This research aimed to investigate the ability of handling ammonia emission from waste gas by adsorption methods. The absorbents were activated carbon materials, which were made from coconut fiber (AC-1) and peanut husk (AC-2), impregnated with ZnCl2. | Vietnam Journal of Science and Technology 55 (4C) (2017) 38-43 RESEARCH ON THE ABILITY OF HANDLING AMMONIA CONTAMINATED AIR STREAM BY ACTIVATED CARBON MATERIALS FROM COCONUT FIBER (AC-1) AND PEANUT HUSK (AC-2), IMPREGNATED WITH ZnCl2 Nguyen Thi Kim Anh*, Ho Nhut Linh, To Thi Hien Faculty of Environment, University of Science, VNU-HCMC 227 Nguyen Van Cu, district No. 5, Ho Chi Minh city, Viet Nam * Email: ntkanh@ Received: 15 July 2017; Accepted for publication: 17 October 2017 ABSTRACT This research aimed to investigate the ability of handling ammonia emission from waste gas by adsorption methods. The absorbents were activated carbon materials, which were made from coconut fiber (AC-1) and peanut husk (AC-2), impregnated with ZnCl2. Both of these materials have shown their abilities to remove NH3 (over 90 % efficiency) at the concentration of about 9000 ppm, while the removal efficiency of commercial activated carbon (AC-3) was 70 %. At the inlet concentration of about 3000 ppm, the maximum ammonia removal efficiency was % when using AC-1 and % using AC-2. The saturation time of each activated carbon was also examined. At inlet concentration of 2800 – 3200 ppm with gas flow rate was and 5 g in mass material, the ammonia removal efficiencies of AC-1 and AC-2 were maintained at 80 % lasting for 600 minutes, but the efficiency of AC-3 rapidly decreased to 30 %. In all experiments, the activated carbon that made from peanut husk (AC-2), impregnated with ZnCl2 showed higher performance than one made from coconut fiber (AC-1) and commercial activated carbon (AC-3). Keywords: ammonia, adsorption, activated carbon. 1. INTRODUCTION In the natural environment, ammonia (NH3) is produced by the decomposition of animals and plants or from N2 in the air under the catalyzation of nitrogenases enzyme. This amount of NH3 is negligible and contributes to neutralize the acidity of the atmosphere. The metabolism process inside animal body also .
