基于PMF模型的宝鸡市不同时期地表灰尘重金属来源解析  

An approach to the sources of surface dust heavy metals in Baoji city based on PMF model

作　　者：李雨茹 吴韬 张军[1,2] LI Yuru;WU Tao;ZHANG Jun(Shanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,Baoji University of Arts and Sciences,Baoji 721013;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Chang'an University,Xi'an 710064,China)

机构地区：[1]宝鸡文理学院陕西省灾害监测与机理模拟重点实验室,宝鸡721013 [2]长安大学旱区地下水文与生态效应教育部重点实验室,西安710064

出　　处：《干旱区资源与环境》2023年第6期147-154,共8页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(41771215);旱区地下水文与生态效应教育部重点实验室(长安大学)开放基金项目(300102290504);陕西省灾害监测与机理模拟重点实验室项目(20JS012);宝鸡文理学院校级研究生创新科研项目(YJSCX22ZD09)资助。

摘　　要：为研究宝鸡市采暖期和非采暖期地表灰尘重金属的来源,于2018年9月-2019年3月在宝鸡市区采集399份样品,使用ICP-MS测定地表灰尘4种重金属(Cd、Cr、Pb、Zn)含量,分析Cd、Cr、Pb、Zn的空间分布特征,利用PMF模型识别重金属污染来源及其贡献率,并结合地统计法识别各源的主要污染区域。结果表明:采暖期重金属Cd、Cr、Zn和非采暖期Cd的含量均值高于陕西省背景值,分别为其背景值的3.64、1.55、1.36和5.51倍;PMF源解析表明宝鸡市采暖期地表灰尘重金属的主要来源是燃煤源(36.83%)与交通源(23.42%);在非采暖期主要是工业源(37.12%)和交通源(33.21%)。In order to study the sources of heavy metals in surface dust during the heating period and non-heating period in Baoji city,399 samples were collected in Baoji city from September 2018 to March 2019,the content of four heavy metals(Cd,Cr,Pb,Zn)in surface dust was determined by ICP-MS,the spatial distribution characteristics of Cd,Cr,Pb and Zn were analyzed,the PMF model was used to identify the sources of heavy metal pollution and their contribution rate,and the main pollution areas of each source were identified by geostatistical method.The results showed that the average content of Cd,Cr,Zn and Cd in the heating period was 3.64,1.55,1.36 and 5.51 times higher than the background values in Shaanxi province,respectively,and the PMF source analysis showed that the main sources of heavy metals in surface dust during the heating period in Baoji city were from coal burning(36.83%)and traffic(23.42%).In the non-heating period,it was mainly from industries(37.12%)and traffic(33.21%).

关 键 词：地表灰尘 重金属 采暖期 非采暖期 源解析 PMF模型 

分 类 号：X51[环境科学与工程—环境工程]