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Chemical oxidation with Fenton’s reagent (H 2 O 2 ) was applied to two soils contaminated with TPH (total petroleum hydrocarbons as crude oil). Soil YA contains 2.69% TPH and 11.31% soil organic matter (SOM); the TPH/SOM ratio is 0.24:1.0. Soil XI contains 8.97% TPH and 5.93% SOM, i.e. the TPH/SOM ratio is 1.51:1.0. The results indicate that in soil with a low TPH/SOM ratio (containing a higher percentage of SOM), SOM could be removed easily and consume H 2 O 2  more effectively than crude oil, and O 2  gas may be a major product of the H 2 O 2  decomposition. However, in the soil with a high TPH/SOM ratio, a low initial rate of O 2  generation was obtained, and the SOM may need to be modified to improve the removal of the crude oil in that soil.

Effect of the Ratio of Crude Oil to Soil Organic Matter on H 2 O 2 Decomposition and Oxidation of Crude oil in Contaminated Soils