fig6

Figure 6. Mean concentrations of PrP and its metabolites as a function of time in (A) sludge-amended soil and (B) compost-amended soil and curves of the applied kinetic models BEM: Bi-exponential model; FODED: first-order double-exponential decay; FOTC: first-order two-compartment; LM: logistic model; MHSM: modified hockey-stick model; PrP: Propylparaben. SFO: a single first-order; 3,4-DHB: 3,4-dihydroxybenzoic acid; 4-HB: 4-hydroxybenzoic acid.