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Fig. 2. Langmuir sorption isotherms (solid lines) for NH4+ in the Kennebec and Haynie soils exposed to the liquid swine waste (solid symbols) and the (NH4)2SO4 solutions (open symbols). The dashed lines indicate a different stage of sorption. The initial NH4+ concentrations in both solutions varied from 75 to 2085 mg NH4+–N L–1. Ce and qe are the equilibrium concentrations of NH4+ in the supernatant (mg NH4+–N L–1) and sorbed in the soils (mg NH4+–N kg–1), respectively.
