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Fig. 4. Conceptual trend for the persistence of organic chemicals in biosolids-amended soils. Curve A is for compounds that are volatile, water soluble, or easily degraded; Curves B and C are for compounds with intermediate sorption potential on biosolids; Curve D is for compounds whose initial degradation is rate-limited because the microbial population has not acclimated to the compounds; and Curve E is for compounds that are nonvolatile, relatively water insoluble, and recalcitrant (Beck et al., 1996, with permission).
