References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-10-947-2010

Size-resolved aerosol water-soluble ionic compositions in the summer of Beijing: implication of regional secondary formation

Guo

¹ Hu

¹ Wang

Z. B.

¹ Slanina

¹ Zhao

Y. L.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720, USA

01 02 2010

10 3 947 959

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To characterize aerosol pollution in Beijing, size-resolved aerosols were collected by MOUDIs during CAREBEIJING-2006 field campaign at Peking University (urban site) and Yufa (upwind rural site). Fine particle concentrations (PM1.8 by MOUDI) were 99.8±77.4 μg/m3 and 78.2±58.4 μg/m3, with PM1.8/PM10 ratios of 0.64±0.08 and 0.76±0.08 at PKU and Yufa, respectively, and secondary compounds accounted for more than 50% in fine particles. PMF model analysis was used to resolve the particle modes. Three modes were resolved at Yufa, representing condensation, droplet and coarse mode. However, one more droplet mode with bigger size was resolved, which was considered probably from regional transport. Condensation mode accounted for 10%–60% of the total mass at both sites, indicating that the gas-to-particle condensation process was important in summer. The formation of sulfate was mainly attributed to in-cloud or aerosol droplet process (PKU 80%, Yufa 70%) and gas condensation process (PKU 14%, Yufa 22%). According to the thermodynamic instability of NH4NO3, size distributions of nitrate were classified as three categories by RH. The existence of Ca(NO3)2 in droplet mode indicated the reaction of HNO3 with crustal particles was also important in fine particles. A rough estimation was given that 69% of the PM10 and 87% of the PM1.8 in Beijing urban were regional contributions. Sulfate, ammonium and oxalate were formed regionally, with the regional contributions of 90%, 87% and 95% to PM1.8. Nitrate formation was local dominant. In summary regional secondary formation led to aerosol pollution in the summer of Beijing.

References 1

Anlauf, K., Li, S. M., Leaitch, R., Brook, J., Hayden, K., Toom-Sauntry, D., and Wiebe, A.: Ionic composition and size characteristics of particles in the lower Fraser Vellay: Pacific 2001 field study, Atmos. Environ., 40, 2662–2675, 2006.

Chen, Y., Zhao, C., Zhang, Q., Deng, Z., Huang, M., and Ma, X.: Aircraft study of Mountain Chimney Effect of Beijing, China, J. Geophys. Res., 114, D08306, doi:10.1029/2008JD010610, 2009.

Chow, J.: Critical review of measurement methods to determine compliance with ambient air quality standards for suspended particulates, J. Air. Waste Manage., 45, 320–382, 1995.

Frenich, A. G., Galera, M. M., Vidal, J. L. M., Massart, D. L., Torres-Lapasio, J. R., De Braekeleer, K., Wang, J. H., and Hopke P. K.: Resolution of multicomponent peaks by orthogonal projection approach, positive matrix factorization and alternating least squares, Anal. Chem. Acta, 411, 145–155, 2000.

Han, L. H., Zhuang, G. S., Yele, S., and Wang, Z. F.: Local and non-local sources of airborne particulate pollution at Beijing, Sci. China. Ser B, 48(3), 253–264, 2005.

He, K. B., Yang, F. M., Ma, Y. L., Zhang, Q., Yao, X. H., Chan, C. K., Cadle, S., Chan, T., and Mulawa, P.: The characteristics of PM2.5 in Beijing, China, Atmos. Environ., 35(29), 4959–4970, 2001.

Hu, M., Zhao, Y. L., He, L. Y., Huang, X. F., Tang, X. Y., Yao, X. H., and Chan, C. K.: Mass Size Distribution of Beijing Particulate Matters and Its Inorganic Water-Soluble Ions in Winter and Summer, Environ. Sci., 26(4), 1–6, 2005a.

Hu, M., Zhang, J., and Wu, Z. J.: Chemical compositions of precipitation and scavenging of particles in Beijing, Sci. China. Ser B, 48(3), 265–272, 2005b.

Huang, X. F., Yu, J. Z., He, L. Y., and Yuan, Z. B.: Water-soluble organic carbon and oxalate in aerosols at a coastal urban site in China: Size distribution characteristics, sources, and formation mechanisms, J. Geophys. Res., 111, D22212, doi:10.1029/2006JD007408, 2006.

Jia, Y. T, Rahn, K. A., He, K. B., Wen, T. X., and Wang, Y. S.: A novel technique for quantifying the regional component of urban aerosol solely from its sawtooth cycles, J. Geophys. Res., 113, D21309, doi:10.1029/2008JD010389, 2008.

Jones, D. L.: Organic acids in the rhizosphere – a critical review, Plant Soil, 205, 25–44, 1998.

Kawamura, K. and Kaplan, I. R.: Motor exhaust emission as a primary source for dicarboxylic acids in Los Angeles ambient air, Environ. Sci. Technol., 21, 105–110, 1987.

Kawamura, K., Kasukabe, H., and Barrie, L. A.: Source and reaction pathways of dicarboxylic acids, ketoacids and dicarbonyls in Arctic aerosols: one year of observations, Atmos. Environ., 30, 1709–1722, 1996.

Kim, E., Hopke, P. K., Larson, T. V., and Covert, D. S.: Analysis of ambient particle size distributions using UNMIX and positive matrix factorization, Environ. Sci. Technol., 38, 202–209, 2004.

Kleeman, M. J., Schauer, J. J., and Cass, G. R.: Size and composition distribution of fine particulate matter emitted from wood burning, meat charbroiling and cigarettes, Environ. Sci. Technol., 33, 3516–3523, 1999.

