摘要
2012年6月9—17日,使用单颗粒气溶胶质谱仪(SPAMS)分析了鹤山大气中单颗粒的特征,共采集到同时含有正负离子谱图的颗粒763350个,其粒径主要集中在0.2～2.0μm之间,期间发生灰霾的天数为3d.研究结果表明,该地区的大气颗粒物类型主要可分为7种:元素碳(EC)、有机碳(OC)、元素-有机碳混合(ECOC)、大分子有机碳(HMOC)、海盐(Na-K)、富钾颗粒(K-rich)和富铅颗粒(Pb-rich)。灰霾天气下,颗粒中的二次成分含量更高,粒径显著增大。各颗粒类型数量浓度均有一定程度的提高,其中,以EC、ECOC和K-rich的增加最为明显。分析结果表明,水稻秸秆的集中焚烧及EC、ECOC和K-rich的老化是形成本次灰霾的重要原因.
Characteristics of individual particles were analyzed by a Single Particle Aerosol Mass Spectrometry（SPAMS） at Heshan super site,from 9 to 17 June 2012.3 hazy days were captured.A total of 763350 particles in the size range of 0.2~2.0 μm were chemically analyzed with both positive and negative ion spectra.The results revealed that ambient aerosol could be classified into seven major classes,including of elemental carbon（EC）,organic carbon（OC）,internally mixed elemental-organic carbon（ECOC）,high mass organic carbon（HMOC）,sea salt（Na-K）,K-rich and Pb-rich particles.During the hazy days,particles contained much more secondary components,and size distribution shifted towards larger sizes.Haze facilitated the increase of particle concentration,especially for EC,ECOC and K-rich.The results also suggested that centralized burning of rice straw and the aging of EC,ECOC and K-rich substantially contributed to the formation of haze.
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第8期2098-2104,共7页
Acta Scientiae Circumstantiae
基金
中国科学院战略性先导科技专项(B类)(No.XDB05020205)
广东省自然科学基金项目(No.S2012010008749)~~
