摘要
为了解成都市青白江区环境空气质量特征以及环境空气污染物的变化情况,基于2017~2021年成都市青白江区环境空气质量监测数据,采用环境空气质量综合指数评价法和Spearman秩相关系数法,分析了青白江区环境空气质量情况,探讨了青白江区2017~2021年环境空气多尺度变化特征以及污染变化趋势。结果表明:1)2017~2021年青白江区综合指数由4.65下降到3.66,空气质量总体呈逐年好转趋势。2)首要污染物以PM_(2.5)和O_(3-8H)为主,PM_(2.5)污染天占比为31.0%~38.6%,主要集中在春冬时节,尤其是11月~翌年2月,O_(3-8H)污染天占比为38.9%~44.7%,主要集中在春夏时节,主要集中在3月~9月。3)污染物SO_(2)、NO_(2)和CO浓度值,以及综合指数有明显下降,污染物PM_(10)、PM_(2.5)、O_(3-8H)浓度有所下降,但不具有显著性。即自2017年以来,青白江区空气质量虽呈改善趋势,但颗粒物和O_(3-8H)却未有显著改善趋势,作为首要污染物的PM_(2.5)、O_(3-8H)是制约青白江区进一步提升空气质量的关键因子,PM_(2.5)和O_(3-8H)协同治理仍就任重道远,需加大治理力度。
Aiming at understanding the characteristics of ambient air quality and the changes of ambient air pollutants in Qingbaijiang District of Chengdu,based on the monitoring data of ambient air quality in Qingbaijiang District of Chengdu from 2017 to 2021,the ambient air quality was analyzed by using the comprehensive index assessment method of ambient air quality and Spearman rank correlation coefficient method.Meanwhile the multi-scale change characteristics of ambient air and the trend of pollution change in Qingbaijiang District from 2017 to 2021 were discussed.The results showed:1)The comprehensive index of Qingbaijiang from 4.65 to 3.66.It indicated the air quality of Qingbaijiang has improved.2)PM_(2.5) and O_(3-8H) were the daily primary pollutant in Qingbaijiang.The proportion of PM_(2.5) pollution days was 31.0%~38.6%,mainly concentrated in spring and winter,especially from the November to the following February.O_(3-8H) accounted for 38.9%~44.7% of the primary pollutants,mainly concentrated in spring and summer,mainly occurred in March to September.3)The concentration of SO_(2),NO_(2) and CO has decreased significantly.The concentration of PM_(10),PM_(2.5) and O_(3-8H) has also decreased,however the decreasing was not significantly.In conclusion,the air quality of Qingbaijiang has shown an improvement trend,however,particulate matter and O_(3-8H) have not shown a significant improvement trend.PM_(2.5) and O_(3-8H) are the key primary pollutants restricting the further improvement of air quality in Qingbaijiang.It’s important for co-governance of PM_(2.5) and O_(3-8H) to improve the air quality of Qingbaijiang.
作者
黄立秋
李杏桃
龙武林
文志宁
范哲铭
HUANG Liqiu;LI Xingtao;LONG Wulin;WEN Zhining;FAN Zheming(Qingbaijiang Environmental Monitoring Station,Chengdu 610300,China;College of Chemistry,Sichuan University,Chengdu 610065,China)
出处
《中国沼气》
CAS
2023年第4期65-70,共6页
China Biogas
基金
国家自然科学基金(21575094)。
关键词
环境空气
空气质量评价
数理统计
Spearman秩相关系数
变化趋势
atmospheric environment
air quality evaluation
mathematical statistics
Spearman rank correlation coefficient
variation trend
