All Title Author
Keywords Abstract

Further Laboratory Experiments on Aerosol Scavenging in Mixed Clouds to Assess the Role of Phoretic Forces and Particle Solubility

DOI: 10.4236/acs.2018.82015, PP. 235-247

Keywords: Aerosol Scavenging, Phoretic Forces, Mixed Clouds

Full-Text   Cite this paper   Add to My Lib


Scavenging experiments have been performed in a cloud chamber inside a cold room with different aerosol particles: Paraffin particles, NaCl particles, Magnesium oxide particles, Carbon particles, Sahara dust particles. Essentially the experimental tests were carried on following the sequence of operations: the generation of the aerosol particles, their injection in the lower part of the cloud chamber, injection of water droplets in the whole chamber volume, nucleation of ice crystals, collection of ice crystals and their examination as for resulting scavenging efficiency. Evidence is given of the peculiar behaviour of soluble particles, individual and eventually inside mixed particles, leading to very much important scavenging efficiency, probably to be ascribed to aerodynamic capture. The evident peculiar behaviour of deliquescent particles can be oriented towards applications to an efficient abatement of specific effluents, on one side, and to weather modification experiments, both rain enhancement and hail prevention experiments.


[1]  Santachiara, G., Prodi, F. and Belosi, F. (2013) Atmospheric Aerosol Scavenging Processes and the Role of Thermo- and Diffusion-Phoretic Forces. Atmospheric Research, 128, 46-56.
[2]  Prodi, F. (1976) Scavenging of Aerosol Particles by Growing Ice Crystals. Prepr. Int. Conference on Cloud Physics, Boulder, 26-30 July 1976, 70-75.
[3]  Prodi, F. and Oraltay, R.G. (1991) Scavenging of Aerosol Particles by Growing and Evaporating Ice Crystals: Assessing the Role of Competitive Processes. Proc. 5th Int.Conf. on Precipitation Scavenging and Atmosphere-Surface Exchange Processes, Richland, 15-19 July 1991, 75-86.
[4]  Santachiara, G., Prodi, F. and Buzzoni, N. (2000) Scavenging of Aerosols by Growing Ice Crystals Obtained with Control of Electrical Conditions. Proc.13th Conf. Clouds and Precipitation, Reno, 14-18 August 2000, 59-62.
[5]  Prodi, F., Santachiara, G., Belosi, F., Vedernikov, A. and Balapanov, D. (2014) Foretic Forces on Aerosol Particles Surrounding an Evaporating Droplet in Microgravity Conditions. Atmospheric Research, 142, 40-44.
[6]  Schwikowski, M., Baltensperger, U., Gaggeler, H.W. and Poulida, O. (1998) Scavenging of Atmospheric Constituents in Mixed Phase Clouds at the High-Alpine Site Jungfraujoch. Part III. Quantification of the Removal of Chemical Species by Precipitating Snow. Atmospheric Environment, 23, 4001-1010.
[7]  Murakami, M., Hiramatsu, C. and Magono, C. (1981) Observations of Aerosol Scavenging by Falling Snow Crystals at Two Sites of Different Heights. Journal of the Meteorological Society of Japan, 59, 763-771.
[8]  Prodi, F. and Tampieri, F. (1982) The Removal of Particulate Matter form the Atmosphere: The Physical Mechanisms. PAGEOPH, 120, 286-325.
[9]  Song, N. and Lamb D. (1994) Experimental Investigation of Ice in Super-Cooled Clouds. Part I: System Description and Growth of Ice by Vapour Deposition. Journal of the Atmospheric Sciences, 51, 91-103.<0091:EIOIIS>2.0.CO;2
[10]  Song, N. and Lamb D. (1994) Experimental Investigation of Ice in Super-Cooled Clouds Part II: Scavenging of an Insoluble Aerosol. Journal of the Atmospheric Sciences, 51, 104-116.<0104:EIOIIS>2.0.CO;2
[11]  Prodi, V. (1972) A Condensation Aerosol Generator for Solid Monodisperse Particles. In: Mercer, T.T., Morrow, P.P. and Stober, W., Eds., Assessment of Airborne Particles, Thomas Publisher, 169-181.
[12]  Prodi, F. and Fea, G. (1979) A Case of Transport and Deposition of Saharan Dust over Italian Peninsula and Southern Europe. Journal of Geophysical Research, 84, C11.
[13]  Tang, I.N. (2000) Phase Transformation and Growth of Hygroscopic Aerosols. In: Spurny, K.R., Ed., Aerosol Chemical Processes in the Environment, CRC Press LLC., Boca Raton, 6951-6960.
[14]  Tang, I.N. (1976) Phase Transformation and Growth of Aerosol Particles Composed of Mixed Salts. Journal of Aerosol Science, 7, 361.
[15]  Smithson, G.L. and Bakhashi, N.N. (1969) The Kinetics and Mechanism of the Hydration of Magnesium Oxide in a Batch Reactor. Canadian Journal of Chemical Engineering, 47, 508-513.


comments powered by Disqus