▎ 摘　　要

NOVELTY - Removal of ammonia from gaseous environment involves contacting gaseous feedstream comprising an initial concentration of ammonia with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising reduced concentration of ammonia when compared with the initial concentration. The sorbent comprises graphene oxide supported on at least one compound chosen from metal salts, metal oxides and acids which are capable of reversibly adsorbing ammonia. USE - Removal of ammonia from gaseous environment ADVANTAGE - The method efficiently removes ammonia and formaldehyde with proven vacuum regenerability, and utilizes graphene-based sorbents with excellent regenerability, increased sorbent capacity and sorbent lifetime. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for removal of ammonia and volatile organic compound from gaseous environment, which involves contacting gaseous feedstream comprising an initial concentration of ammonia and an initial concentration of the organic compound with a sorbent system under conditions sufficient to produce an effluent stream comprising reduced concentrations of ammonia and organic compound when compared with initial concentrations. The sorbent system comprises graphene oxide supported on at least one compound chosen from metal salts, metal oxides and acids which are capable of reversibly adsorbing ammonia, and nitrogen and oxygen-functionalized graphene sorbent prepared by contacting graphene oxide with an amine of formula: NHR2(I) under reaction conditions sufficient to produce the nitrogen and oxygen-functionalized graphene sorbent. R = H, 1-7C alkyl or 1-7C aminoalkyl.