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宝鸡市春季PM2.5中元素的污染特征及来源解析
Pollution Characteristics and Source Analysis of PM2.5 Elements during Spring in Baoji City

DOI: 10.12677/AEP.2021.115117, PP. 980-986

Keywords: 元素，宝鸡市，春季，来源
Element, Baoji, Spring, Source

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Abstract:

为了解宝鸡市春季PM2.5中元素的污染特征及来源，于宝鸡文理学院明理楼楼顶进行为期一个月的采样，对相关数据进行污染特征分析，并运用主成分分析法对春季元素污染进行来源解析。污染特征分析结果表明，宝鸡市春季元素平均浓度为42.5 μg/m3，其中Al、Ca、Mg和Na四种元素约占总元素的87.5%，结合风速条件发现春季元素污染受扬尘影响较大；K、Ti、Mn、Fe、Cu和Zn随着污染加重，在总元素中的占比随之加大；PM2.5中大部分元素浓度的昼夜变化均表现为昼 > 夜，仅Zn和Pb两种元素表现为夜 >昼，所有元素中Zn的变化幅度最大，约为58%，As的变化幅度最小，约为5%。主成分分析结果表明，宝鸡市春季PM2.5中元素主要来源于工业和交通的混合源、扬尘和燃烧源。
In order to understand the pollution characteristics and sources of PM2.5 elements in Baoji city in spring, samples were taken from the roof of Mingli Building of Baoji University of Arts and Sciences for a period of one month, the pollution characteristics of relevant data were analyzed, and the source of element pollution in spring was analyzed by principal component analysis. The results of pollution characteristics analysis showed that the average concentration of elements in Baoji city in spring was 42.5 μg/m3, in which Al, Ca, Mg and Na accounted for the largest proportion, about 87.5% of the total elements. The diurnal variation of most elements in PM2.5 is day > night, but only Zn and Pb are night > day. Among all elements, the variation range of Zn is the largest, about 58%, and that of As is the smallest, about 5%. The results of principal component analysis showed that PM2.5 elements in Baoji city in spring mainly came from the mixed sources of industry and traffic, dust and combustion.

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