摘要
为了解鹤山大气含碳颗粒物的粒径分布特征,于2014年7月和2015年1月,以广东省大气超级监测站为观测平台,采用10级串联撞击式采样器MOUDI采集了鹤山市夏季和冬季的大气颗粒物,用美国Sunset有机碳/元素碳分析仪对其中的有机碳(OC)和元素碳(EC)进行了分析。结果表明,鹤山夏季和冬季PM、OC和EC均主要集中在小于3.2μm的粒径段。其中OC和EC在0.32~1.0μm粒径段浓度最大,夏季分别为(2.26±0.72)μg/m^3和(0.89±0.36)μg/m^3,冬季分别为(10.85±5.49)μg/m^3和(1.47±0.71)μg/m^3。晴天OC浓度明显在各个粒径段都大于雨天,而EC浓度在晴雨天变化不明显。灰霾天气PM、EC和OC在各个粒径段的浓度都大于优良天气。鹤山大气中的OC和EC相关性以及SOC质量浓度在不同天气情况下存在较大差异。
To understand the size distribution characteristics of carbon-containing particles in Heshan,the air was sampled by a ten-stage micro orifice uniform deposit impactor（MOUDI） in July,2014 and January,2015 in Guangdong Atmospheric Supersite.The organic carbon（OC） and elemental carbon（EC） were analyzed using a thermal/optical carbon analyzer（Sunset Lab Inc.,USA）.The results revealed that particlate matter（PM）,OC and EC were mainly enriched in 3.2 μm particle in Heshan summer and winter.OC and EC were more concentrated in the size range of 0.32- 1.0 μm.The mass concentrations in summer were（2.26 ±0.72）μg/m^3 and（0.89±0.36） μg/m^3 and in winter were（10.85 ±5.49） μg/m^3 and（1.47 ±0.71） μg/m^3 for OC and EC,respectively.It is demonstrated obviously that the OC concentrations in sunny days were greater than rainy days,but EC did not changed significantly.Higher mass concentrations of PM,OC and EC in all sizes were found in hazy days compared to clear days.The correlations between OC and EC as well as the mass concentration of SOC varied as the weather type changed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2015年第12期1934-1941,共8页
Chinese Journal of Analytical Chemistry
基金
中国科学院战略性先导科技专项(XDB05040502)
国家科技支撑计划(2014BAC21B01)
"先导2014"京津冀地区灰霾综合外场实验(KJZD-EW-TZ-G06-01-18)项目资助~~
关键词
有机碳
元素碳
粒径分布
二次有机碳
Organic carbon
Elemental carbon
Size distribution
Secondary organic carbon
