Mineral dust particles

Figure 3.13. Examples of the positive ion and negative ion spectrum acquired from a single mineral dust particle (of aerodynamic particle diameter 1 pm). (Trimborn et al. 2000.)...

Effect of sie on heterogeneous nucleation. Figure 17 shows an example of a mineral dust particle coated by hygroscopic salts. The deliquescence/efflorescence hysteresis cycle is reduced due to heterogeneous nucleation when foreign material, such... 

Lodge et al. 1968) that the greater sulfate content of precipitation water in an arid environment is due to mineral dust particles and to the effect of evaporation below the cloud base. Soils in these areas contain calcium carbonate and calcium sulfate in significant proportions. Calcium carbonate particles in the air are transformed into calcium sulfate by reacting with sulfur dioxide. The process is an interesting interaction of natural and man-made trace constituents. 

Mineral dust is emitted from both natural and anthropogenic activities. Natural emissions arise by wind acting on undisturbed source regions. Anthropogenic emissions result from human activity, including (1) land-use changes that modify soil surface conditions and (2) climate modifications that, in turn, alter dust emissions. Such modifications include changes in windspeeds, clouds and precipitation, and the amounts of airborne soluble material, such as sulfate, that may become attached to mineral dust particles and render them more susceptible to wet removal. 

Erel Y, Dayan U, Rabi R et al (2006) Trans boundary transput of pollutants by atmospheric mineral dust. Environ Sci Technol 40 2996-3005 Falkovich AH, Ganor E, Levin Z et al (2001) Chemical and mineralogical analysis of individual mineral dust particles. J Geophys Res 106 18029-18036... 

Falkovich AH, Schkolnik G, Ganor E et al (2004) Adsorption of organic compounds pertinent to urban environments onto mineral dust particles. J Geophys Res 109 1-19 Freiman MT, Hirshel N, Broday DM (2006) Urban-scale variability of ambient particulate matter attributes. Atmos Environ 40 5670-5684... 

Nousiainen T Optical modeling of mineral dust particles a review, Quant Spectrosc Radiat rraKs/110(14-16) 1261-1279, 2009. 

The yield of retained fraction in the case of irregularly shaped particles was found to be 1.3-1.5 times that for particles with a rounded shape. In crushing operations, for example, particles of barite, quartz, feldspar, and magnetite form rounded particles, decreasing their adhesion. The wastes from low grades of asbestos contain irregularly shaped mineral dust particles, which adhere to the drum surface and are separated as the retained fraction [137]. 

Seisel et al. (2005) proposed a mechanism for the reaction of N2O5 with mineral dust particles as. 

Usher, C.R., Al-Hosney, H., Carlos-Cuellar, S., Grassian, V.H. A laboratory study of the heterogeneous uptake and oxidation of sulfur dioxide on mineral dust particles. J. Geophys. Res. 107,4713 (2002)... 

Soluble Layers on Mineral Dust Particles and the Impact on Clouds Characteristics , Final Report to GIF, April 2002. 

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