生态环境学报2025，Vol.34Issue(9)：1432-1441,10.DOI:10.16258/j.cnki.1674-5906.2025.09.010
北京地区9种典型绿化树种的BVOCs释放及二次污染生成潜势
Emission Characteristics of Biogenic Volatile Organic Compounds and the Formation Potentials of Secondary Pollutants from Nine Dominant Greening Trees in Beijing
摘要
Abstract
Greening vegetation provides various ecological benefits,but the biogenic volatile organic compounds(BVOCs)released by plants are the main precursors of ozone(O3)and secondary organic aerosols(SOA).It is crucial to investigate the BVOCs emission characteristics of typical plants in different regions to formulate more targeted air pollution prevention and control measures.Current studies on BVOCs emissions from greening species in Beijing have primarily focused on isoprene and monoterpenes,but few studies have investigated the emission characteristics of sesquiterpenes and other volatile organic compounds.Therefore,to understand the BVOCs emission characteristics and secondary pollutant formation potentials of the dominant greening trees in Beijing,this study collected samples and analyzed the BVOCs components of nine tree species in Beijing using the dynamic headspace method and gas chromatography/mass spectrometry from July to August 2022.We calculated the standardized BVOCs emission rates for each tree species and evaluated their potential for secondary pollutant formation.The results showed that the BVOCs emission rates varied significantly among the nine tree species.The total BVOCs emission rates of Platanus occidentalis,Populus tomentosa,and Salix matsudana were relatively high,reaching 26.3,22.5,and 22.2 µg·g-1·h-1,respectively.The VOCs emission rates of Quercus mongolica,Pinus tabuliformis,and Sophora japonica were 15.9,14.4,and 6.94 µg·g-1·h-1,respectively.In contrast,the BVOCs emission rates of Platycladus orientalis,Ginkgo biloba,and Fraxinus chinensis were relatively low at 3.36,1.73,and 1.35 µg·g-1·h-1,respectively.The composition of BVOCs emitted by different tree species varied significantly.Generally,coniferous species emitted monoterpenes at high rates,whereas broad-leaved species exhibited high emission rates of isoprene and oxygenated BVOCs.The highest emission rates of monoterpenes,isoprene and oxygenated BVOCs were Pinus tabuliformis(11.2 µg·g-1·h-1),Populus tomentosa(14.5 µg·g-1·h-1)and Platanus occidentalis(17.7 µg·g-1·h-1),respectively.The emission rates of sesquiterpenes,aromatic hydrocarbons,and alkanes were relatively low among the nine tree species.Tree species with high BVOCs emission rates make significant contributions to environmental secondary pollutants.Populus tomentosa,Salix matsudana,and Platanus occidentalis had a high potential for O3 formation,whereas Pinus tabuliformis had a high potential for SOA formation.These factors should be carefully considered in future urban-greening projects.This study has important implications for the selection of tree species for urban greening in northern China.关键词
挥发性有机物/释放速率/排放成分谱/二次污染物/臭氧生成潜势Key words
volatile organic compounds/emission rates/emission profile/secondary pollutants/ozone formation potential分类
资源环境引用本文复制引用
张蔷,李令军,鹿海峰,刘保献,李琪,王涵霖..北京地区9种典型绿化树种的BVOCs释放及二次污染生成潜势[J].生态环境学报,2025,34(9):1432-1441,10.基金项目
国家重点研发计划资助项目(2021YFC1809000) （2021YFC1809000）
