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Assessment of the Risk of Phosphorus Loading Due to Resuspended Sediment

^a Department of Limnology and Environmental Protection, P.O. Box 27, FIN-00014, University of Helsinki, Finland
^b Department of Applied Chemistry and Microbiology, P.O. Box 27, FIN-00014, University of Helsinki, Finland

View larger version (19K): [in a new window]   Fig. 1. Phosphorus desorption–sorption as a function of the phosphorus concentration in the bath solutions (deionized water or Tris buffer solution of different pHs) at various solid concentrations and under anoxic conditions (N2). The graphs were fitted by using a nonlinear (for solid concentrations of 170 and 17 mg L-1) or linear model (for solid concentration of 1700 mg L-1). • = pH 7, = pH 9, x = pH 7 N2, = deionized water.

View larger version (14K): [in a new window]   Fig. 2. Phosphorus mobilization from the sediment to the deionized water at different final pHs and solid concentrations. Mean and 95% confidence limits are expressed. = 1700 mg L-1, x = 170 mg L-1, and • = 17 mg L-1.