基于在线监测的上海郊区冬季PM2.5来源解析

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (3): 517–.

基于在线监测的上海郊区冬季PM2.5来源解析

王晓浩*,赵倩彪,崔虎雄

出版日期:2015-04-23 发布日期:2015-04-23
作者简介:(上海市环境监测中心,上海,200235)
基金资助:
上海市环境保护局青年基金（沪环科2014-98，沪环科2014-56)，上海市环境保护局2012年环境保护系列课题任务书 (shcg12-00058)

PM2.5 source apportionment at suburb of shanghai in winter based on real time monitoring

Wang Xiaohao1, Zhao Qianbiao1, Cui Huxiong1

Online:2015-04-23 Published:2015-04-23
About author:( Shanghai Environmental Monitoring Center, Shanghai,200235, China)

摘要/Abstract

摘要： 利用1405F、Marga和Xact625在线监测仪于2013年12月23日至2014年2月18日期间对上海市青浦淀山湖地区PM2.5的质量浓度和化学组分进行了测定。结果显示：淀山湖地区冬季PM2.5平均质量浓度为85.1 μg?m-3，高于国家环境空气质量年均二级浓度限值1.4倍，高出同期全市PM2.5平均浓度（65.5 μg?m-3）30%。无机离子组分占PM2.5的比重为58.4%，其中二次离子NO3-、SO42-和NH4+的含量最高，总体均值分别为（17.13±15.70）μg?m-3、（13.45±11.10）μg?m-3和（12.09±10.37）μg?m-3，分别占PM2.5浓度的20.1%、15.8%和14.2%。利用PMF方法对淀山湖地区PM2.5的来源解析结果显示：二次气溶胶、燃油、生物质燃烧/海盐、扬尘/建筑尘、燃煤/冶炼尘的贡献率分别为50.8%、17.5%、17.2%、7.7%和6.9%。

Abstract: PM2.5 mass concentration and chemical speciation were monitored at Dianshan Lake, a western Suburb of Shanghai by real time analyzers (1405F, Marga and Xact625 ) from 23rd Dec. 2013 to 18th Feb. 2014. The result showed that the average concentration of PM2.5 at Dianshan Lake was 85.1 μg?m-3, 1.4 times higher than the PM2.5 annual limit of the national ambient air quality standards of china, 30% higher than the PM2.5 average concentration of Shanghai (65.5 μg?m-3) . Total inorganic ions accounts for 58.4% of PM2.5 mass concentration, secondary inorganic ions (NO3-, SO42- and NH4+) were （17.13±15.70）μg?m-3、（13.45±11.10）μg?m-3 and（12.09±10.37）μg?m-3, accounting for 20.1%、15.8% and 14.2% of PM2.5 mass concentration, respectively. Positive Matrix Factorization (PMF) model was performed to identify the source of PM2.5 at Dianshan Lake. Five significant sources contributing to the observed PM2.5were: secondary aerosols, oil combustion, biomass burning/sea salt, fugitive dust and coal combustion/smelting dust, with the contribution of 50.8%, 17.5%, 17.2%, 7.7% and 6.9% of PM2.5 mass concentration, respectively.

王晓浩*,赵倩彪,崔虎雄. 基于在线监测的上海郊区冬季PM2.5来源解析[J]. 南京大学学报(自然科学版), 2015, 51(3): 517–.

Wang Xiaohao1, Zhao Qianbiao1, Cui Huxiong1. PM2.5 source apportionment at suburb of shanghai in winter based on real time monitoring[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(3): 517–.

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