摘要
利用大气重金属分析仪(Amms-100)获取宝鸡市高新区2020年3月1日-4月24日PM_(2.5)中金属元素的逐时数据,结合气象因素分析PM_(2.5)及其金属元素的日变化特征,并运用富集因子和正矩阵因子分解法探讨金属元素的来源。结果表明,高新区春季PM_(2.5)质量浓度为(51.5±25.2)μg/m^(3);金属元素的平均质量浓度为4.6μg/m^(3),约占PM_(2.5)的8.9%。日变化中,K、Al、Fe、Ca和Ba呈"双峰"分布;Zn、Pb和Co呈"单峰"变化。富集因子分析显示,Zn和Pb的EF值>40,主要来自人为源;Ca、Fe和V的EF值<1,主要来自于地壳;Cr、Cu、Mn和Ba的EF在2~5之间分布,受自然和人为两大来源共同作用。源解析结果表明,春季金属元素主要来源于扬尘源(44.3%)、交通源(26.5%)、工业源(20.9%)和燃烧源(8.3%)。
On-line monitoring was carried out in Baoji City by using the instrument(Amms-100) specifically for analysis of airborne metal elements in PM_(2.5), and the hourly monitoring data collected covering the period of March 1 to April 24, 2020,were associated with the local meteorological factors for analyzing the daily pollution variation characteristics of PM_(2.5) and metal elements. Additionally, sources of the metal elements in the atmosphere were analyzed using the enrichment factor method and positive matrix factorization method. Results of the monitoring and analysis showed that the mass concentrations of PM_(2.5) is(51.5±25.2)μg/m^(3);the average mass concentration of metal elements is 4.6μg/m^(3), accounting for 8.9% of PM_(2.5).So far as the diurnal variation, the changes of K, Al, Fe, Ca and Ba were basically similar, showing a kind of double peak distribution, while the changes of Zn, Pb and Co appeared single peak. As to the enrichment factor(EF), Zn and Pb were greater than 40, the source of Zn and Pb being human activities, and Ca, Fe and V(mainly from the earth crust) were less than 1, and the EF values of Cr, Cu, Mn and Ba ranged between 2 to 5, their enrichment being influenced by the interaction of natural and human sources. In conclusion, the source analysis indicated that the metal elements during spring season mainly came from dust sources(accounting for 44.3%), and also from traffic, industrial sources and combustion sources, accounting for 26.5%, 20.9% and 8.3%, respectively.
作者
周变红
王锦
曹夏
许东东
冯瞧
刘文霞
杨震龙
王勇
李建军
ZHOU Bianhong;WANG Jin;CAO Xia;XU Dongdong;FENG Qiao;LIU Wenxia;YANG Zhenlong;WANG Yong;LI Jianjun(Shaanxi Key Lab of Disaster Monitoring and Mechanism Simulation,College of Geography&Environment,Baoji University of Arts&Sciences,Baoji 721013,China;Key Lab of Aerosol Chemistry and Physics,State Key Lab of Loess and Quaternary Geology,Institute of Earth Environment,CAS,Xi’an 710061,China;Earth Environment Innovation Research Institute of Xi’an,Xi’an 710061,China;Environmental Monitoring Center Station of Baoji City,Baoji 721006,China;Environmental Monitoring Station of Xi’an City,Xi’an 710119,China;Baoji Hailan Engineering Consulting Co.Ltd,Baoji 721000,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第1期198-206,共9页
Environmental Science & Technology
基金
国家基金委面上项目(41977332)
国家大气重污染成因与治理攻关项目(DQGG-05-36)
陕西省自然科学基础研究项目(2019JQ4041)
中国科学院气溶胶化学物理重点实验室项目(KLACP2004)
宝鸡文理学院重点项目(ZK2018049)
宝鸡文理学院研究生创新科研项目(YJSCX20YB30)。
