【作者】 赖森潮； 叶计朋； 邹世春； 张颖仪； 曹军骥； 李顺诚；

【Author】 LAI Sen-chao, YE Ji-peng, ZOU Shi-chun, ZHANG Ying-yi, CAOJun-ji, LEE Shun-cheng( School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China; Zhuhai Municipal Drainage Monitoring Center, Zhuhai, Guangdong 519020, China; Institute of Earth Environment, Chinese Academy of Sciences, Xi ’an, Shanxi 710075, China; Research Centre for Urban Environmental Technology & Management, The Hong Kong Polytechnic University, Hong Kong, China)

【机构】 中山大学化学与化学工程学院； 珠海市城市排水监测站； 中国科学院地球环境研究所； 香港理工大学城市环境科技与管理研究中心；

【摘要】 于2002年1月至2月在广州市3个点采集不同粒径(PM2.5和PM10)大气气溶胶样品,测定了PM2 5,PM10及其中的有机碳(OC)和元素碳(EC)浓度,探讨了广州市冬季碳气溶胶的污染特征.结果表明,PM2.5和PM10平均浓度分别为105.9μg/m3及161.7μg/m3,其中PM2.5中的OC,EC浓度分别为22.6μg/m3和8.3μg/m3,PM10中的OC,EC浓度分别为29.4和10.4 μg/m3.PM2.5和PM10的总碳气溶胶含量分别为40.5%和35.7%.PM2.5和PM10中OC/EC的比值平均为2.7,这与大多数城市大气的OC/EC比值接近.OC与EC的相关性很好(R>0.9),表明OC与EC的排放源相同.估算的PM2.5中次生有机碳(SOC)平均浓度为12.1μg/m3,占PM2.5中总OC浓度的49.6%;PM10的SOC平均浓度为14.3 μg/m3,占PM10中总OC的44.8%.更多还原

【Abstract】 Concentrations of organic carbon(OC) and elemental carbon(EC) in atmospheric particles were measured at three sites in Guangzhou, China during winter period (from January to February 2002). Average PM2.5 and PM10 levels were 105.9 μg/m3 and 161.7 μg/m3, respectively, with PM2.5 constituting 67.9% of the PM10 mass. The average OC and EC concentrations in PM2.5 were 22.6 and 8.3 μg/m3, respectively, while those in PM10 were 29.4 and 10.4 ug/m3, respectively. The carbonaceous aerosol accounted for 40.5% of the PM2.5 and 35.7% of the PM10. The average OC/EC ratio (2.7) for PM2.5 or PM10 was comparable with most urban cities in the world. The stronger correlation between OC and EC (R2>0.7) showed that there were similar EC and OC emissions in Guangzhou. Additionally, the estimated concentrations of secondary organic carbon were 12.1 μg/m3 in PM2.5 and 14.3 ug/m3 in PM10, which was comprised of 42.6% and 38.4% of the total organic carbon in PM2.5 and PM10, respectively.更多还原