Abstract: Nitrogen oxide reaction with humic substance was studied by using laser magnetic resonance. Humic substance is an important earth surfacc substance. Nitrogen oxide is one of mian pollutants.Studying their reaction lets tls know the earth surface substance interacting with atmospheric substance. The earth surface enviroment can eliminate pollution itself in some extent. 85% of NO₂ disappeared due to the reaction of NO₂ with humic acid. 90% of NO₂ disappeared due to the reactronof NO₂ with fulvic acid. 30% of NO was disappears during the reaction of NO with humic aicd. 33% of NO disappears when NO reacted with fulvic acid, at the same time humic substance is oxidized and nitrified, yielding organic-mineral fertilizer. This data is useful for dealing with industrial waste gases.

Key words: Nitrogen oxide, Humic substance, LMR