Variation and influencing factors of iron solubility in fine particulate matter in Hangzhou
WANG Yue1, ZHANG Yin-xiao1,2, QI Bing3,4, ZHU Yan-hong1, YUAN Qi5, LI Wei-jun1
1. Department of Atmospheric Science, School of Earth Sciences, Zhejiang University, Hangzhou 310058, China; 2. Flight College, Binzhou University, Binzhou 256600, China; 3. Hangzhou Meteorological Bureau, Hangzhou 310051, China; 4. Zhejiang Lin'an Atmospheric Background National Observation and Research Station, Hangzhou 311307, China; 5. Department of Environmental Science, School of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
Abstract:In this study, PM2.5 samples were collected during polluted and non-polluted days in Hangzhou.The mass concentrations of soluble iron (FeS) and the Fe solubility (Fes%) in the PM2.5were analyzed. The results show that the total Fe (FeT) concentration was 629±296ng m-3 with the range of 150~1167ng m-3, soluble iron concentration was 51.4±30.5ng m-3 with the range of 4.2~90.5ng m-3, and the Fe solubilityis 7.8±3.5% with the range of 1.5~12.9%. The concentrations of PM2.5, total Fe and soluble iron in polluted days were significantly higher than those in non-polluted days. Fe solubility was 9.3% in polluted days, much higher than 5.1% in non-polluted days. This study found that the difference of Fe solubility is mainly related to the source of Fe and the process of atmospheric acidification. Fe in polluted days is mainly affected by anthropogenic sources such as traffic and industrial emissions, and the atmospheric acidification in polluted days is stronger.
王玥, 张银晓, 齐冰, 朱艳红, 袁琦, 李卫军. 杭州市大气细颗粒物中铁溶解度的变化特征及影响因素[J]. 中国环境科学, 2023, 43(1): 115-121.
WANG Yue, ZHANG Yin-xiao, QI Bing, ZHU Yan-hong, YUAN Qi, LI Wei-jun. Variation and influencing factors of iron solubility in fine particulate matter in Hangzhou. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(1): 115-121.
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