Wu Meng-Long, Guo Zhao-Bing, Liu Feng-Ling, Liu Jie, Lu Xi, Jiang Lin-Xian
Huan Jing Ke Xue. 2014 Feb;35(2):451-7.
The concentrations and size distributions of organic carbon (OC) and elemental carbon (EC) in particles collected in Nanjing Normal University representing urban area and in Nanjing College of Chemical Technology standing for industrial area were analyzed using Model 2001A Thermal Optical Carbon Analyzer. The mass concentrations were the highest with the size below 0.43 microm in urban and industrial area. OC accounted for 20.9%, 21.9%, 29.6%, 27.9% respectively and those were 24.0%, 23.5%, 31.4%, 22.6% respectively for EC in the four seasons in urban area. In the industrial area, OC accounted for 18.6%, 45.8%, 26.6%, 25.9% respectively and the proportions of EC were 16.7%, 60.9%, 26.3%, 24.3% respectively. Overall, OC and EC were enriched in fine particles below 2.1 microm and they accounted for the highest proportion in summer in urban area while it did not show significant seasonal variation for industrial area. SOC in fine particles achieved high values in summer while the unobvious seasonal variation in coarse particles might be attributed to the contribution of different pollution sources and meteorological factors. Correlations and OC/EC ratio method implied that OC and EC mainly came from vehicles exhaust and coal combustion in fine particles while they were also related to biomass combustion and cooking in coarse particles.
使用2001A型热光碳分析仪，对代表市区的南京师范大学和代表工业区的南京化工学院采集的颗粒物中有机碳（OC）和元素碳（EC）的浓度及粒径分布进行了分析。市区和工业区粒径小于0.43微米的颗粒物中质量浓度最高。市区四个季节中，OC分别占20.9%、21.9%、29.6%、27.9%，EC分别占24.0%、23.5%、31.4%、22.6%。在工业区，OC分别占18.6%、45.8%、26.6%、25.9%，EC的比例分别为16.7%、60.9%、26.3%、24.3%。总体而言，OC和EC在粒径小于2.1微米的细颗粒物中富集，在市区夏季占比最高，而工业区未表现出明显的季节变化。细颗粒物中的SOC在夏季达到较高值，而粗颗粒物中不明显的季节变化可能归因于不同污染源和气象因素的贡献。相关性和OC/EC比值法表明，细颗粒物中OC和EC主要来自机动车尾气和煤炭燃烧，而在粗颗粒物中它们也与生物质燃烧和烹饪有关。
