华北地区南部城市秋冬季黑碳来源解析——基于改进后的黑碳仪模型  

Source apportionment of black carbon in autumn and winter in a southern city of Northern China:Based on the improved black carbon meter model

作　　者：辛治轩 牛大伟 张楠[1] 杨文[1] 孔少飞[3] 叶思杭 赵雪艳[1] 韩斌[1] XIN Zhi-xuan;NIU Da-wei;ZHANG Nan;YANG Wen;KONG Shao-fei;YE Si-hang;ZHAO Xue-yan;HAN Bin(State Key Laboratory of Environmental Benchmarking and Risk Assessment,Chinese Academy of Environmental Sciences,Beijing 100012,China;Luohe Environmental Monitoring Center,Luohe 462000,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,China;Service Center of the Ministry of Ecology and Environment,Beijing 100035,China)

机构地区：[1]中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012 [2]漯河市环境监控中心,河南漯河462000 [3]中国地质大学(武汉)环境学院,湖北武汉430074 [4]生态环境部机关服务中心,北京100035

出　　处：《中国环境科学》2024年第5期2386-2398,共13页China Environmental Science

基　　金：国家大气污染防治攻关项目(DQGG202137)。

摘　　要：为分析华北地区南部城市漯河市秋冬季黑碳(BC)浓度和来源的变化特征,使用7波段黑碳仪(AE33)于2022年9月1日~2023年2月28日在漯河市测量BC浓度,并使用改进后的钾离子动态约束黑碳仪模型进行源解析.此外,对元旦及春节期间烟花爆竹燃放对eBCEC和K^(+)的影响进行分析,以期对华北南部城市的BC污染控制提供合理的建议.结果表明,漯河市秋冬季eBCEC平均浓度为3.62μg/m^(3),冬季浓度(5.17μg/m^(3))约为秋季浓度(2.15μg/m^(3))的2.4倍.eBCEC昼夜浓度变化呈双峰型,峰值出现在8:00和21:00.使用改进后的黑碳仪模型解析出秋冬季BC主要来自化石燃料燃烧的贡献(74.69%±15.63%),其次为生物质燃烧贡献(25.31%±15.63%),控制化石燃料燃烧源对BC污染的改善更加有效.元旦、元宵节和春节等烟花爆竹燃放时段eBCEC的浓度均值分别为11.45、8.42和8.12μg/m^(3),分别为非烟花爆竹时段的2.6、1.9和1.8倍;春节、元宵节和元旦烟花爆竹燃放时段K^(+)浓度分别为26.11、16.23和5.79μg/m^(3),分别为非烟花爆竹时段的6.9、6.3和3.6倍;烟花爆竹燃放时段K^(+)浓度增幅明显高于eBCEC,会对约束模型结果造成干扰,建议使用该模型时剔除烟花爆竹燃放时段的数据.The concentration of black carbon(BC)was measured in Luohe City,southern North China,from September 1,2022,to February 28,2023,using a 7-band black carbon meter(AE33),and the variation characteristics of black carbon in autumn and winter in Luohe City were analyzed,and the source apportionment was carried out using the improved potassium ion dynamic constrained black carbon meter model.In addition,the effects of fireworks on eBCEC and K^(+)during the New Year's Day and Spring Festival were analyzed,in order to provide reasonable suggestions for BC pollution control in cities in southern North China.The results showed that the average concentration of eBCEC in autumn and winter was 3.62μg/m^(3),the concentration in winter(5.17μg/m^(3))was about 2.4times that the autumn concentration(2.15μg/m^(3)),and the daily concentration of eBCEC revealed a‘bimodal’distribution with peaks at 8:00 and 21:00.Using the improved black carbon meter model,it was found that the contribution of BC in autumn and winter was mainly from fossil fuel combustion(74.69±15.63%),followed by biomass combustion contribution(25.31±15.63%),and it was more effective to control the reduction of BC pollution from fossil fuel combustion sources.The average daily concentrations of eBCEC during fireworks and fireworks firing periods such as New Year's Day,Lantern Festival,and Spring Festival were 11.45,8.42 and 8.12μg/m^(3),respectively,which were 2.6,1.9 and 1.8 times of that during non-fireworks and fireworks periods,respectively.The average daily concentrations of K^(+)during Spring Festival,Lantern Festival,and New Year's Day were 26.11,16.23,and 5.79μg/m^(3),respectively,which were 6.9,6.3,and 3.6 times of that during non-fireworks and fireworks periods,respectively.The increased rate of K^(+)concentration during the above fireworks discharge period is significantly higher than that of eBCEC,which will interfere with the results of the constrained model.It is recommended that the data for the fireworks discharge period be excluded when us

关 键 词：黑碳(BC) 黑碳仪模型 吸收Ångström指数 烟花爆竹 源解析 

分 类 号：X513[环境科学与工程—环境工程]