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广州市夏、冬季室内外PM_2.5质量浓度的特征

Mass concentration characterization of PM_2.5 indoor and outdoor during summer and winter period in Guangzhou City

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【Author】 Huang Hong 1,2,Li Shuncheng 3,Cao Junji 2,Zou Changwei 4,Chen Xingeng 5,Fan Shaojia 5.(1.School of Chemistry and Environment,South China Normal University,Guangzhou Guangdong 510006;2.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an Shanxi 710075; 3.Department of Civil and Structural Engineering,Hongkong Polytechnic University,Kowloon Hongkong; 4.School of Environmental Science and Engineering,Nanchang University,Nanchang Jiangxi 330029; 5.School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou Guangdong 510275)

【机构】华南师范大学化学与环境学院；香港理工大学土木及结构工程系；中国科学院地球环境研究所黄土与第四纪地质国家重点实验室；南昌大学环境科学与工程学院；中山大学环境科学与工程学院；中山大学环境科学与工程学院广东广州510006中国科学院地球环境研究所黄土与第四纪地质国家重点实验室；陕西西安710075；香港九龙；江西南昌330029；广东广州510275；

【摘要】 2004年7月2日至8月13日和2004年11月29日至2005年1月6日分别在广州市3种类型区域(一般城市区域、道路旁、工业源附近)9个居民住宅的室内和室外同步采集了PM2.5颗粒。采用标准称重法测定PM2.5质量浓度,得到广州市夏季住宅室内外PM2.5平均质量浓度分别为67.7、74.5μg/m3,冬季室内外PM2.5平均质量浓度分别为109.9、123.7μg/m3。广州市PM2.5平均质量浓度,与美国PM2.5标准相比,与国内PM10标准基础上假设的PM2.5限值相比,与其他一些国内、亚洲和欧美城市的文献记录相比,结果均显示广州市PM2.5处于相当严重污染状态。广州市PM2.5质量浓度呈现明显的空间分布特征和季节变化特征;PM2.5室内质量浓度并不总是低于室外质量浓度,反映了室内空气污染的存在。更多还原

【Abstract】 Daily (24-h average) PM_ 2.5 (aerodynamic diameter < 2.5 m) were collected inside and outside nine residential homes simultaneously in 3 kinds of urban area in Guangzhou city from July 2 to August 13,2004 and from November 29,2004 to January 6,2005,respectively.Average mass concentrations of PM_ 2.5 were determined by using standard weight method.During summer sampling period,average indoor and outdoor concentrations of PM_ 2.5 in Guangzhou were 67.7 μg/m 3 and 74.5 μg/m 3,respectively,and during winter sampling period average indoor and outdoor concentrations of PM_ 2.5 in Guangzhou were 109.9 μg/m 3 and 123.7 μg/m 3,respectively.The PM_ 2.5 concentrations of Guangzhou were compared with that of NAAQS in USA,with 3 kinds of specific fractions of PM_ 10 standard value of China,and with the PM_ 2.5 records of other cities in China,Asia,Europe and USA,respectively.Results indicated that PM_ 2.5 pollution in Guangzhou was very severe.In addition,it was found that mass concentrations of PM_ 2.5 in Guangzhou showed obvious spatial distribution and seasonal variation characteristics.Mass concentrations of indoor PM_ 2.5 were not always lower than that of the outdoor,implying presence of indoor air pollution.更多还原

【关键词】 PM2.5；质量浓度；室内空气；室外空气；
【Key words】 PM_ 2.5 Mass concentration Indoor air Outdoor air；

【基金】黄土与第四纪地质国家重点实验室开放基金资助项目(SKLLQG0610)。