ZHANG Yujie1a,2,ZHANG Qian1,WEN Xuejiao1a, WU Zhichun1a,ZHAO Ziyi1a,WANG Qiyuan2,SHEN Zhenxing3
(1a.School of Environmental and Municipal Engineering；1b.Key Laboratory of Northwest Water Resource，Environmental and Ecology，Ministry of Education，Xi’an University of Architecture and Technology，Xi’an 710055,China;2.Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China;3.Department of Environmental Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
Abstract:In order to determine the pollution characteristics of the chemical composition of fine particulate matter PM2.5 in construction dust in Xianyang City,the elemental components,water-soluble ions (WSIs) and polycyclic aromatic hydrocarbons (PAHs) of PM2.5 samples were respectively analyzed by X-ray fluorescence analyzer,ion chromatograph and gas chromatography-mass spectrometer.The sources of PM2.5 were explored and a health risk assessment was conducted.The results show that the total mass ratio of 19 kinds of elements in PM2.5 sample is 36.5%.The most abundant element is Ca with the highest mass ratio of 263 556 μg/g,while the element of Se is the lowest with the mass ratio of 16.5 μg/g.However,Se has the highest enrichment factor of 232.9.Among the 9 kinds of water-soluble ions,the mass concentrations of and Ca2+ are generally most abundant among the cation and anion ions,which accounted for 10.1% and 61.2% of the total WSIs,respectively.The PM2.5 sample shows obvious alkaline characteristics.The total mass ratio of polycyclic aromatic hydrocarbons which are dominated by multiple rings is 116.4 μg/g.PM2.5 mainly comes from exhaust emissions from building materials and construction equipment.Health risk assessment shows that children are more vulnerable than adults to heavy metal elements and polycyclic aromatic hydrocarbons,which should be prevented and controlled.
Keywords:construction dust;fine particulate matter;chemical composition;pollution characteristics;health risk assessment
中图分类号：X513 文献标志码：A
文章编号：1008-5548(2022)04-0079-11
DOI:10.13732/j.issn.1008-5548.2022.04.009
收稿日期： 2021-06-22， 修回日期：2022-04-06，在线出版时间：2022-06-22。
基金项目：陕西省重点研发计划项目，编号：2018-ZDXM3-01。
第一作者简介：张瑜洁(1997—)，女，硕士研究生，研究方向为城市扬尘组成特征及来源解析。E-mail：zhangyujie@xauat.edu.cn。
通信作者简介：张倩(1989—)，女，副教授，博士，硕士生导师，研究方向为大气污染的特征与来源解析。E-mail：zhangqian2018@xauat.edu.cn。
