“十三五”期间炎陵县环境空气质量变化特征分析

Analysis of Characteristics of Environmental Air Quality Changes in Yanling County during the 13th Five Year Plan Period

基于“十三五”期间(2016-2020年)炎陵县6种环境空气污染物监测数据,分析结果表明:炎陵县SO_(2)、NO_(2)、PM_(10)、PM_(2.5)、CO、O_(3)年均浓度均达到二级标准,其中SO_(2)、NO_(2)、CO年均浓度达到一级标准。PM_(10)、PM_(2.5)年均浓度呈显著下降趋势,SO_(2)、O_(3)年均浓度呈不显著下降趋势,但NO_(2)、CO年均浓度呈显著上升趋势;炎陵县环境空气质量优良率呈明显上升趋势。炎陵县6种大气污染物日均浓度表现出明显的季节性特征,PM_(2.5)、PM_(10)、NO_(2)、SO_(2)日均浓度呈现“U”型变化规律;CO日均浓度呈现无规律变化;O_(3)质量浓度呈波浪形变化。

Based on the monitoring data of six environmental air pollutants in Yanling County during the 13th Five Year Plan period(2016-2020),the annual and monthly variation characteristics and influencing factors of various pollutants in Yanling County were analyzed.The results showed that during the 13th Five Year Plan period,the annual average concentrations of SO_(2),NO_(2),PM_(10),PM_(2.5),CO and O_(3) in Yanling County reached the second level standard,with SO_(2),NO_(2) and CO reaching the first level standard.The annual average concentrations of PM_(10) and PM_(2.5) showed a significant downward trend,while the annual average concentrations of SO_(2) and O_(3) showed an insignificant downward trend,while the annual average concentrations of NO_(2) and CO showed a significant upward trend.The excellent rate of ambient air quality in Yanling County was showing a significant upward trend.The daily average concentration of atmospheric pollutants in Yanling County showed obvious seasonal characteristics.Among the six pollutants,the daily average concentrations of PM_(2.5),PM_(10),NO_(2) and SO_(2) showed a“U”shaped variation pattern,with the highest concentration in winter and the lowest in summer.The daily average concentration of CO showed irregular changes.The mass concentration of O_(3) varied in a wavy pattern,with varying highs and lows.