珠海市2017—2018大气PM_(2.5)污染成份特征及金属元素来源解析  

Pollution characteristics and source of metal elements in atmospheric PM_(2.5) in Zhuhai City,2017—2018

作　　者：吴和岩[1] 黄利群[1] 宁婷 肖伟华[1] 张艳[1] WU He-yan;HUANG Li-qun;NING Ting;XIAO Wei-hua;ZHANG Yan(Center for Disease Control and Prevention of Zhuhai,Zhuhai,Guangdong 519000,China)

机构地区：[1]珠海市疾病预防控制中心学校与环境卫生所,广东519000

出　　处：《现代预防医学》2022年第1期27-31,共5页Modern Preventive Medicine

基　　金：广东省医学科研基金资助(A2017390)。

摘　　要：目的分析珠海市大气PM_(2.5)的污染特征及其中金属元素来源,为更好地控制大气PM_(2.5)中金属元素污染提供科学依据。方法2017—2018年在珠海市香洲区、斗门区和金湾区分别设置监测点,每月定期采集大气PM_(2.5),共取得504份样品,通过ICP-MS测定PM_(2.5)中锑(Sb)、铝(Al)、砷(As)、铍(Be)、镉(Cd)、铬(Cr)、汞(Hg)、铅(Pb)、锰(Mn)、镍(Ni)、硒(Se)、铊(Tl)等12种金属元素含量,并通过因子分析法进一步分析各元素来源。结果珠海市2017—2018年大气PM_(2.5)质量浓度平均为38.36μg/m3,12种金属元素年均质量浓度总和为100.94 ng/m3,占PM_(2.5)年均质量浓度的0.27%,金属元素平均质量浓度顺序为Al>Pb>Mn>As>Ni>Se>Sb>Cr>Cd>Tl>Hg>Be。因子分析结果显示,燃煤排放、金属冶炼工业尘、机动车尾气排放以及船舶源的排放是珠海市大气PM_(2.5)中金属的主要污染来源。结论珠海市大气PM_(2.5)中金属元素污染来源主要为人为污染,在制定相关减排措施控制污染时,应充分考虑不同污染物来源。Objective To analyze the pollution characteristics of PM_(2.5)and source and the proportion of metal elements in atmospheric PM_(2.5)in Zhuhai City,in order to provide scientific basis for pollution control for PM_(2.5)and metal elements.Methods A total of 504 PM_(2.5)samples were collected monthly in 2017-2018 from Xiangzhou District,Doumen District and Jinwan District of Zhuhai City,and contents of Sb,Al,As,Be,Cd,Cr,Hg,Pb,Mn,Ni,Se,Tl were analysed by ICP-MS.The source of metal elements was explained by factor analysis.Results The annual average concentration of PM_(2.5)was 38.36μg/m3 in Zhuhai City from 2017 to 2018.The annual total average concentration of selected 12 metals was 100.94 ng/m3,accounting for 0.27%of PM_(2.5)mass concentration.The average mass concentrations of metal elements in PM_(2.5)ranked as the following order,Al>Pb>Mn>As>Ni>Se>Sb>Cr>Cd>Tl>Hg>Be.The results of factor analysis showed that the main pollution sources of metal elements in atmospheric PM_(2.5)in Zhuhai City were coal combustion,metal smelting industry,motor vehicle exhaust and ship emissions.Conclusion The pollution sources of metal elements in atmospheric PM_(2.5)in Zhuhai City are mainly man-made pollution.Different pollution sources should be fully considered in order to formulate some measures to control pollution.

关 键 词：大气污染 PM_(2.5) 金属元素 来源 

分 类 号：R122.1[医药卫生—环境卫生学]