作　　者： ; ; ; ;

机构地区： 华南农业大学资源环境学院

出　　处： 《环境化学》 2009年第4期562-566,共5页

摘　　要： 采用2,4-二硝基苯肼衍生-高压液相色谱检测的方法测定了广州市大气中灰霾期和非灰霾期4种低分子量醛酮化合物(甲醛、乙醛、丙酮和丙醛).在灰霾期,4种化合物的含量在1.00—32.19μg·m-3,以乙醛的平均含量最高;非灰霾期以丙酮的平均含量最高.与非灰霾期相比,灰霾期的4种醛酮化合物含量明显增加.甲醛/乙醛和乙醛/丙醛浓度比值以及4种醛酮化合物的相关分析结果表明,广州市低分子量醛酮化合物主要来自人为排放源,并且灰霾期甲醛、乙醛和丙醛具有相似的源和汇.灰霾期人体对甲醛和乙醛的平均暴露水平(分别为55.2μg.d-1和62.7μg·d-1)是非灰霾期(分别为22.8μg·d-1和27.8μg·d-1)的2倍以上. Carbonyl compounds （including aldehydes and ketones） are one group of the major pollutants in ambient air, which are harmful to human. In 2005, four low-molecular-weight carbonyl compounds （formaldehyde, acetaldehyde, acetone and propionaldehyde） in atmosphere during haze and non-haze periods of Guangzhou were determined using 2,4-nitrobenzene hydrazine-high pressure liquid chromatography （HPLC） . During haze period, concentrations of these four carbonyls varied from 1.00 to 32. 191μg.m^-3, and acetaldehyde was the highest, while during non-haze period acetone was the highest one. Compared with non-haze period, concentrations of four carbonyl compounds during haze period were significantly increased. Concentration ratios of formaldehyde/acetaldehyde and acetaldehyde/propionaldehyde and correlation analysis of four carbonyls showed that they were mainly from the anthropogenic emission sources, and that during haze period formaldehyde, acetaldehyde and propionaldehyde have the similar sources and sinks. The average exposure levels of human to formaldehyde and acetaldehyde during haze period （55.2μg.d^-1 and 62. 7μg.d^-1, respectively） were about twice than those during non-haze period （22. 8μg .d^-1 and 27.8μg.d^-1, respectively） .

关 键 词： 羰基化合物 灰霾 暴露 大气

领　　域： [环境科学与工程] [理学] [理学]