北仑区域大气中黑碳气溶胶特征研究

Study on Pollution Characteristics of Black Carbon Aerosol in Beilun

利用2012年-2014年在北仑城区的黒碳气溶胶及相关的能见度、SO2、NO2、CO、O3、PM1、PM2.5因子的监测结果,研究区域黒碳气溶胶的污染特征及与其他相关因子的关系等。结果表明,黒碳气溶胶随着浓度的不同组分会有所差异。另外,区域内的黒碳气溶胶的本底值为1.25μg/m3,在国内大城市中处于相对低位,但远高于全球本底值;黒碳气溶胶对消光的贡献为12.13%;与SO2等的相关性分析表明,其与PM2.5、PM1、NO2均为强正相关,与SO2和CO均为中等强度正相关,而与O3则显示了负的指数相关。

Based on the monitoring data of black carbon aerosol( BC),PM2. 5,PM1,SO2,NO2,CO,O3 and visibility at Beilun from 2012 to 2014,this paper analyzed the characteristics of BC and influencing factors. The results show that the composition was different in the different BC mass concentration. The base BC mass concentration was 1. 25 μg / m3,which was lower than most of the cities in China,but was higher than global base. The extinction proportion of BC was 12. 13%,and that was higher in winter than in summer. There were strongly positive correlations between BC and PM2. 5,PM1,NO2,and positive correlations between BC and SO2,CO also existed,furthermore,a negative exponent correlation was found between BC and O3.