NOVELTY - Removing nitrogen oxide groups (a) from waste material (A) comprises: providing (A) and a reaction vessel (B) containing reaction bed (C) (having zones), which is heated at operating temperature; providing agitating gas (D) and (A) in (C); providing co-reactant in (C) to form (A) and mineral; and operating the zones under conditions to reduce (a), removing (a) from (A) and producing inorganic residue and gaseous effluent.    USE - The method is useful for removing nitrogen oxide groups from waste material (claimed).    ADVANTAGE - The method is cost effective and does not reduces catalyst effectiveness.    DETAILED DESCRIPTION - Method for removing nitrogen oxide groups (a) from waste material (A) comprises: providing (A) comprising a nongaseous waste containing (a); providing a reaction vessel (B) containing a reaction bed (C) (having a first zone and a second zone) and heating (C) to an operating temperature; providing an agitating gas (D) and (A) in (C) where (D) provides a gas velocity that agitates (A), and (C) is fluidizable and (D) provides a gas velocity that fluidizes (C); providing a co-reactant in at least part of (C) to form with at least one component of (A) at least one mineral having a higher melting point than the waste component; and operating at least one of the zones under reducing conditions so that (a) in (A) are reduced at the operating temperature, removing (a) from (A) and producing an inorganic residue and a gaseous effluent that together have substantially less (a) than were present in (A).    INDEPENDENT CLAIMS are also included for a method for removing (a) from a waste material containing such groups comprising: providing (A); providing (B) containing a lower (C) (having at least one zone) and an upper (C) (having another zone), or providing a first (B) in fluid communication with a second (B), where the first vessel containing (C) having at least one zone and the second vessel containing (C) having another zone; heating each of (C) to an operating temperature; agitating the lower and upper (C) with (D), the lower (C) is fluidizable, or agitating each of (C) with (D), the bed of the first (B) is fluidizable, and (D) providing a gas velocity that fluidizes the lower (C) or the bed of the first (B); providing the nitrogen oxide (A) and a coreactant in at least part of the lower (C), or at least part of (C) of the first (B), to form with at least one component of (A), at least one mineral having a higher melting point than the waste component; and operating at least the lower bed zone, or at least the zone of the first (B), under reducing conditions, so that substantially all of (a) in (A) are reduced by eliminating substantially all (a) in (A) and leaving an inorganic residue of decreased concentration in (a) and a gaseous effluent of decreased concentration in (a).