| 成都市西南郊区夏秋季PM_(2.5)碳组分化学特征 |
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| 引用本文： | 张菊,林瑜,乔玉红,杨怀金,叶芝祥.成都市西南郊区夏秋季PM_(2.5)碳组分化学特征[J].环境工程,2017,35(10):100-104. |
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| 作者姓名： | 张菊 林瑜 乔玉红 杨怀金 叶芝祥 |
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| 作者单位： | 1. 成都信息工程大学资源环境学院,成都610225;大气环境模拟与污染控制四川省高校重点实验室,成都610225;2. 成都信息工程大学资源环境学院,成都,610225 |
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| 基金项目： | 四川省教育厅项目，成都信息工程大学校选项目，大气环境模拟与污染控制四川省高校重点实验室开放课题 |
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| 摘 要： | 为研究成都市西南郊区PM_(2.5)中碳组分浓度的季节变化及污染特征,分析了PM_(2.5)中有机碳(OC)、元素碳(EC)的含量。结果表明:颗粒物PM_(2.5)、总碳(TC)、有机碳(OC)月平均质量浓度夏季比秋季略高;OC/EC平均比值在夏季和秋季分别为2.47和2.18,说明均有二次有机碳(SOC)的生成;OC和EC在夏秋季均有较强的相关性(夏季R~2为0.77,秋季R~2为0.79);SOC在夏、秋季的月平均浓度分别为4.02,2.76μg/m~3;降雨在一定程度上降低了PM_(2.5)的浓度。
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| 关 键 词： | 成都 PM2.5 有机碳 元素碳 降雨 |
CHARACTER OF CARBONACEOUS AEROSOL IN PM2.5 DURING SUMMER-AUTUMN PERIOD IN SOUTHWEST SUBURB OF CHENGDU |
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| ZHANG Ju,LIN Yu,QIAO Yu-hong,YANG Huai-jin,YE Zhi-xiang.CHARACTER OF CARBONACEOUS AEROSOL IN PM2.5 DURING SUMMER-AUTUMN PERIOD IN SOUTHWEST SUBURB OF CHENGDU[J].Environmental Engineering,2017,35(10):100-104. |
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| Authors: | ZHANG Ju LIN Yu QIAO Yu-hong YANG Huai-jin YE Zhi-xiang |
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| Abstract: | Aiming at studying the concentration and character of carbonaceous aerosol in PM2.5 during summer-autumn period in southwest suburb of Chengdu,30 samples from Jun 1 st to 30 th in 2015 in Summer and 28 samples from Sep 1 st to 28 th in Autumn were collected.Concentrations of organic carbon(OC) and elemental carbon(EC) in PM2.5 were analyzed.The results showed that the average mass concentration of PM2.5.total carbon and organic carbon in Summer were more higher than that in Autumn.The monthly average ratios of OC/EC in Summer and Autumn were 2.47 and 2.18,respectively,impling that there existed secondary organic carbon.Strong correlation between OC and EC were found (R2 =0.77 in Summer and R2 =0.79 in Autumn).It was estimated by the method of OC/EC that the monthly average mass concentrations of secondary organic carbon were 4.02,2.76 μg/m3 in summer and autumn.It was also found that precipitation could minimize the mass concentration of PM2.5,whose relationship was regative correlation. |
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| Keywords: | Chengdu PM2 5 organic carbon elemental carbon precipitation |
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