贵阳市夏、冬季大气中颗粒态和气态多环芳烃的污染特征

Characteristics of Polycyclic Aromatic Hydrocarbons in vapour and Particulate Phases in Atmospheric Collected between Autumn and Winter in Guiyang City

为了解贵阳市夏、冬季大气中颗粒态和气态多环芳烃的污染特征和环数分配,利用URG-3000K多功能空气污染物采样器于2020年6月~8月、2020年11月~2021年1月同时采集了颗粒态和气态大气样品,采用超高效液相色谱仪检测样品中16种多环芳烃颗粒态和气态的浓度。结果表明,PM_(2.5)的质量浓度和多环芳烃的含量变化具有相关性,均呈现出冬季高、夏季低的季节特征;气态PAHs在PAHs的百分比随着PAHs环数的增加而减少,颗粒态在PAHs的百分比随着PAHs环数增加而增加;冬季时气态中低环PAHs浓度比夏季高,颗粒态中高环PAHs浓度比夏季高。

In order to understand the pollution characteristics and loop distribution of particle and gaseous polycyclic aroma in Guiyang City,the number of rings of gaseous polycyclic aromatic hydrocarbons,using URG-3000 K multi-function air pollutant sampler from June to August 2020,2021 Granular and gaseous atmospheres were collected at the same time,and the concentration of 16 polycyclic aromatic hydrocarbon particles and gaseous gases were detected by ultra-efficient liquid chromatograph.The results show that the quality concentration of PM_(2.5)and the content change of polycyclic aromatic hydrocarbons have correlation,which exhibits a seasonal feature of high winter and low in summer;the percentage of gaseous PAHs in PAHS reduces the number of PAHs rings,granules The percentage of PAHS increases as the number of PAHs is increased;the low-ring PAHs concentration in the gaseous gaseous in winter is higher than the summer,the high ring PAHs concentration in the particle state is higher than the summer.