| 长沙市大气中醛酮类化合物浓度变化特征 |
| |
| 引用本文： | 郑玄,蒋朝晖,翟海晴,王玉娇,赵文玉,傅鹏,杨志舒.长沙市大气中醛酮类化合物浓度变化特征[J].中国环境监测,2019,35(3):93-99. |
| |
| 作者姓名： | 郑玄 蒋朝晖 翟海晴 王玉娇 赵文玉 傅鹏 杨志舒 |
| |
| 作者单位： | 长沙理工大学化学与食品工程学院, 湖南 长沙410114,长沙理工大学化学与食品工程学院, 湖南 长沙410114,长沙理工大学化学与食品工程学院, 湖南 长沙410114,长沙理工大学化学与食品工程学院, 湖南 长沙410114,长沙理工大学化学与食品工程学院, 湖南 长沙410114,长沙市环境监测中心站, 湖南 长沙410001,长沙理工大学化学与食品工程学院, 湖南 长沙410114 |
| |
| 基金项目： | 国家自然科学基金项目(21307008)；湖南省科技厅计划项目(2014FJ3158)；长沙市科技局计划项目(K1403048-31)；湖南省重点研发计划项目(2018SK2011) |
| |
| 摘 要： | 参照美国环保署EPA-TO11标准方法,于2014年7—10月监测了长沙市大气中醛酮类化合物的质量浓度。主要监测到的醛酮类化合物为甲醛、乙醛、丙酮、丙醛、甲基丙烯醛,夏季质量浓度最高的是甲醛(13.86 mg/m3),其次是乙醛(7.28 mg/m3)、丙酮(7.14 mg/m3),秋季质量浓度最高的是甲醛(10.31 mg/m3),其次是丙酮(8.37 mg/m3)、乙醛(5.78 mg/m3)。夏季醛酮类化合物的总量高于秋季,甲醛、乙醛、丙酮的质量浓度最大值基本出现在13:00—15:00。C1/C2(甲醛/乙醛)、C2/C3(乙醛/丙醛)的平均值分别为2.02、10.19。分析了醛酮类化合物之间的相关性以及它们可能的来源。丙醛和甲醛、乙醛的相关性较好,三者有共同的人为来源。夏季大气中除丙酮外,其他醛酮类化合物的相关性均较好。夏季甲基丙烯醛和甲醛、乙醛、丙酮有相同的自然来源。综合分析可知,长沙大气中醛酮类化合物质量浓度受自然因素和人为因素的双重影响。
|
| 关 键 词： | 醛酮类化合物 光化学反应 来源 长沙 |
| 收稿时间： | 2018/5/27 0:00:00 |
| 修稿时间： | 2018/11/30 0:00:00 |
Variation Characteristics of Atmospheric Carbonyl Compounds in Changsha |
| |
| ZHENG Xuan,JIANG Zhaohui,ZHAI Haiqing,WANG Yujiao,ZHAO Wenyu,FU Peng and YANG Zhishu.Variation Characteristics of Atmospheric Carbonyl Compounds in Changsha[J].Environmental Monitoring in China,2019,35(3):93-99. |
| |
| Authors: | ZHENG Xuan JIANG Zhaohui ZHAI Haiqing WANG Yujiao ZHAO Wenyu FU Peng and YANG Zhishu |
| |
| Institution: | School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China,School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China,School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China,School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China,School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China,Changsha Environmental Monitoring Center, Changsha 410001, China and School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China |
| |
| Abstract: | The levels of carbonyl compounds in ambient air of Changsha City were measured from July 2014 to October 2014, referred to EPA-T011 method. Formaldehyde, acetaldehyde, acetone, propionaldehyde and MACR(methacrolein) were the predominant carbonyls in Changsha city. The highest concentration was formaldehyde (13.86 mg/m3), followed by acetaldehyde (7.28 mg/m3) and acetone (7.14 mg/m3) in summer, and the highest concentration was formaldehyde (10.31 mg/m3), followed by acetone (8.37 mg/m3) and acetaldehyde (5.78 mg/m3) in autumn. The total amount of carbonyls in summer was higher than that in autumn, and the maximum concentrations of formaldehyde, acetaldehyde, and acetone mostly appeared at 13:00-15:00. The average values of C1/C2 (formaldehyde/acetaldehyde) and C2/C3 (acetaldehyde/propionaldehyde) were 2.02 and 10.19, respectively. The correlation between carbonyls and their possible sources were analyzed. The correlation between propionaldehyde and formaldehyde and acetaldehyde was good, and they had the same human sources. The correlation of carbonyls in the atmosphere was good in summer except acetone. In summer, methacrolein and acetaldehyde, acetone had the same natural source. In summary, the concentration of carbonyls in the ambient air in Changsha were affected by both natural and human factors. |
| |
| Keywords: | carbonyls photochemical reaction source Changsha |
|
| 点击此处可从《中国环境监测》浏览原始摘要信息 |
| 点击此处可从《中国环境监测》下载免费的PDF全文 |
|
