In the production process of zinc sulfate,the presence of Fe and Mn had an adverse effect on the crystallization process of zinc sulfate production and reduce the purity of MgSO4·7H2O.Traditional chemical treatment methods are costly and easy to introduce new impurity ions.To obtain high-quality zinc sulfate,it is essential to develop a new Fe2+and Mn2+removal process.In this experiment,micro-nano bubble and ozone oxidation combined technology was used to explore the influence of different gas sources,temperature,CaCO3 dosage method and dosage...