Time Variation and Source Analysis of Precipitation Chemical Characteristics in Taiyuan City
Based on the atmospheric wet deposition(rain,snow)samples in Taiyuan from 2011 to 2021,the variation characteristics of chemical components in precipitation during the period of decreasing atmospheric pollutant concentration were analyzed.The results show that there is a negative correlation between the pH value of precipitation and rainfall,and the frequency of acid rain has been decreasing year by year over the past 10 years.Ca2+,NH4+,SO42-,and NO3-are the most abundant ions.SO2 remains the main cause of acidity in precipitation,but the contribution of NOx to acid rain has been increasing year by year.The continuous decrease in coal consumption is the main reason for the decrease in SO42-concentration,while the increase in NO3-concentration is related to the increase in motor vehicle ownership.
NETL
NSTL
万方数据
