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广州大气细粒子中有机碳、元素碳和水溶性有机碳的分布特征

Characterization of Organic Carbon,Elemental Carbon and Water-Soluble Organic Carbon in PM_2.5 of Guangzhou City

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【Author】 HUANG Hong1,2,CAO Jun-ji2,TSANG Po-keung3,LI Shun-cheng4,HE Jian-hui4,ZOU Chang-wei1,ZOU Shi-chun5,LI Shi-ming5 (1.School of Environmental and Chemical Engineering,Nanchang University,Nanchang 330031;2.State Key laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075;3.The HongKong Institute of Education,HongKong;4.Department of Civil and Structural Engineering,The HongKong Polytechnic University,HongKong;5.School of Chemistry and Chemical Engineering,Sun Yat-sen University,Guangzhou 510275)

【机构】南昌大学环境与化学工程学院；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；香港教育学院；香港理工大学土木及结构工程系；中山大学化学与化学工程学院；

【摘要】在广州市中山大学采样点进行了为期1年的大气细粒子(PM2.5)采样,监测分析得到PM2.5及有机碳(OC)、元素碳(EC)和水溶性有机碳(WSOC)等组分的质量浓度,并进行了比较和评价分析。结果表明广州市细粒子碳污染较严重。对OC、EC和WSOC质量浓度的月变化和季节变化特征进行了讨论,并分析了原因。OC、EC浓度相关性好,表明OC、EC来源大部分相同。根据OC/EC比值,估算二次有机碳(SOC)量,结果是SOC占OC的1/3。讨论了SOC和SOC/OC比值的季节分布,结果证明SOC夏季生成比冬季多。更多还原

【Abstract】 Daily PM2.5 samples were collected at Sun Yat-sen University in Guangzhou city,lasting 1 year.The loaded samples were weighted for PM2.5 mass concentration,and analyzed for organic carbon(OC),elemental carbon(EC),and water-soluble organic carbon(WSOC).Monthly and seasonal distribution characters of PM2.5 and OC,EC,WSOC were discussed and the results obtained in this study were compared with others,showing severe carbonaceous pollution in Guangzhou.OC-EC relationship was good,indicating most of sources of OC and EC was the same.Secondary organic carbons(SOC) were estimated based on OC/EC ratio.SOC contributed average 1/3 to OC in PM2.5.SOC and SOC/OC ratio seasonal distributions were investigated,and the results clemonstrated that SOC formed more in summer than in winter.更多还原