一场台风雨化学成分特征及空气质量状况分析研究——以台风“山竹”为例

Characteristics of Chemical Composition and Conditions of Air Quality in Typhoon——A Case Study of“Mangosteen”Typhoon

为了解一场台风雨的化学成分变化特征以及伴随台风雨过程中空气质量状况变化,以台风“山竹”为例进行实验研究。结果表明:台风“山竹”没有产生酸雨,pH值、电导率、离子组分基本上都与降雨量之间呈负相关,阴阳离子浓度大小依次为:Cl^->Ca^2+>NO3^->SO4^2->NH^+4>Na^+>K^+>Mg^2+>F^-,在台风“山竹”期间,降雨化学成分以及空气中SO2、NO2、TSP、PM10、PM2.5浓度随时间变化特征基本上一致,即在初期最高,中期基本是逐渐下降,后期有所上升,说明降雨化学成分与空气污染物有密切关系。

In order to understand the variation characteristics of chemical composition in typhoon and the changes in status of air quality with rain of typhoon,this study took typhoo“Mangosteen”as an example to experiment and study.The results indicated that the rain wasn t acid rain from typhoon“Mangosteen”.PH value,conductivity and ion components were negative correlation basically with rainfall amount.The concentrations of anion and cation were Cl^->Ca^2+>NO3^->SO4^2->NH4^+>Na^+>K^+>Mg^2+>F^-,during the typhoon“Mangosteen”.The variation characteristics of chemical composition in rainfall and the concentrations of SO2,NO2,TSP,PM10 and PM2.5 in the air were consistent with time basically,they were the highest at the beginning namely,and they declined basically and gradually in the medium term,and they rose in later stage.It showed that the chemical composition in rainfall was related to air pollutants closely.