Pollution Characteristics of Water-Soluble Ions in PM2.5 in Bozhou City
Based on manual sampling monitoring data from March 2022 to February 2023 in Bozhou city,the char-acteristics of eight water-soluble ions in PM2.5 was analyzed.During the study period,the concentration of PM2.5 was higher in winter.The average total concentration of water-soluble ions was(24.71±19.79)μg/m3,accounting for 48.5%of the mass concentration of PM2.5,which makes a high contribution to PM2.5.NO-3、SO2-4 and NH+4 were the main ions in PM2.5,accounting for 43.1%of PM2.5 The annual mean values of SOR and NOR are 0.47 and 0.27,respectively,indicating that there were secondary reactions in atmosphere,and the reaction ratio of SO2 was higher.The concentration of each ion component was higher in winter and lower in summer.PM2.5 in Bozhou city was slightly alkaline.NH4+exists mainly in the form of(NH4)2 SO4 and NH4 NO3.The N/S average value was 1.28,indicating that mobile source contributed more to PM2.5.The correlation analysis revealed that the potential sources of PM2.5 may be biomass combustion and dust.
water-soluble ionsPM2.5pollution characteristicsBozhou city
NETL
NSTL
万方数据
