM2. 5 and PM10 were less than the national standard lim-its in Summer,but some areas beyond the limits in autumn. Then the six measuring points were ranked according to the degree of pollution. This study provides evidence that wate-ring can reduce PM2. 5 and PM10 concentration and the best result of particle reduction is between 11 to 24 hours after watering.关键词
衡阳/PM2. 5/PM10/有效性验证Key words
Hengyang/PM2. 5/PM10/effectiveness verification分类
资源环境引用本文复制引用
杨蓉,叶勇军,蒋复量,王淑云..衡阳市夏秋季大气颗粒物污染特征[J].南华大学学报（自然科学版）,2014,(3):103-107,5.基金项目
衡阳市科技计划基金资助项目(2012KJ26) （2012KJ26）
