Tetracycline removal from model aqueous solutions by pretreated waste <i>Streptomyces fradiae</i> biomass

Pretreated waste Streptomyces fradiae biomass was used as biosorbent to remove tetracycline (TC) from model aqueous solutions. The biosorption study conducted in a batch system evaluate the impact of initial pH, dosage, TC concentration and contact time. Langmuir, Freundlich Dubinin–Radushkevich (D–R) models were applied describe isotherm equilibrium studies. Langmuir fitted data better than D–R model. monolayer capacity pretreated for 38.61 mg g−1. experimental also tested terms kinetics using pseudo-first-order pseudo-second order models. results showed that process followed well pseudo-second-order kinetics.