MATEC Web Conf.
Volume 96, 2017III International Symposium “Fundamental Aspects of Rare-Earth Elements Exploration, Mining and Separation and Modern Materials Engineering” (REE-2016)
|Number of page(s)||8|
|Published online||19 January 2017|
Surface Properties of Metal Hydroxide Microparticles in the Ambient Air
1 Boreskov Institute of Catalysis, Novosibirsk, Russia Federation
2 Siberian Research Institute of Agriculture and Peat, Branch of the Siberian Federal Agrobiotechnology Research Center, Russian Academy of Sciences, Tomsk, Russia Federation
3 Tomsk State University, Tomsk, Russian Federation
* Corresponding author: email@example.com
The adsorption and photoadsorption properties of Mg(OH)2 and Ca(OH)2 microparticles in the ambient air were investigated. The compositional analysis of an adsorption layer of microparticles was carried out. The kinetics of photodesorption of molecules from microcrystal surfaces and the interaction of HCFC-22 (CHF2Cl) in the dark and under light were studied. Quantum yields and their spectral dependencies were determined for CO2 photodesorption, O2 and CO photoadsorption. The effect of weakly bound CO displacement from the surface of microparticles was revealed during dark adsorption of HCFC-22. It is supposed that adsorbed CO is formed as a result of atmospheric CO2 reduction after the break of Mg—OH bonds. In case of calcium hydroxide, CO is generated during the interaction of calcium hydroxide with carbon dioxide in the presence of water.
© The Authors, published by EDP Sciences, 2017
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