中文关键词细颗粒物来源解析受体模型重污染秋冬季 英文关键词fine particulate mattersource apportionmentreceptor modelheavy pollutionautumn and winter

作者	单位	E-mail
陈楚	南京大学大气科学学院, 南京 210023	mg1728036@smail.nju.edu.cn
王体健	南京大学大气科学学院, 南京 210023	tjwang@nju.edu.cn
李源昊	濮阳市环境监测站, 濮阳 457000
马红磊	濮阳市环境监测站, 濮阳 457000
陈璞珑	南京大学大气科学学院, 南京 210023
王德羿	南京大学大气科学学院, 南京 210023
张元勋	中国科学院大学资源与环境学院, 北京 100049
乔琦	中国环境科学研究院, 北京 100012
李光明	濮阳市环境监测站, 濮阳 457000
王文红	濮阳市环境监测站, 濮阳 457000

中文摘要 濮阳市作为京津冀周边地区大气污染传输通道城市之一，秋冬季重污染天气频发，空气污染问题严峻.为了研究濮阳市秋冬季大气细颗粒物污染特征及其主要来源，于2017年10月15日至2018年1月13日在濮阳市3个国控点对PM_2.5进行了手工膜采样与化学组分分析，并结合PMF受体模型，开展了细颗粒物来源解析研究.结果表明，濮阳市2017年秋冬季PM_2.5平均质量浓度为94.16 μg·m^-3，濮水河管理处的污染状况最严重，进入采暖季后3站点均表现为重度及严重污染事件频发，轻度污染发生频率降低，重污染发生时NO₂与CO浓度升高明显.PM_2.5中的主要组分为水溶性离子（52.33%）、碳质组分（25.32%）和地壳元素（0.08%），NO₃^-的含量高而SO₄^2-的浓度水平较低.重污染发生时，PM_2.5中水溶性离子、OC、EC和K浓度都出现了明显的升高，而地壳元素浓度降低.采样期间濮阳市的硫氮转化率水平较高，大气氧化性较强，硫氮转化促进了重污染的发生.濮阳市2017年NO_x、CO和VOCs排放量较高，来源解析结果表明，濮阳市秋冬季PM_2.5主要来源分别为二次无机盐（37%）、工业源（16%）、二次有机气溶胶SOA （14%）、生物质燃烧源（12%）、移动源（9%）、燃煤源（7%）和扬尘源（4%）.可见，二次转化在濮阳重污染的形成过程中起到重要作用，要减轻大气细颗粒物污染，需要重点控制工业源、生物质燃烧、移动源和民用散煤燃烧的排放. 英文摘要 As one of the air pollution transmission channels around the beijing-Tianjin-Hebei region, Puyang frequently suffer from severe airpollution in autumn and winter. In order to study the characteristics and main sources of fine particulate matter during these periods, manual membrane sampling of PM_2.5 was conducted at three national control sites from October 15, 2017, to January 13, 2018. Chemical composition analysis was conducted and, combined with a PMF receptor model, source analysis of the fine particles was also undertaken. The results show that the average mass concentration of PM_2.5 in Puyang was 94.16 μg·m^-3 in the autumn and winter of 2017, and Pushuihe station was the most polluted site. During the heating season, the three control stations all recorded the frequent occurrence of severe and serious pollution events, while the frequency of mild pollution events decreased. When heavy pollution events occurred, the concentrations of NO₂ and CO increased significantly. The main components of PM_2.5 were water-soluble ions (52.33%), OCEC (25.32%), and crustal elements (0.08%). The concentrations of NO₃^- were high while the concentrations of SO₄^2- were low. When heavy pollution occurred, the concentrations of water-soluble ions, OC, EC, and K in PM_2.5 increased significantly, while the concentrations of crustal elements decreased. During the sampling period, the conversion ratios of sulfur and nitrogen in Puyang were high and atmospheric oxidation was strong. The transformation of sulfur and nitrogen promoted the occurrence of heavy pollution. Emissions of NO_x, CO, and VOCs were higher in Puyang in 2017, and the source apportionment results showed that the main sources of PM_2.5 in autumn and winter were secondary inorganic salts (37%), industrial sources (16%), secondary organic aerosol (SOA, 14%), biomass combustion (12%), mobile sources (9%), coal burning (7%), and dust (4%). Secondary transformation played an important role in the development of heavy pollution events in Puyang. It is necessary to focus on the control of emissions from industrial sources, biomass combustion, moving source, and civil coal combustion.

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