Preparation method and application of composite oxidant

The invention provides a preparation method and application of a composite oxidant, and the preparation method comprises the following steps: dissolving hydroxide solid in water to form a turbid liquid, then adding a stabilizer, stirring, then adding an H2O2 solution to react for 10-30 min, adding a multi-metal hydrotalcite Cu-Zn-Fe-LDH turbid liquid prepared by a co-precipitation method, and stirring until the turbid liquid is uniform, thus obtaining the composite oxidant; adding an H2O2 solution, reacting for 10-30 minutes, carrying out solid-liquid separation, and drying the obtained solidto obtain a peroxide and Cu-Zn-Fe-LDH composite material which is used as a composite oxidant. The invention further provides application of the composite oxidant, the composite oxidant can be used asa Fenton-like reagent, H2O2 does not need to be added, and polybrominated diphenyl ethers can be efficiently and rapidly degraded by combining the composite oxidant with an ultrasonic method. 本发明提供了一种复合氧化剂的制备方法及其应用，制备方法包括如下步骤