兰州地铁站灰尘重金属的PMF模型源解析与累积特征研究  

Source Apportionment and Accumulation Characteristics of Heavy Metals in Dust from Lanzhou Metro Station by PMF Model

作　　者：李旭 李军 焦亮[2] 李开明 台喜生[1] 臧飞[3] 陈伟 杨云钦[1] LI Xu;LI Jun;JIAO Liang;LI Kaiming;TAI Xisheng;ZANG Fei;CHEN Wei;YANG Yunqin(College of Urban Environment,Lanzhou City University,Lanzhou,Gansu 730070,China;Key Laboratory of Resource Environment and Sustainable Development of Oasis,Gansu Province,Northwest Normal University,Lanzhou,Gansu 730070,China;College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou,Gansu 730020,China)

机构地区：[1]兰州城市学院城市环境学院,甘肃兰州730070 [2]西北师范大学甘肃省绿洲资源环境与可持续发展重点实验室,甘肃兰州730070 [3]兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《环境监测管理与技术》2024年第4期36-42,共7页The Administration and Technique of Environmental Monitoring

基　　金：甘肃省科技计划基金资助项目(24JRRA530);甘肃省绿洲资源环境与可持续发展重点实验室开放课题基金资助项目(GORS202102);甘肃省高等学校科研基金资助项目(2023A-116)。

摘　　要：通过在兰州地铁站站台布设11个调查样点,监测分析地表灰尘元素As、Cr、Cu、Mn、Ni和Pb累积特征及来源。结果表明:兰州地铁站站外和站内地表灰尘中As、Cr、Cu、Pb的平均值均高于甘肃省和兰州市土壤背景值;站内地表灰尘以Cr、Cu、Ni和Pb为主要污染物,站外污染以Cu和Pb为主,且站内地表灰尘重金属综合污染整体高于站外;源解析结果显示,站内地表灰尘重金属主要来源于交通源和人为污染源的混合源、工业源、交通源和大气沉降源的混合源,贡献率分别为30.0%、33.6%、36.4%,站外主要来源为交通源和大气沉降源的混合源、燃煤源和交通源的混合源、交通源,贡献率分别为38.7%、29.6%、31.7%。Setting 11 sampling sites on the platforms of Lanzhou metro station,the accumulation characteris-tics and sources of As,Cr,Cu,Mn,Ni,and Pb in ground dust were monitored.Results indicated that the aver-age concentrations of As,Cr,Cu,and Pb in ground dust inside and outside the metro station were higher than the soil background values in Lanzhou and Gansu.Cr,Cu,Ni,and Pb were the main pollutants in ground dust inside the station,while Cu and Pb were dominated in ground dust outside the station.Heavy metal pollution in ground dust inside the station was higher than that outside the station.Source apportionment re-sults showed that heavy metals in ground dust inside the station mainly came from the mixed sources of transpor-tation and anthropogenic pollution,industrial source and the mixed sources of transportation and atmospher-ic deposition,with contribution rates of 30.0%,33.6%and 36.4%,respectively.For the dust outside the sta-tion,they were mainly from the mixed sources of transportation and atmospheric deposition,the mixed sources of coal combustion and transportation,and transporta-tion source,with contribution rates of 38.7%,29.6%and 31.7%,respectively.

关 键 词：重金属 地表灰尘 源解析 PMF模型 地铁站 兰州 

分 类 号：X513[环境科学与工程—环境工程]