北京市春节前和春节期间非甲烷烃污染特征及其来源解析  

Characterization of Non-Methane Hydrocarbon Pollution in Beijing before and during the Spring Festival and Analysis of Its Sources

作　　者：佟胜睿[1] 徐言勇 李方杰 张海亮 葛茂发[1,2] TONG Shengrui;XU Yanyong;LI Fangjie;ZHANG Hailiang;GE Maofa(Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shenyang Research Institute of Non-Ferrous Metals,Shenyang 110141,China)

机构地区：[1]中国科学院化学研究所,北京100190 [2]中国科学院大学,北京100049 [3]沈阳有色金属研究院有限公司,辽宁沈阳110141

出　　处：《环境科学研究》2024年第11期2453-2465,共13页Research of Environmental Sciences

基　　金：国家自然科学基金项目(No.42022039)。

摘　　要：为探究春节前和春节期间北京市非甲烷烃(NMHCs)的来源和转化过程,基于2021年2月2-16日北京市空气质量监测数据、气象数据和非甲烷烃的在线分析结果开展了相关研究。结果表明:①北京市春节前(2月2日00:00-2月11日00:00)和春节期间(2月11日00:00-2月16日00:00)NMHCs体积分数有明显差异,其中,春节前NMHCs平均体积分数为25.43×10^(-9)±11.38×10^(-9),而春节期间为32.37×10^(-9)±12.43×10^(-9),增幅近27.3%。②利用正定矩阵因子分解(PMF)模型分析了春节前和春节期间的NMHCs来源差异,其中,汽油、柴油车辆排放源贡献率由春节前的37.2%降至春节期间的13.9%,溶剂使用和燃烧排放源的贡献率从春节前的18.4%升至春节期间的55.7%。③结合潜在源贡献因子分析(PSCF)和浓度权重轨迹(CWT)方法发现,春节期间NMHCs来源主要与北京市周边地区的烟花爆竹燃放、燃煤等排放的区域传输有关。④NMHCs的臭氧生成潜势(OFP)和二次有机气溶胶生成潜势(SOAP)表明,烯烃和芳香烃分别对观测期间O_(3)和二次气溶胶的生成具有重要贡献。研究表明,在开展京津冀地区污染联防联控过程中,对燃烧源排放的控制是有效缓解北京市春节期间空气污染问题的重要手段。In order to investigate the sources and transformations of non-methane hydrocarbon compounds(NMHCs)in Beijing before and during the Spring Festival,a study was conducted using air quality monitoring data,meteorological data,and online analysis of NMHCs nd th from February 2 to 162021.The results showed that:(1)A significant difference was observed in NMHC concentrations before(00:00 nd February 2-00:00 February 11th)th and during(00:00 February 11-00:00 February 16th)the Spring Festival.The average concentration of NMHCs before the Spring Festival was 25.43×10^(-9)±11.38×10^(-9),while the average concentration during the Spring Festival was 32.37×10^(-9)±12.43×10^(-9),representing an increase of nearly 27.3%.(2)The Positive Definite Matrix Factorization(PMF)model was used to analyze the differences in the sources of NMHCs between the pre-and Spring Festival periods.The contribution of gasoline and diesel vehicle emissions decreased from 37.2%before the Spring Festival to 13.9%during the Spring Festival,while contribution from solvent use and combustion sources increased from 18.4%before the Spring Festival to 55.7%during the Spring Festival.(3)The combination of the Potential Source Contribution Function(PSCF)and Concentration Weighted Trajectory(CWT)methods determined that changes in NMHC sources were primarily related to regional transport of emission from fireworks,firecrackers,coal,and other sources in the surrounding areas of Beijing.During the Spring Festival the NMHCs sources mainly came from regional transport of fireworks and coal combustion emissions.(4)The Ozone Formation Potential(OFP)and Secondary Organic Aerosol Potential(SOAP)methods showed that alkenes and aromatic hydrocarbons contributed significantly to the formation of O_(3) and secondary particulate matter,respectively,during the observation period.This study highlights that controlling combustion source emissions is essential for effectively mitigating air pollution during the Spring Festival,as part of the joint pollution prevention a

关 键 词：非甲烷烃(NMHCs) 源解析 潜在源贡献因子分析(PSCF) 臭氧生成潜势(OFP) 二次有机气溶胶生成潜势(SOAP) 

分 类 号：X511[环境科学与工程—环境工程]