Removal of ammonia from air by fibrous ion exchangers

The paper presents the results of laboratory studies of ammonia sorption from air by fibrous ionexchange materials containing acidic groups in concentration of 3-5 mmoles per gram as a function of the ammonia concentration (3-30 ppm), relative air humidity, air flow rate and the thickness of filtering layer. It follows from our experiments that non-woven fabrics with the thickness of above 2 mm and surface density of -0.3 kg m(-2) can efficiently reduce ammonia concentration in air to <1 ppm at flow rates of <0.2 m s-1. The sorbent can be regenerated with acid solution to obtain salts that can be used as mineral fertilizers.