Degradation of diazinon pesticide using catalyzed persulfate with Fe3O4@MOF-2 nanocomposite under ultrasound irradiation

Herein, Fe3O4@MOF-2 (MOF: metal-organic framework) nanocomposite, as a heterogeneous nano catalyst, was applied to activate persulfate (PS) in the attendance of ultrasonic (US) irradiation (Fe3O4@MOF-2/US/PS) for degradation of diazinon. The evaluation results showed that, in the acidic solution (pH = 3), the reaction rate constant of Fe3O4@MOF-2/US/PS system (0.0546 min(-1)) was more than 6-folds than that of the US/PS system (0.0079 min(-1)). Reducing the diazinon concentration, along with raising the Fe(3)O(0)4@MOF-2 dosage and the US bath power favored the degradation of diazinon. It was found that Fe3O4@MOF-2 had fine catalytic performance and reuseibility. The diazinon decomposition pathway was proposed by GC-MS analysis. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.