广州万顷沙大气中醛酮类化合物的污染特征与来源分析  

Character of carbonyl compounds and their source in Guangzhou Wanqingsha atmosphere

作　　者：胡平[1,2] 文晟[1] 魏世龙[1,2] 刘永林[1,2] 毕新慧[1] 盛国英[1,3] 傅家谟[1,3] 

机构地区：[1]中国科学院广州地球化学研究所//有机地球化学国家重点实验室,广东广州510640 [2]中国科学院研究生院,北京100049 [3]上海大学环境与化学工程环境污染与健康研究所,上海200444

出　　处：《生态环境学报》2010年第6期1387-1391,共5页Ecology and Environmental Sciences

基　　金：国家自然科学基金创新群体项目(40821003);中科院创新群体项目(KZCX2-YW-403;SKLOG2009A03)

摘　　要：对广州万顷沙大气中的醛酮类化合物进行了检测。实验方法是应用醛酮类化合物和2,4-二硝基苯肼(DNPH)迅速反应生成衍生物,产物在高效液相色谱上检测。结果表明,大气中可以检出12种醛酮类化合物,其中丙酮质量浓度最高,其次是甲醛、乙醛和丙醛。这4种化合物平均质量浓度分别是22.07、9.99、7.80和1.20μg·m-3。白天醛酮类化合物的质量浓度比夜晚的高。ρ(甲醛)/ρ(乙醛)、ρ(乙醛)/ρ(丙醛)的数值显示大气中醛酮类污染主要和人为来源有关。甲醛、乙醛、丙醛和丁醛的质量浓度具有良好的相关性。广州城区的污染物随风迁移到万顷沙,使万顷沙也具有城市环境污染特征。Carbonyl compounds were measured in Wanqingsha, Guangzhou. The measurements were based on the rapid reaction of carbonyl compounds with 2, 4-dinitrophenylhydrazine （DNPH）, and their derivatives were detected by HPLC. 12 carbonyls were detected in samples. Acetone was the most abundant carbonyl, followed by formaldehyde, acetaldehyde and propionaldehyde. Con-centrations of these four carbonyls were 22.07, 9.99, 7.80 and 1.20 μg·m-3, respectively. Concentrations of carbonyl in daytime were higher than that at night. Concentrations rations of formaldehyde/acetaldehyde and acetaldehyde/propionaldehyde showed that an-thropogenic sources were the main sources. Pearson correlations for formaldehyde, acetaldehyde, propionaldehyde and butyralde-hyde showed they had similar sources. Wanqingsha was in the downwind of Guangzhou, the pollutants in urban atmosphere can transport to Wanqingsha.

关 键 词：醛酮类化合物 风向 大气 万顷沙 广州 

分 类 号：X51[环境科学与工程—环境工程]