Author(s)

Ranjit Kumar, K. Maharaj Kumari

Department of Applied Sciences, Technical College, Agra, India.
Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Agra, India.

This paper deals with parameterization method based on meteorological parameters for calculation of dry deposition of S compounds on natural surface (leaf of Cassia siamea) and direct measurement method. A scheme based on meteorological parameters has been evolved to calculate the dry deposition theoretically and a computer program has been developed. Experimentally dry deposition flux of S on leaf of Cassia siamea was measured by exposing the leaf surfaces on non-dewy, non-foggy and non rainy days and washing the leaf surfaces with deionised water and samples were analyzed by Dionex Dx-500 Ion Chromatograph. Atmospheric concentration of SO₂ was 3.54±1.41 μg m^-3 and particulate SO4^2- was 2.72±1.15 μg m^-3. Theoretically obtained dry deposition velocity of SO₂ and SO4^2- are 0.32 cm s^-1 and 0.75cm s^-1, respectively. The calculated deposition of S as total sulphate (gaseous SO₂ and particulate SO4^2-) to Cassia leaf was 2.05±0.78mg m^-2 d^-1 and experimentally obtained dry deposition of S as sulphate was 1.07±1.35 mg m^-2 d^-1. The experimentally and theoretically obtained mean values for S as SO4^2- are comparable.

Flux; Deposition Velocity; Parameterization; Sulphur; Gas and Particulate

R. Kumar and K. Maharaj Kumari, "Experimental and Parameterization Method for Evaluation of Dry Deposition of S Compounds to Natural Surfaces," Atmospheric and Climate Sciences, Vol. 2 No. 4, 2012, pp. 492-500. doi: 10.4236/acs.2012.24043.