Estudio de laboratorio sobre la captura de ácido acético por gotas de nube

M. L. ASAR, E.E. AVILA, R.A. TACCONE, S. I. LANE

Asociación Física Argentina

Año: 2012 vol. 23 p. 123 - 123

ield experiments have shown that fogs, clouds and precipitation play a significant role in the chemical composition of the atmosphere. The clouds redistribute trace compounds emitted at the Earth?s surface vertically from the boundary layer to the free troposphere and, in some cases, to the stratosphere, through many processes, such as scavenging, chemical reactions, precipitation, etc. Laboratory experiments have been carried out to investigate the uptake of acetic acid (CH3COOH) by water droplets under controlled temperature and liquid water content conditions. The measurements were performed with a continuous-flow cloud chamber. A special device has been developed to collect the cloud droplets in sufficient quantity for chemical analysis by means of gas chromatography. The scavenging ratios were determined by measuring the concentration of CH3COOH in the cloud droplet and in air. The experiments were performed under warm cloud conditions and the results show a linear depen