南昌市环境空气PM_(2.5)化学组分的时空分布特征

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英文篇名：Temporal and Spatial Distribution Characteristics of Chemical Composition of Atmospheric PM_(2.5) in Nanchang 作者：徐义邦 ; 邓磊 ; 张美芳 ; 张吴 英文作者：Xu Yibang;Deng Lei;Zhang Meifang;Zhang Wu;Nanchang Environmental Monitoring Station; 关键词：PM2.5 ; 化学组分 ; 分布特征 ; 质量重构 ; 南昌 英文关键词：PM2.5;;chemical composition;;distribution characteristics;;mass closure;;Nanchang 中文刊名：HJGL 英文刊名：Journal of Environmental Management College of China 机构：南昌市环境监测站; 出版日期：2019-05-08 14:13 出版单位：中国环境管理干部学院学报 年：2019 期：v.29;No.114 语种：中文; 页：HJGL201902019 页数：4 CN：02 ISSN：13-1272/X 分类号：74-77

摘要

2015年在南昌市6个国控点分四个季度采集了大气PM_(2.5)样品,分析了其主要化学组分,并对PM_(2.5)质量浓度进行了重构。结果表明:南昌市PM_(2.5)的主要化学组分为SO_4~(2-)、OC、NO_3~-、NH_4~+和EC,占比具有明显的时空变化特征,硫酸盐在第二、三季度最大,硝酸盐在第一、四季度最大,SO_4~(2-)和NH_4~+在石化点位最高,NO_3~-在京东镇政府点位最高,OC和EC在省外办点位最高;重构后,南昌市PM_(2.5)以硫酸盐、有机物、地壳类物质为主,说明2015年南昌市扬尘和二次硫酸盐源类对PM_(2.5)的贡献可能是主要的。
        Atmospheric PM_(2.5)samples were collected at six national control points in Nanchang in four quarters in 2015.Major chemical components were analyzed,and PM_(2.5)mass concentration was reconstructed.The main chemical components of PM_(2.5)in Nanchang were SO_4~(2-),OC,NO_3~-,NH_4~+and EC.Significant temporal and spatial variation characteristics of mass concentration and proportion of PM_(2.5)were observed.Sulphate accounted for the largest proportion in the second and third quarters,while nitrate accounted for the largest proportion in the first and fourth quarters.SO_4~(2-)and NH_4~+were the highest at Shihua,NO_3~-was the highest at Jingdongzhenzhenfu,OC and EC were the highest at Shengwaiban.After reconstructed,PM_(2.5)was dominated by sulfate,organic matter and crust in Nanchang,indicating that the contribution of dust and secondary sulfate sources to PM_(2.5)may be the main one in 2015 in Nanchang.

引文

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