中文摘要：

选取广东某大型炼油厂废水处理站进行现场采样,采用PFPH衍生化-GC/MS联用技术分析挥发性羰基化合物（oVOCs）的组成特征和含量水平,研究了其源排放特征、化学反应活性. 结果表明,在该废水处理站大气中共检测出20种挥发性羰基化合物,各化合物的浓度范围为0~68.80 μg·m-3,各废水处理单元oVOCs总浓度均值为（253.02±124.5）μg·m-3. 背景校正后的质量浓度表明,各废水处理单元的大气中14种挥发性羰基化合物均占到总含量的 90%以上,其中己醛含量最高,浓度均值达到（44.74±20.89）μg·m-3,其次是 2-丁酮和乙醛,浓度均值分别达到（30.47±12.94）μg·m-3、（23.51±14.57）μg·m-3. 通过计算化学活性和大气寿命筛选出分子标志物,并建立了废水处理站的 oVOCs源成分谱.

英文摘要：

An observation was conducted at the wastewater treatment plant in a refinery in Guangdong province, using the PFPH-GC/MS method to analyze the composition and the concentration of volatile carbonyl compounds. The emission characteristics and the atmospheric chemical reactivity of these compounds were also studied. The results showed that 20 kinds of carbonyl compounds were detected with a concentration range of 0 to 68.80 μg·m-3. The mean value of total concentration in all processing unit was （253.02±124.5） μg·m-3. Background corrected concentrations showed that for each of the 6 treatment units of the plant, over 90% of the volatile carbonyl emissions were contributed by 14 of the 20 volatile carbonyl compounds, among which aldehyde was the most abundant with an average concentration of （44.74±20.89） μg·m-3, followed by 2-butanone and acetaldehyde with average concentrations of （30.47±12.94） μg·m-3 and （23.51±14.57） μg·m-3, respectively. Several molecular markers were identified based on the analysis of the chemical activities and atmospheric lifetimes of the 20 carbonyl compounds. Finally, a source profile was established for the plant.