Liu, S., Hu, M., Slanina J., He, L. Y., Niu, Y. W., Bruegemann, E., Gnauk, T., and Herrmann, H.: Size distribution and source analysis of ionic compositions of aerosols in polluted periods at Xinken in Pearl River Delta (PRD) of China, Atmos. Environ., 42(25), 6284–6295, 2008.

Michael, M.: The dissociation constant of ammonium nitrate and its dependence on temperature, relative humidity and particle size, Atmos. Environ., 27A, 261–270, 1993.

Narukawa, M., Kawamura, K., Anlauf, K. G., and Barrie, L. A.: Fine and coarse modes of dicarboxylic acids in the Arctic aerosols collected during the Polar Sunrise Experiment 1997, J. Geophys. Res., 108(D18), 4575, doi:10.1029/203JD003646, 2003.

Narukawa, M., Kawamura, K., Takeuchi, N., and Nakajima, T.: Distribution of dicarboxylic acids and carbon isopotic compositions in aerosols from 1997 Indonesian forest fires, Geophys. Res. Lett. 26, 3101–3104, 1999.

NBSC, National Bureau of Statistics of China: Bulletin of Statistics for Beijing, Part Two: Population, People life and social security, available online at: http://www.stats.gov.cn/tjsj/ndsj/2008/indexeh.htm, 2009a.

NBSC, National Bureau of Statistics of China: Bulletin of Statistics for Beijing, Part Three: Resource, Energy and Environment, available online at: http://www.stats.gov.cn/tjsj/ndsj/2008/indexeh.htm, 2009b.

Pakkanen, T. A., Kerminen, V. M., Hillamo, R. E., Makinen, M., Makela, T., and Virkkula, A.: Distribution of nitrate over sea-salt and soil derived particles implications from a field study, J. Atmos. Chem., 24, 189–205, 1996.

Peng, C. and Chan, C. K.: The water cycles of water soluble organic salts of atmospheric importance, Atmos. Environ., 35, 1183–1192, 2001.

Seinfeld, J. H. and Pandis, S. N.: Atmospheric chemistry and physics-from air pollution to climate change, John Wiley & Sons, Inc., New York, USA, 23–24,, 1998.

Shao, M., Tang, X. Y., Zhang, Y. H., and Li, W. J.: City Clusters in China: Air and Surface Water Pollution, Front Ecol. Environ., 4(7), 353–361, 2006.

Slanina, J., ten Brink, H. M., Otjes, R. P., Even, A., Jongejan, P., Khlystov, A., Waijers-Ijpelaan, A., Hu, M., and Lu, Y.: The continuous analysis of nitrate and ammonium in aerosols by the steam jet aerosol collector (SJAC): extension and validation of the methodology, Atmos. Environ., 35, 2319–2330, 2001.

Song, Y., Zhang, Y. H., Xie, S. D., Zeng, L. M., Zheng, M., Salmon, L. G., Shao, M., and Slanina, S.: Source apportionment of PM2.5 in Beijing by positive matrix factorization, Atmos. Environ., 40, 1526–1537, 2006.

Stelson, A. W. and Seinfeld, J. H.: Thermodynamic prediction of the water activity, NH4NO3 dissociation-constant, density and refractive index for the NH4NO3- (NH$_4)_2$SO4-H2O system at 25-degrees-C, Atmos. Environ., 16(10), 2507–2514, 1982.

Sun, Y. L., Zhuang, G. S., Tang, A. H., Wang, Y., and An, Z. S.: Chemical characteristics of PM$_2.5$ and PM$_10$ in haze-fog episodes in Beijing, Environ. Sci. Technol., 40(10), 3148–3155, 2006.

van Pinxteren, D., Brueggemann, E., Gnauk, T., Iinuma, Y., Mueller, K., Nowak, A., Achtert, P., Wiedensohler, A., and Herrmann, H.: Size- and time-resolved chemical particle characterization during CAREBeijing-2006: Different pollution regimes and diurnal profiles, J. Geophys. Res., 114, D00G09, doi:10.1029/2008JD010890,, 2009.

Wang, L. T., Hao, J. M., He, K. B., Wang, S. X., Li, J. H. Zhang, Q., Streets, D. G., Fu, J. S., Jang, C. J., Takekawa, H., and Chatani, S.: A modeling study of coarse particulate matter pollution in Beijing: Regional source contributions and control implications for the 2008 summer Olympics, J. Air Waste Manage, 58(8), 1057–1069, 2008.

Yang, F., He, K., Ye, B., Chen, X., Cha, L., Cadle, S. H., Chan, T., and Mulawa, P. A.: One-year record of organic and elemental carbon in fine particles in downtown Beijing and Shanghai, Atmos. Chem. Phys., 5, 1449–1457, 2005.

Yao, X. H., Chan, C. K., Fang, M., Cadle, Chan, S. T., Mulawa, P., He, K. B. and Ye, B. M.: The water-soluble ionic composition of PM2.5 in Shanghai and Beijing, China, Atmos. Environ, 36(26), 4223–4234, 2002.

Yao, X. H., Lau, A. P. S., Fang, M., Chan, C. K., and Hu, M.: Size distributions and formation of ionic species in atmospheric particulate pollutants in Beijing, China: 1 – inorganic ions, Atmos. Environ., 37(21), 2991–3000, 2003.

Zhuang, H., Chan, C. K., Fang, M., and Wexler, A. S.: Formation of nitrate and non-sea-salt sulfate on coarse particles, Atmos. Environ., 33, 4223–4233, 1999.