摘要
为了解石家庄市大气颗粒物中有机碳和元素碳的季节变化特征,对春、夏、秋、冬四季采集的PM_(10)、PM_(2.5)样品中的有机碳(OC)和元素碳(EC)进行了分析。结果表明,石家庄市PM_(10)、PM_(2.5)污染严重;PM_(10)、PM_(2.5)中ρ(OC)和ρ(EC)季节变化特征均为夏季<春季<秋季<冬季。冬季PM_(10)中ρ(OC)和ρ(EC)分别为42.85和8.88μg/m^3;PM_(2.5)中ρ(OC)和ρ(EC)分别为41.2和8.59μg/m^3。PM_(2.5)中EC占比最高为3.9%,EC更容易在PM_(2.5)中富集;在四个季节中,冬季PM_(10)、PM_(2.5)中ρ(OC)/ρ(EC)为最高,分别为4.83和4.80,冬季取暖用燃煤加重了OC、EC的污染。冬季PM_(10)中二次有机碳ρ(SOC)为20.92μg/m^3,PM_(2.5)中ρ(SOC)为23.50μg/m^3。
In order to find out the seasonal variation characteristics of organic carbon （OC） and elemental carbon （EC） in atmos- pheric particulate matter in Shijiazhuang, the PM10 and PM2.5 samples were collected and analyzed. The results show that the PMlo and PM2.5 pollution is serious in Shijiazhuang. The seasonal variation characteristics of OC and EC in PM10 and PM2.5 bothranked in the order of summer 〈 spring 〈 autumn 〈 winter. The concentration of OC and EC in PM10 in winter was 42.85 and 8.88μg/m3 , respectively, while in PM2.5 , 41.2 and 8.59μg/m3 , respectively, EC accounted for 3.9% at most in PM2.5 , which showed that EC is apt to be concentrated in PM25. In winter, the value ofp（OC）/p（EC） in PM10 and PM25both reached to the highest, 4.83 and 4.80 respectively. The fire coal for heating in winter increased pollution of OC and EC. In winter, the concentration of SOC in PMw was 20.92μg/m3 , and the concentration of SOC in PM2.5 was 23.50μg/m3.
出处
《环境监控与预警》
2017年第2期41-45,共5页
Environmental Monitoring and Forewarning
基金
河北省科技计划基金资助项目(13273702D)
