ADSORPTION OF AMMONIA BY SEPIOLITE IN AMBIENT AIR

Abstract

The adsorption of ammonia by sepiolite containing water previously adsorbed, was studied in ambient atmosphere. The ammonia-adsorbing capacity of sepiolite grains, treated with water vapor, increased as the relative humidity in the air was lowered. The apparent ammonia adsorption isohume on sepiolite follows Freundlich's one. The amount of ammonia adsorbed on sepiolite grains was about 1.68 mg/g at 9.0% relative humidity in the air containing 10 ppm ammonia at 25°C, and it was about 0.32 mg/g in the relative humidity range of 60 to 80%