摘要
基于东莞市大气复合污染超级监测站的监测数据,选取2017年12月一次典型空气污染过程,对污染期间气象要素、大气颗粒物组分特征和污染物来源进行综合研究。结果表明,在污染期间,首要污染物为PM_(2.5),日均值为86μg/m3,其主要化学组分依次是OC、NO_3^-和SO_4^(2-),分别占PM_(2.5)的19.7%,16.1%和14.9%;在不利的气象条件下,本地污染排放和外源输入的一次污染物快速生成二次有机物、硝酸盐和硫酸盐,是造成该次空气污染的主要原因; PM_(2.5)污染主要来源为机动车尾气(27.7%)及二次无机源(19.0%)。
Based on the data of Dongguan Atmospheric Monitoring Supersite,a typical air pollution process in Dongguan during December in 2017 have been comprehensively studied including meteorological data,chemical composition of air particles and pollution source.The results showed that the primary pollutant was PM 2.5,and its daily mean mass concentration was 86μg/m^3.The main chemical components of PM 2.5 were OC,NO^3-and SO 4^2-,accounting for 19.7%,16.1%and 14.9%,respectively.Under the unfavorable weather conditions,secondary organic aerosols,nitrates and sulfates were rapidly produced by primary pollutants from local emission and regional transport,and that was the main causes of this air pollution.The main source of PM 2.5 pollution were vehicle exhaust(27.7%)and secondary inorganic aerosols(19.0%).
作者
郭深深
李美敏
方洪波
岳玎利
梁家权
林满
GUO Shen-shen;LI Mei-min;FANG Hong-bo;YUE Ding-li;LIANG Jia-quan;LIN Man(Dongguan Environmental Monitoring Center,Dongguan,Guangdong 523000,China;Guangdong Environmental Monitoring Center,State Environmental Protection Key Laboratory of Regional Air Quality Monitoring,Guangzhou,Guangdong 510308,China;One Point Environmental Science & Technology Co. Ltd.,Guangzhou,Guangdong 510000,China)
出处
《环境监控与预警》
2019年第1期17-20,共4页
Environmental Monitoring and Forewarning
