南京大气细颗粒中有机碳与元素碳污染特征

摘要

为了解南京城区大气细颗粒物中有机碳与元素碳的污染特征,在国控点草场门进行了连续一年的PM25采样,分析了有机碳(0C)、元素碳(EC)、p( OC) /p( EC)污染特征和变化规律.结果表明,采样期间有些PM25的日均值超过了《环境空气质量标准》( GB 3095 - 2012)二级标准,p(OC)/p(EC)为0.77 ～ 4.98,平均值为1.92.PM2.5样品中OC约占18％、EC约占9％.%In order to find out organic and element carbon pollution characteristics in atmospheric fine particles in Nanjing,sampling and detection of PM2.5 were performed in one year for the concentration of organic carbon ( OC ) ,element carbon ( EC) ,p ( OC ) / p ( EC ) as well as their change rules. The results showed that p(OC)/p( EC) ranged from 0. 77 to 4. 98,average value 1.92. The OC accounted for 18% in PM2.5 sample,and EC 9% . Daily average concentration of PM2.5 during the sampling time had been over the Level-2 standard in the Ambient Air Quality Standard ( GB 3095 -2012) to indicate that carbon pollution of PM2.5 in Nanjing was relatively serious.