PM中水溶性有机物吸光特性的模拟研究

被引：7

作者：

吴一凡

黄晓锋

兰紫娟

宫照恒

云慧

何凌燕

机构：

[1] 不详

[2] 北京大学深圳研究生院环境与能源学院,城市人居环境科学与技术重点实验室

[3] 不详

来源：

中国环境科学 | 2013年 / 10期

关键词：

光声光谱仪; 水溶性有机物(WSOM); 吸光系数; 质量吸收效率(MAE);

D O I：

暂无

中图分类号：

X513 [粒状污染物];

学科分类号：

摘要：

研究建立了超声雾化器与光声光谱仪,扫描电迁移率颗粒物粒径谱仪联用的分析系统,将深圳市2011年夏季采集的PM2.5膜样品提取液雾化发生气溶胶,使之进入光声光谱仪检测其吸光强度以研究气溶胶中水溶性有机物(WSOM)的吸光特征.结果表明:观测期间PM2.5中WSOM平均质量浓度为(4.3±2.3)μg/m3,分别占PM2.5和OM质量浓度的11.9%±4.8%和49.2%±18.5%.WSOM在405,532,781nm波长下的质量吸收效率值(MAE)分别为(0.55±0.31),(0.54±0.31),(0.21±0.13)m2/g.经计算所得:深圳市夏季大气PM2.5中WSOM在405,532,781nm波长下的平均吸收系数分别为(2.30±1.08),(2.25±1.26),(0.86±0.45)Mm-1,对应的WSOM对大气PM2.5整体吸光效应的贡献率分别为7.6%,10.6%和5.8%,说明WSOM对PM2.5整体吸光效应的贡献不容忽视,有机气溶胶在大气灰霾中的能见度损害作用值得进一步深入研究.

引用

页码：1736 / 1740

页数：5

共 14 条

[1] 深圳市冬季大气消光性质与细粒子化学组成的高时间分辨率观测和统计关系研究
姚婷婷
黄晓锋
何凌燕
胡敏
孙天乐
薛莲
林云
曾立武
张远航
[J]. 中国科学:化学, 2010, 40 (08) : 1163 - 1171
[2] Light absorption of black carbon aerosol and its enhancement by mixing state in an urban atmosphere in South China[J] Zi-Juan Lan;Xiao-Feng Huang;Kuang-You Yu;Tian-Le Sun;Li-Wu Zeng;Min Hu Atmospheric Environment 2012,
[3] Hygroscopic property of water-soluble organic-enriched aerosols in Ulaanbaatar; Mongolia during the cold winter of 2007[J] Jinsang Jung;Young J. Kim;Shankar Gopala Aggarwal;Kimitaka Kawamura Atmospheric Environment 2011,
[4] A critical review of advanced analytical techniques for water-soluble organic matter from atmospheric aerosols[J] Regina M.B.O. Duarte;Armando C. Duarte Trends in Analytical Chemistry 2011,
[5] Water-Soluble Organic Aerosol material and the light-absorption characteristics of aqueous extracts measured over the Southeastern United States[J] Hecobian A.;Zhang X.;Zheng M.;Frank N.;Edgerton E. S.;Weber R. J. Atmospheric Chemistry and Physics 2010,
[6] Hygroscopic properties of Amazonian biomass burning and European background HULIS and investigation of their effects on surface tension with two models linking H-TDMA to CCNC data
Fors, E. O.
Rissler, J.
Massling, A.
Svenningsson, B.
Andreae, M. O.
Dusek, U.
Frank, G. P.
Hoffer, A.
Bilde, M.
Kiss, G.
Janitsek, S.
Henning, S.
Facchini, M. C.
Decesari, S.
Swietlicki, E.
[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS, 2010, 10 (12) : 5625 - 5639
[7] Investigation of cloud condensation nuclei properties and droplet growth kinetics of the water-soluble aerosol fraction in Mexico City[J] Padró; Luz T.;Tkacik; Daniel;Lathem; Terry;Hennigan; Chris J.;Sullivan; Amy P.;Weber; Rodney J.;Huey; L. Greg;Nenes; Athanasios Journal of Geophysical Research. Atmospheres 2010,
[8] Laboratory and Ambient Particle Density Determinations using Light Scattering in Conjunction with Aerosol Mass Spectrometry[J] Eben S. Cross;Jay G. Slowik;Paul Davidovits;James D. Allan;Douglas R. Worsnop;John T. Jayne;David K. Lewis;Manjula Canagaratna;Timothy B. Onasch Aerosol Science and Technology 2007,
[9] Cloud Condensation Nuclei properties of model and atmospheric HULIS
Dinar, E.
Taraniuk, I.
Graber, E. R.
Katsman, S.
Moise, T.
Anttila, T.
Mentel, T. F.
Rudich, Y.
[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS, 2006, 6 : 2465 - 2481
[10] Characterization and source apportionment of atmospheric organic and elemental carbon during fall and winter of 2003 in Xi'an; China[J] Cao J. J.;Wu F.;Chow J. C.;Lee S. C.;Li Y.;Chen S. W.;An Z. S.;Fung K. K.;Watson J. G.;Zhu C. S.;Liu S. X. Atmospheric Chemistry and Physics 2005,

← 1 2 →