COMPOSICION IONICA DEL AEROSOL ATMOSFERICO EN AREAS INDUSTRIALES DEL NORTE DE ESPAÑA

Over the years 1986, 1987 and 1988 determinations of the mass concentration of total particles in suspension and of the anionic components (chlorides, nitrates and sulphates) and cationics (sodium, potassium, calcium, magnesium and ammonia) contained in these was carried out in Bilbao, Sestao and Erandio. The determination of the mass of particles was carried out by gravometry and chemical composition by ionic chromatography. The particle concentrations in Bilbao and Sestao, over the measuring period, were higher than those in Erandio. The studies of concentrations, percentages and correlations show the existance of centres of calcium emission during one season and high levek of chlorides during al1 of them. Surprisingly nough, the nitrate and ammonia content for all the seasons is low in comparison with other urban and industrial centres of the Peninsular inland.