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Effects Of Diffusion And Resuspension On Nutrient Release From Submerged Sediments, Ian Phillips, Edward Burton, Darryl Hawker
Effects Of Diffusion And Resuspension On Nutrient Release From Submerged Sediments, Ian Phillips, Edward Burton, Darryl Hawker
Associate Professor Edward D Burton
Nutrient release from a coarse-sand (CS) and a fine-sand (FS) estuarine sediment into the overlying water column was studied under static (diffusion-controlled) and dynamic (resuspension) conditions. Resuspension increased the amounts of NH4+, NO3- and P released from the sediment cores compared to those released by diffusion alone due to direct release of these nutrients from the readily available pore-water and ion exchange fractions. The average effective NH4+, NO3- and P diffusion coefficients (De) were found to be similar for both sediments, and did not vary significantly between static and dynamic conditions. Values of De were typically of the order of …