摘要
为研究硫酸盐(SO_(4)^(2-))对二氧化硫(SO_(2))长期减少的反应,本研究利用四年在线小时分辨率数据对2019—2022年太原市冬季SO_(4)^(2-)进行研究。结果表明,研究期间SO_(2)质量浓度从32.60μg/m^(3)降低到19.33μg/m^(3),SO_(4)^(2-)质量浓度从13.87μg/m^(3)降低到2.81μg/m^(3),SO_(4)^(2-)在PM_(2.5)中占比从16.4%降低到5.8%,SOR从0.3显著降低至0.13。结合条件概率函数(CPF)、浓度加权轨迹(CWT)模型以及后向轨迹分析发现,本地贡献和西南区域输送是2019年SO_(4)^(2-)的主要来源,而2020—2022年SO_(4)^(2-)主要来自于西南区域输送。
In order to study the reaction of sulfate(SO_(4)^(2-))to the long-term reduction of sulfur dioxide(SO_(2)).In this study,4-year online hourly resolution data were used to study SO_(4)^(2-)from 2019 to 2022 during winter in Taiyuan.The results showed that SO_(2)decreased from 32.60μg/m^(3)to 19.33μg/m^(3),SO_(4)^(2-)decreased from 13.87μg/m^(3)to 2.81μg/m^(3),the proportion of SO_(4)^(2-)in PM_(2.5)decreased from 16.4%to 5.8%,and SOR decreased significantly from 0.3 to 0.13.Combined with conditional probability function(CPF),concentration weighted trajectory(CWT)model and backward trajectory analysis,local contribution and southwest regional transport were the main sources of SO_(4)^(2-)in 2019,while SO_(4)^(2-)mainly came from southwest regional transport in 2020-2022.
作者
温晓娅
崔阳
何秋生
郭利利
Wen Xiaoya;Cui Yang;He Qiusheng;Guo Lili(School of Environmental Science and Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)
出处
《山西化工》
CAS
2024年第9期230-233,共4页
Shanxi Chemical Industry
