Reduction of Sulfate to Sulfide in Waterlogged Soil
1969
Connell, W. E. | Patrick, W. H.
A study was made of sulfate reduction to sulfide in water-logged soils supplied with an energy source. Sulfate reduction was more rapid in surface soil than in subsurface layers with sulfide appearing 2 days after waterlogging samples of a surface soil. The amount of sulfide precipitated from added H₂S in two soils was approximately equivalent to the amounts of ferrous iron released by waterlogging. Added Fe₂O₃ was effective in precipitating H₂S. Sulfate reduction was retarded by nitrate. Addition of oxygen to highly reduced soils caused a rapid decrease in sulfide content, with one-half of the sulfide being oxidized in 15 minutes and all the sulfide oxidized after 8 hours.
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