广州市黄埔区典型区域环境空气中VOCs污染特征及来源解析

Characteristics and Source Analysis of VOCs Pollution in the Air of Typical Areas in Huangpu District,Guangzhou City

基于广州市黄埔区大气预警监测系统挥发性有机物(VOCs)在线监测数据,分析了该典型区域环境空气VOCs整体浓度水平和组分特征。利用正定矩阵因子分解(PMF)模型开展源解析研究。结果表明,该区域环境空气中VOCs日平均体积分数为42.31×10^(-9),浓度水平与周边城市相差不大,构成组分有区域差异性;优势组分为卤代烃,优势物种依次为正辛烷、甲硫醚、二氯丙烯等,体现了该区域产业结构特色和生产工艺的复杂性;PMF分析表面工业排放源贡献为33.1%,溶剂使用挥发源贡献为19.5%,是制定该区域管控措施需要重点考虑方面。

Based on the online monitoring data of volatile organic compounds(VOCs)in the atmospheric early warning monitoring system of Huangpu District,Guangzhou,the overall concentration level and component characteristics of VOCs in the ambient air of this typical area were analyzed.A source apportionment study was conducted using a positive definite matrix factorization(PMF)model.The results showed that the daily average volume fraction of VOCs in the ambient air of this area was 42.31×10^(-9),the concentration level is not significantly different from that of surrounding cities,and the composition has regional differences;The dominant components are halogenated hydrocarbons,and the dominant species are n-octane,methyl sulfide,dichloropropylene,etc.,reflecting the characteristics of the industrial structure and the complexity of production processes in the region;PMF analysis shows that the contribution of surface industrial emission sources is 33.1%,and the contribution of volatile sources from solvent use is 19.5%,which is a key consideration for formulating control measures in this region.