Surface Properties of Metal Hydroxide Microparticles in the Ambient Air

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 o...

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Main Authors: Zakharenko, Valery, Daibova, Elena, Karakchieva, Natalia
Format: Conference Proceeding
Language:English
Subjects:
Adsorption
Carbon dioxide
Carbon monoxide
Hydrochlorofluorocarbons
Microparticles
Molecular chains
Slaked lime
Surface chemistry
Surface properties
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Daibova, Elena
Karakchieva, Natalia
description 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.
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source Publicly Available Content Database
subjects Adsorption
Carbon dioxide
Carbon monoxide
Hydrochlorofluorocarbons
Microparticles
Molecular chains
Slaked lime
Surface chemistry
Surface properties
title Surface Properties of Metal Hydroxide Microparticles in the Ambient Air
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