Remediation of the Earth's Atmosphere Through Photoinitiated Destruction of Freons on the Alkaline Earth Oxide Components of Tropospheric Aerosols Full article
Journal |
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757 |
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Output data | Year: 1999, Volume: 151, Number: 1-2, Pages: 367-376 Pages count : 10 DOI: 10.1016/S0927-7757(98)00699-2 | ||
Tags | Calcium hydroxycarbonate, Earth's atmosphere conditions, Freons, Magnesium oxide, Photoadsorption, Solid-gas interface | ||
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Abstract:
Interaction of some freons with the ambient air-exposed surface of magnesium oxide and calcium hydroxycarbonate in darkness and under mild UV radiation, corresponding to solar light in the troposphere, can result in efficient irreversible destructive adsorption of some freons. The above photoadsorption activity appears to be related to the optical absorption, detected at wavelengths ranging within 300–400 nm and caused presumably by surface carbonates or some other surface compounds. The irreversible adsorption is observed for H-containing freons like CF3CH2F and CHF2Cl, while for hydrogen-free ozone-depleting freons like CF2Cl2 no adsorption is detected. We suggest that at the photostimulated adsorption, fluorine and chlorine atoms substitute oxygen atoms in the magnesium oxide lattice and hydroxyl groups of calcium hydroxycarbonates.
It was also found that most of the observed photoadsorption phenomena might be related to the presence of a certain amount of N2O natively adsorbed on the alkaline earth oxides exposed to ambient air. Also under discussion is a possible impact of the solar light driven photoadsorption on solid tropospheric aerosols, containing magnesium oxide and calcium hydroxycarbonate, on the natural non-technogeneous remediation of the Earth's atmosphere from freons.
Cite:
Zakharenko V.S.
, Parmon V.N.
Remediation of the Earth's Atmosphere Through Photoinitiated Destruction of Freons on the Alkaline Earth Oxide Components of Tropospheric Aerosols
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 1999. V.151. N1-2. P.367-376. DOI: 10.1016/S0927-7757(98)00699-2 WOS Scopus РИНЦ
Remediation of the Earth's Atmosphere Through Photoinitiated Destruction of Freons on the Alkaline Earth Oxide Components of Tropospheric Aerosols
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 1999. V.151. N1-2. P.367-376. DOI: 10.1016/S0927-7757(98)00699-2 WOS Scopus РИНЦ
Dates:
Submitted: | Dec 13, 1997 |
Accepted: | Jul 28, 1998 |
Published online: | Mar 15, 1999 |
Published print: | Jun 15, 1999 |
Identifiers:
Web of science | WOS:000080033000033 |
Scopus | 2-s2.0-0344096715 |
Elibrary | 13321487 |
Chemical Abstracts | 1999:189435 |
Chemical Abstracts (print) | 130:356112 |
OpenAlex | W2050990201 |