Sulfadiazine dissipation in acidic tropical soils

摘要: Sulfadiazine (SDZ) residues have been detected in manured soils as well their adjacent water resources, but its behavior is still poorly understood acidic tropical soils. This research aimed to evaluate sorption, leaching, and biodegradation of 14C-SDZ four from Brazil, using OECD guidelines. Except for the sand soil (Kd = 2.6 L kg−1), SDZ sorption tended be higher (Kd > 8.4 L kg−1) more hysteretic (ΔH >> 1) When freshly applied, leaching was low (  78% AR up 7 days). For certain soils, abrupt breakdown suggests that degradation should initially chemical then followed by enzymatically driven reactions. The fast formation NERs attributed mostly bounding humic substances (Type II-NER), sequestration cannot ruled out I-NER). represent a long-term environmental reservoir may cause deleterious effects on non-target organisms promote antibiotic resistance microbes.