沈阳市分季节环境空气PM_(2.5)组分特征分析与来源解析  

Component characteristics and source apportionment of ambient air PM_(2.5) at multi-seasons in Shenyang

作　　者：赵帝 卞思思[1,2] 王帅 王剑虹 王维宽[1,2] 祝胜男[1,2] 侯乐 刘岩 林宏 邵春岩 ZHAO Di;BIAN Sisi;WANG Shuai;WANG Jianhong;WANG Weikuan;ZHU Shengnan;HOU Le;LIU Yan;LIN Hong;SHAO Chunyan(Shenyang Academy of Environmental Sciences,Shenyang 110000,China;Liaoning Provincial Key Laboratory of Atmospheric Environmental Pollution Prevention and Control,Shenyang 110000,China;Shenyang Ecological Environment Monitoring Center of Liaoning Province,Shenyang 110000,China;Shenyang Environmental Technology Assessment Center,Shenyang 110000,China)

机构地区：[1]沈阳环境科学研究院,辽宁沈阳110000 [2]辽宁省城市大气环境污染防治重点实验室,辽宁沈阳110000 [3]辽宁省沈阳生态环境监测中心,辽宁沈阳110000 [4]沈阳市环境技术评估中心,辽宁沈阳110000

出　　处：《环境保护科学》2021年第2期128-135,共8页Environmental Protection Science

基　　金：国家重点研发计划(2017YFC0212500)。

摘　　要：研究组对2017年沈阳市3个采样点位的环境空气PM_(2.5)进行了采样,分析了PM_(2.5)的质量浓度及其中的离子、碳和无机元素的含量,并利用正定矩阵因子分解(PMF)模型对各点位各季节PM_(2.5)的来源进行了解析。结果表明,观测期间沈阳市各观测点位环境空气PM_(2.5)质量浓度范围为27~129μg/m^(3),其浓度夏季最低,秋季最高;工业聚集区的浓度明显高于市内其他地区;各类源对沈阳市2017年PM_(2.5)的分担率依次为:二次硝酸盐27.4%>交通源21.0%>燃煤源和餐饮油烟源17.6%>二次硫酸盐和石油燃烧源16.1%>工业源8.5%>土壤扬尘5.8%>刹车粉尘3.6%。可以看出,沈阳市环境空气PM_(2.5)的组成呈现出较为明显的季节特征,二次颗粒物对沈阳市PM_(2.5)浓度有较高贡献,沈阳市应加强对二次颗粒物前体物的控制。The ambient air PM_(2.5) samples were collected at three locations of Shenyang in 2017,these samples were analyzed for mass,ions,carbon and inorganic elements.The Positive Matrix Factorization(PMF)model was applied for the source apportionment of the ambient air PM_(2.5) at multi-seasons.The results showed that the concentration of PM_(2.5) at each observation point in Shenyang ranged from 27μg/m^(3) to 129μg/m^(3).The concentration of PM_(2.5) in summer was the lowest,while the concentration was the highest in autumn.The concentration of PM_(2.5) in the industry region was significantly higher than the other regions of Shenyang.The main sources of PM_(2.5) in Shenyang in 2017 were the secondary nitrate(27.4%),the traffic source(21.0%),coal-burning sources and catering fume sources(17.6%),the secondary sulfate and petroleum combustion sources(16.1%),industrial sources(8.5%),soil dust(5.8%),brake dust(3.6%).The contribution order of the main sources indicated that the composition of the ambient air PM_(2.5) in Shenyang in different seasons was quietly different.The secondary particulate matter contributed to the ambient air PM_(2.5) in Shenyang with a great extent.Thus,the precursor of the secondary particulate matter needed to be improved in Shenyang.

关 键 词：PM_(2.5) 组分特征 来源解析 正定矩阵因子分解(PMF) 沈阳市 

分 类 号：X830[环境科学与工程—环境工程]