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合肥市PM1.0污染特征及与PM2.5污染相关性
Characteristics of PM1.0 Pollution and Its Correlation with PM2.5 Pollution in Hefei City
投稿时间:2019-08-20  修订日期:2020-03-01
DOI:10.19316/j.issn.1002-6002.2020.03.04
中文关键词:  PM1.0  PM2.5  特征  污染传输  污染累积
英文关键词:PM1.0  PM2.5  characteristic  pollution transmission  pollution accumulation
基金项目:国家重点研发计划(2018YFC0213800)
作者单位
耿天召 安徽省环境监测中心站,安徽合肥230071 
赵旭辉 安徽省环境监测中心站,安徽合肥230071 
童欢欢 合肥工业大学 资源与环境工程学院,安徽合肥230009 
马啸 合肥工业大学 资源与环境工程学院,安徽合肥230009 
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中文摘要:
      对合肥市2014—2019年秋冬季节PM1.0、PM2.5、气象和理化性质等进行分析研究发现,PM1.0质量浓度呈现年度波动性下降趋势,其中2015—2016年度变化最为显著。同一年度内,月度浓度同样呈现波动性变化,总体表现为11、2月 PM1.0质量浓度相对较低,12、1月相对较高。无污染情形时(PM2.5浓度不高于75 μg/m3),PM1.0/PM2.5逐小时值相对平稳且比有污染情形(PM2.5浓度大于75 μg/m3)总体高约10%;有污染情形下,PM1.0/PM2.5小时值呈现较明显的日变化特征,09∶00呈现谷值,17∶00呈现峰值,日变化特征显著高于无污染情形。PM1.0质量浓度随着PM2.5级别的上升而逐渐增加,PM1.0/PM2.5值则呈减小的污染特征。严重污染时,PM1.0/PM2.5显著下降,PM1.0~2.5占比增加。传输型污染过程中,PM1.0与OC、PM2.5、SO2-4等呈现出显著的正相关性,污染来源主要为工业源、燃煤源、道路尘等,共占载荷为83.90%。本地累积型污染过程中,PM1.0与PM2.5、SO2-4、Ba和Cu等呈现出较好相关性,污染来源主要为烟花爆竹与二次生成,共占载荷为87.94%。
英文摘要:
      The PM1.0,PM2.5,meteorological,physical and chemical properties of Hefei City in autumn and winter from 2014 to 2019 were analyzed in this study.The results showed that the PM1.0 mass concentration exhibited an annual downward trend in fluctuation,of which the change from 2015 to 2016 was most significant.In the same year,the monthly concentration also showed fluctuating changes.The overall performance was that the PM1.0 mass concentration was relatively low in November and February and relatively high in December and January.When there was no pollution(PM2.5 concentration was not higher than 75 μg/ m3),the hourly ratio of PM1.0/PM2.5 was relatively stable and was about 10% higher than that in the case of pollution(PM2.5 concentration greater than 75 μg/m3).In the case of pollution,the hourly ratio of PM1.0/PM2.5 showed a obvious diurnal variation characteristic,presenting a valley value at 09∶00,a peak value at 17∶00,and the daily variation characteristic was significantly higher than that in the case of non-pollution.The PM1.0 mass concentration gradually increased with the rise of PM2.5 level,and the PM1.0/PM2.5 ratio showed a decreasing pollution characteristic. In the case of severe pollution,PM1.0/PM2.5decreased significantly,and the proportion of PM1.0-2.5 increased.During transmission pollution,PM1.0 had a significant positive correlation with OC,PM2.5, SO2-4,etc.The pollution sources were mainly industrial sources,coal-fired sources,road dust,etc,which together account for 83.90% of the load.During the local cumulative pollution process,PM1.0 showed a good correlation with PM2.5,SO2-4,Ba,Cu,etc.The main sources of pollution were fireworks and secondary generation,accounting for a total load of 87.94%.
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