OXIDATION OF NITRITES AND OXALATES IN SOILS

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Abstract
Appreciable quantities of KNO2 are oxidized to KNO3 in the presence of soil acids and acid solutions under sterile conditions. A correlation of 0.83 was found between the base exchange capacity of the soil and the amt. of nitrite oxidized. Heating soils to above 400 [degree]C reduced their ability to oxidize nitrites. Oxidation of oxalates was not related to the exchange capacity of the soil nor to its acidity, indicating a different mechanism for oxidizing this material from that for nitrites. Various soil constituents as A12O3, Fe2O3, and SiO2 have the ability to oxidize oxalates.