fig1

Figure 1. Mean concentrations of SMZ and AcSMZ as a function of time in (A) sludge-amended soil and (B) compost-amended soil with curves from kinetic models. AcSMZ: Acetylsulfamethoxazole; BEM: bi-exponential model; FODED: first-order double-exponential decay; FOTC: first-order two-compartment; SFO: a single first-order; SMZ: sulfamethoxazole.