广州市环境空气中醛酮类化合物的污染特征研究

Study on Pollution Characteristics of Aldehydes and Ketones in Ambient Air of Guangzhou

本文选取13种醛酮类化合物作为研究对象,分析了广州市三个区域的醛酮类化合物的污染特征和变化规律。结果显示,广州市大气中醛酮类化合物主要有甲醛、丙酮、乙醛、丙醛、2-丁酮,检出的醛酮类化合物均与气温有显著正相关性,与湿度无显著相关性。C_(1)/C_(2)体积分数比值具备城市大气的特征,C_(2)/C_(3)体积分数比值说明植物也会释放出大量醛酮类化合物。甲醛、乙醛,丙醛、丙酮间存在正相关关系,证明他们可能有同一来源。

This paper selects 13 kinds of aldehydes and ketones as the research objects,and analyzes the pollution characteristics and changing laws of aldehydes and ketones in three areas of Guangzhou.The results showed that the main aldehydes and ketones in the atmosphere of Guangzhou were formaldehyde,acetone,acetaldehyde,propionaldehyde,2-butanone,and the detected aldehydes and ketones had a significant positive correlation with temperature,but no significant correlation with humidity.The C_(1)/C_(2) volume fraction ratio has the characteristics of urban atmosphere,and the C_(2)/C_(3) volume fraction ratio indicates that plants also release a large amount of aldehydes and ketones.There is a positive correlation between formaldehyde,acetaldehyde,propionaldehyde and acetone,which proves that they may have the same source.