太原市及周边采暖季大气PM_(2.5)中重金属污染特征及来源解析  

Pollution Characteristic and Source Analysis of Heavy Metals in Atmospheric PM_(2.5) During Heating Season in Taiyuan and Surrounding Area

作　　者：王志磊 刘效峰[1] 张姝婷 白慧玲[1] 牟玲[1] 李璇 WANG Zhilei;LIU Xiaofeng;ZHANG Shuting;BAI Huiling;MU Ling;LI Xuan(College of Environmental Sciences and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学环境科学与工程学院,太原030024

出　　处：《太原理工大学学报》2021年第3期382-390,共9页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(41502324)。

摘　　要：为研究太原市及周边采暖季PM_(2.5)中重金属的污染特征及来源,于2018年1月采集太原市及榆次大学城大气PM_(2.5)样品,利用等离子体质谱仪测定其中10种重金属元素,使用富集因子法和聚类分析法明确其来源,结合HYSPLIT后向轨迹模型分析两个区域的空间传输过程。结果表明,锌、铅和锰为太原市和榆次大学城采暖季PM_(2.5)中重金属质量浓度最高的3种元素,分别占10种元素总浓度的77.80%和89.06%.铜、锌、砷、镉和铅在太原市和榆次大学城PM_(2.5)中富集水平为中度以上,主要受人为源影响。通过聚类分析发现,太原市和榆次大学城采暖季PM_(2.5)中重金属的主要污染源为燃煤源。太原市和榆次大学城受来自于西北方向的长距离传输气流影响而形成的扬尘是太原市和榆次大学城PM_(2.5)中10种重金属的自然源之一。同年采暖季中,12月为PM_(2.5)中重金属质量浓度最高的月份。In order to study the pollution characteristics and sources of heavy metals in PM 2.5 around Taiyuan City during the heating season,atmospheric PM 2.5 samples were collected in Taiyuan City and Yuci University Town in January 2018.Plasma mass spectrometry was used to determine 10 heavy metal elements.Enrichment factor method and cluster analysis method were used to clarify their sources.The backward trajectory method was adopted to analyze the influence of air mass migration.The results show that zinc,lead,and manganese were the three elements with the highest heavy metal concentrations in the heating season PM 2.5 in Taiyuan City and Yuci University Town,accounting for 77.80%and 89.06%of the total concentration of the 10 elements,respectively.The enrichment level of Cu,Zn,As,Cd,and Pb in Taiyuan City and Yuci University Town PM 2.5 was above moderate.The main source of heavy metals in PM 2.5 in the heating season of Taiyuan City and Yuci University Town was coal-fired sources.Taiyuan City and Yuci University Town were affected by the long-distance air flow from the northwest.The dust formed by the flow was one of the natural sources of 10 heavy metals in PM 2.5 in Taiyuan City and Yuci University Town.In the heating season of the same year,December was the month with the highest heavy metal concentration in PM 2.5.

关 键 词：PM_(2.5) 重金属 富集因子 聚类分析 后向轨迹 

分 类 号：X513[环境科学与工程—环境工程]