Vol. 34, issue 06, article # 7

Abstract:

The adsorption and photosorption properties of aerosol particles from zircon (ZrSiO₄) have been studied under conditions similar to tropospheric. For the aerosol, the physicochemical characteristics were determined by diffuse reflection spectroscopy. The analysis of the composition of the adsorbed layer formed in the troposphere is carried out. In the dark, mainly carbon dioxide is desorbed from the surface of zircon microparticles, as when illuminating the surface of aerosol particles. The kinetic dependences of СО₂ desorption and О₂ adsorption in the dark and under illumination are studied. The quantum yields and spectral dependences of the quantum yields of photodesorption and photoadsorption are determined. The spectral dependences of the effective quantum yield confirm the photochemical activity of the deposited aerosol from zircon under solar irradiation (λ > 300 nm).

Keywords:

zircon mineral, precipitated aerosol, tropospheric conditions, adsorbed layer, photodesorption, photoadsorption, quantum yield

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