东莞市一次空气污染过程成因分析
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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 86 μg/m3.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%).
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 86 μg/m3.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%).
引文
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[2]司徒淑娉,吴洛林,周柳艺,等.佛山市PM2.5污染特征及诱发其高污染过程天气系统分析[J].环境监控与预警,2017,9(4):40-44.
[3]岳玎利,钟流举,张涛,等.珠三角地区大气PM2.5理化特性季节规律与成因[J].环境污染与防治,2015,37(4):1-6,12.
[4]谢宏琴,吴对林,张国斐,等.东莞城区环境空气细颗粒物PM2.5特征分析[J].环境工程,2014,32(6):65-70.
[5]YIN X,HUANG Z,ZHENG J,et al.Source contributions to PM2.5,in Guangdong province,China by numerical modeling:Results and implications[J].Atmospheric Research,2017,186:63-71.
[6]赵新锋,钟欣,胡嘉骢,等.珠海市PM2.5时空分布特征及其成因分析[J].环境监控与预警,2017,9(6):53-58.
[7]方灿芬.东莞市大气PM2.5污染特征及防治对策[J].中国环保产业,2013(2):9-12.
[8]张诗建,姬亚芹,朱振宇,等.机动车车速对道路交通扬尘排放特征的影响[J].环境污染与防治,2016,38(4):82-84,90.
[9]LIN H,LIU T,XIAO J,et al.Quantifying short-term and longterm health benefits of attaining ambient fine particulate pollution standardsin Guangzhou,China[J].Atmospheric Environment,2016,137:38-44.
[10]詹鹃铭,刘永红,林琳,等.2014年冬季珠三角区域典型城市PM2.5污染时空关联特征[J].环境科学研究,2017,30(1):110-120.
[11]林小平,巫楚,曾树森,等.河源市城区春季PM2.5典型污染过程案例分析[J].环境监控与预警,2017,9(4):49-54,66.
[12]邓术兴,叶芝祥,欧阳峰,等.南充市城区冬季大气细颗粒物化学组成特征及来源解析[J].环境工程,2018,36(6):99-103.
[13]LAN Z,ZHANG B,HUANG X,et al.Source apportionment of PM2.5light extinction in an urban atmosphere in China[J].Journal of Environmental Sciences,2018,63(1):277-284.
[14]杨孝文,周颖,程水源,等.北京冬季一次重污染过程的污染特征及成因分析[J].中国环境科学,2016,36(3):679-686.