Chemical Transformation of Individual Asian Dust Particles Estimated by the Novel Double Detector System of Micro-PIXE

被引：0
作者：
Ma C.-J. [1 ]
机构：
[1] Department of Environmental Science, Fukuoka Women’s University, Fukuoka
来源：
Asian Journal of Atmospheric Environment | 2010年 / 4卷 / 2期
关键词：
Aging processes; Asian dust; Light elements; Micro-PIXE; Sea-salt; Single particle;
D O I：
10.1007/BF03654871
中图分类号：
学科分类号：
摘要：
By the application of novel double detector system of micro-PIXE that can detect light elements (Z<14), we made an attempt to provide a thorough discussion on the aging processes of Asian dust (hereafter called “AD”) particle by reaction with sea-slat. The elemental spectra and maps obtained from the microbeam radiation of micro-PIXE to individual AD particles were useful for fractionating AD particles into both internally and externally mixed particles. A spatial distribution of elements in a minute domain of single particle obtained by scanning the microbeam irradiation enabled us not only to estimate the chemical mixing state of individual AD particles but also to presume their aging processes in both ambient air and cloud. By calculating the normalized micro-PIXE net count of elements, it was possible to classify individual AD particles into three distinct groups (i.e., (1) Aging type 1: AD particle coated by the gaseous Cl evaporated by the reaction between artificial acids and sea salt; (2) Aging type 2: AD particle mixed with sea salt but no additional reaction with artificial acids; and (3) Non-aged type) A relatively high transformation rate (63.3–75.9%) was shown in large particles (greater than 5.1 μm in diameter). © 2010, Korean Society for Atmospheric Environment.
引用
收藏
页码：106 / 114
页数：8
相关论文
共 20 条
  • [1] Blanchette F.A., Sedimentation in a Stratified Ambient, Thesis of doctor of philosophy of Department of Mathematics. Massachusetts Institute of Technology, pp. 1-156, (2003)
  • [2] Desboeufs K.V., Losno R., Colin J.L., Factors influencing aerosol solubility during cloud processes, Atmospheric Environment, 35, pp. 3529-3537, (2001)
  • [3] Duce R.A., Unni C.K., Ray B.J., Prospere J.M., Merrill J.T., Long-range atmospheric transport of soil dust from Asia to the tropical north Pacific: Temporal variability, Science, 209, pp. 1522-1524, (1980)
  • [4] Gieray R., Wieser P., Engelhardt T., Swietlicki E., Hansson H.-C., Mentes B., Orsini D., Martinsson B., Svenningsson B., Noone K.J., Heintzenberg J., Phase partitioning of aerosol constituents in cloud based on single-particle and bulk analysis, Atmospheric Environment, 31, pp. 2491-2502, (1997)
  • [5] Hwang H.J., Kim H.K., Ro C.U., Single-particle characterization of aerosol samples collected before and during an Asian dust storm in Chuncheon, Korea, Atmospheric Environment, 42, pp. 8738-8746, (2008)
  • [6] Instrumentation for PIXE and RBS, pp. 1-78, (2000)
  • [7] Iwasaka Y., Yamamoto M., Imasu R., Ono A., Transport of Asian dust (KOSA) particles: importance of weak KOSA events on the geochemical cycle of soil particles, Tellus, 40B, pp. 494-503, (1988)
  • [8] Johansson S.A.E., Campbell J.L., PIXE: A novel technique for elemental analysis, pp. 134-140, (1988)
  • [9] Koltay E., Rajta I., Morales J.R., Borbely-Kiss I., Kiss A.Z., Characterization of individual eerosol particles from the eruption of Lonquimay volcano in Chile, Nuclear Instruments and Methods in Physics Research B, 1150, pp. 375-383, (1999)
  • [10] Ma C.-J., Kasahara M., Hwang K.C., Choi K.C., Choi S.B., Lee J.J., Physicochemical characteristics of single Asian dust storm particles, Journal of Korean Society for Atmospheric Environment, 16E, pp. 29-38, (2000)
12