秋收季大气PM_(2.5)颗粒物二次粒子污染浓度垂直变化特征研究  

Research on Vertical Variation Characteristics of Secondary Particle Pollution Concentration of Atmospheric PM_(2.5)Particles During Autumn Harvest Season

作　　者：王挺 王丽 胡栋娇 陈衍 Wang Ting;Wang Li;Hu Dongjiao;Chen Yan(Shaoxing Keqiao District Environmental Protection Monitoring Station,Shaoxing 312000,China)

机构地区：[1]绍兴市柯桥区环境保护监测站,浙江绍兴312000

出　　处：《环境科学与管理》2025年第4期126-130,共5页Environmental Science and Management

摘　　要：为研究秋收季时段,大气PM_(2.5)颗粒物二次粒子污染浓度垂直变化特征,设计实验结合大气采样与成分分析。选择绍兴为研究区域,秋收季作为实验时段,对比其他季节,在水平和垂直两个维度上设置测点,通过对大气颗粒物的采样、分析与计算,得出秋收季在高度为2.0 m测点位置上的硫酸铵、亚硫酸铵和硝酸铵二次粒子污染物浓度分别为1.8 mg/L、1.4 mg/L和0.16 mg/L;高度为15.0 m测点位置上三种二次粒子污染物浓度分别为0.5 mg/L、0.8 mg/L和0.08 mg/L,垂直变化梯度为0.1 mg/L。与普通季节时段相比,在秋收季大气PM_(2.5)颗粒物二次粒子污染浓度更高,垂直变化梯度更小。To study the vertical variation characteristics of secondary particle pollution concentration of atmospheric PM_(2.5)particles during the autumn harvest season,an experiment was designed to combine atmospheric sampling and component analysis.Shaoxing was selected as the research area,and the autumn harvest season was used as the experimental period.Compared with other seasons,measuring points were set up in both horizontal and vertical dimensions.Through sampling,analysis,and calculation of atmospheric particulate matter,the concentrations of ammonium sulfate,ammonium sulfite,and ammonium nitrate secondary particle pollutants at a height of 2.0 m during the autumn harvest season were found to be 1.8 mg/L,1.4 mg/L,and 0.16 mg/L,respectively.The concentrations of three types of secondary particle pollutants at the measuring point with a height of 15.0 m are 0.5 mg/L,0.8 mg/L,and 0.08 mg/L,respectively,with a vertical gradient of 0.1 mg/L.It can be concluded that compared with the normal seasonal period,the concentration of PM_(2.5)particulate matter secondary particle pollution in the autumn harvest season is higher,and the vertical gradient is smaller.

关 键 词：秋收季节 大气PM_(2.5)颗粒物 二次粒子污染 污染浓度 垂直变化特征 

分 类 号：X513[环境科学与工程—环境工程]