摘要
本文选取秦皇岛港区为监测点,分别于夏、秋两季的代表月进行PM_(10)样品的采集与化学组分分析。结果表明,夏、秋两季采样期间秦皇岛港大气PM_(10)质量浓度平均值分别为93.5±44.6μg/m^3、131.5±69.1μg/m^3。夏、秋两季二次无机离子浓度分别为27.9μg/m^3与30.5μg/m^3,分别占总PM_(10)的29.8%与23.2%;夏季SO42-最高,浓度为11.7μg/m^3,占比为12.5%,秋季NO3-明显高于夏季,浓度为12.4μg/m^3。夏、秋季碳质组分浓度分别为26.3μg/m^3与33.5μg/m^3,占比分别为28.1%与25.5%;两季EC浓度相差不大,分别为4.1μg/m^3与4.4μg/m^3;一次排放是有机气溶胶的主要贡献源,两季POA占比分别为75.0%与73.5%。一次组分来源解析结果显示,土壤尘与冶金、机动车、燃煤、海盐与船舶是秦皇岛港大气PM_(10)的主要贡献源,平均贡献率分别为44.0%、16.5%、15.9%、10.8%与8.9%,港区空气污染治理应注重对船舶排放的控制。
A PM10 sampling was conducted on Qinhuangdao Port during represent months in summer and autumn. Detailed chemical components were further analyzed. Results showed that the average PM10 concentration during the sampling time was 93.54-44.6 μg/m^3 and 131.54-69.1 μg/m^3 for summer and autumn, respectively. The corresponding average concentration of secondary inorganic aerosols was 27.9μg/m^3 and 30.5μg/m^3, contributing approximately 29.8% and 23.2% of the total PM10, respectively. The SO4^2- had higher concentration in summer, with concentration and percentage of 11.7 μg/m^3 and 12.5%; while the NO3^- had obvious higher concentration in autumn （12.4 μg/m^3） . The average concentration of carbonaceous components was 26.3 μg/m^3 and 33.5 μg/m^3 in the two seasons, with contribution ratio of 28.1% and 25.5%, respectively. The EC concentration no obvious difference in summer （4.1μg/m^3） and autumn （4.4μg/m^3） . Primary emission was the major contributor to the organic aerosol. The POA contributed approximately 75.0% and 73.5% of the OA. Source apportionment results indicated that dust and metallurgy industry, motor vehicles, coal combustion, sea salt, and ship were the major contribution sources. The average contribution ratio was 44.0%、 16.5% 、 15.9%、 10.8% and 8.9%, respectively. Ship emissions should be paid special attention in the air pollution control in port districts.
出处
《交通节能与环保》
2017年第2期6-11,共6页
Transport Energy Conservation & Environmental Protection
