摘要
为了探讨宁波市大气颗粒物中浓度水平与季节变化,2010年1、5、8、11月分季节采集了宁波市大气中PM10样品,在宁波连续观测了PM10以及有机碳(OC)、元素碳(EC)的浓度变化,并探讨宁波全年各季碳气溶胶污染变化特征;PM10中OC和EC相关性较好,说明OC与EC的来源相同,各采样点PM10中OC/EC的各季均值大部分超过2.0,表明宁波空气中存在一定的二次污染。宁波秋季SOC占OC含量高于其他季节。从PM10中8个碳组分丰度初步判断宁波市颗粒物中碳的主要来源是汽车尾气、道路扬尘及燃煤。
In order to study the concentration of carbon with season change in Ningbo City, samples were collected in January, March, Augest,November, 2010. The correlation between OC and EC is significant in PM10 ,which showed the source of OC and EC was the same in genera1. Moreover,the average OC/EC ratios in PM10 of the sites all exceeded 2？0. It suggested that there existed secondary organic carbon in ambient air of Ningbo. The average mass concentration of SOC in autumn was significantly higher than in other seasons. The percentage of eight carbon fractions in PM10 indicated that coal combustion,vehicle exhaust and road dust were primary sources of particulate pollution of Ningbo in winter.
出处
《中国环境监测》
CAS
CSCD
北大核心
2014年第1期49-52,共4页
Environmental Monitoring in China
关键词
PM10
有机碳
无机碳
二次有机碳
organic carbon
lemental carbon
secondary organic carban
organic carbon
lemental carbon
secondary organic carban
