Investigations of Nitric Oxide Reactions in Soils
1963
The equilibrium reaction between NO (nitric oxide) and nongaseous compounds in the denitrification process was studied. Increments of NO were added to or removed from denitrification systems during the course of incubation. Nitric oxide rapidly equilibrates isotopically with non-gaseous products during the early stages of denitrification. Under acid soil conditions NO appeared in the gaseous phase. Under basic soil conditions NO did not appear from denitrification reactions but added NO persisted in the system and isotopically equilibrated with the non-gaseous products in the soil. The equilibrium reactions between NO and the nongaseous compounds in the denitrification system could not be adequately explained by the conventional equation 3NO₂⁻ + 3H⁺ ⇄ NO₃⁻ + H⁺ + 2NO + H₂O. The hypothesis is advanced that other reactions and products are involved.
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