作　　者： ; ; ; ; ; ; ;

机构地区： 中华人民共和国环境保护部

出　　处： 《环境科学学报》 2010年第10期1942-1949,共8页

摘　　要： 2008年1月1日～31日和7月1日～31日在广州城区每天采集1个PM2.5样品,对样品进行碳成分分析,得到有机碳(OC)、元素碳(EC)浓度.同步观测了气象因子以及SO2、NO2、O3气态污染物浓度.结果发现,冬季和夏季PM2.5日均值质量浓度分别为(81.2±61.4)μg.m-3和(53.7±23.2)μg.m-3,OC质量浓度分别为(24.6±19.3)μg.m-3和(14.0±5.6)μg.m-3,EC质量浓度分别为(7.9±5.4)μg.m-3和(4.7±2.2)μg.m-3,OC/EC比值分别为2.9±0.6和3.2±1.0.冬夏季非降雨的稳定天气条件下二次有机碳气溶胶(SOC)浓度分别为(6.1±6.6)μg.m-3和(5.8±5.2)μg.m-3.冬夏季SOC和O3浓度显著相关(p<0.01).东南风和西南风条件下,OC、EC浓度普遍较高,表明东莞、江门和佛山地区的工业污染源对广州地区污染物累积和霾天气的形成有一定的贡献. Daily PM2.5 samples were collected during January and July of 2008 in Guangzhou. The concentrations of organic carbon （OC） and elemental carbon （EC） were determined by a Thermal/Optical Carbon Analyzer. Meteorological parameters and concentrations of trace gases （SO2,NO2,and O3） were also collected simultaneously. The results show that in winter and summer,respectively,the daily average PM2.5 mass concentrations were （81.2±61.4） μg·m-3,and （53.7±23.2） μg·m-3,OC mass concentrations were （24.6±19.3） μg·m-3,and （14.0±5.6）μg·m-3,EC mass concentrations were （7.9±5.4） μg·m-3,and （4.7±2.2） μg·m-3,and the OC / EC ratios were 2.9±0.6 and 3.2±1.0. Secondary organic carbon （SOC） concentrations were （6.1±6.6） μg·m-3,and （5.8±5.2） μg·m-3 during days with clear and stable weather conditions in winter and summer,respectively. And SOC had a good correlation to O3 in summer and winter. OC and EC concentrations were generally higher under south-east and south-west wind conditions,which indicated the industrial pollution sources in the cities of Dongguan,Jiangmen and Foshan contribute greatly to high pollutant concentrations and the formation of haze in Guangzhou.

关 键 词： 有机碳 元素碳 二次有机碳 臭氧

领　　域： [环境科学与工程]