Removal of Radionuclides from Aqueous Solution by Manganese Dioxide-Based Nanomaterials and Mechanism Research: A Review

Manganese dioxide (MnO2) is an environmentally friendly metal oxide. The characteristics of diverse morphology, rich crystal forms, and controllable particle size make MnO2 flexibly adaptive to multiple requirements, attracting researchers in multidisciplinary fields. It is worth noting that MnO2 and its derived materials have shown outstanding research progress in the treatment of radioactive pollutants in the past few decades. Given the need to summarize the research advances, this reivew surveys the achievements of MnO2-based nanomaterials in radioactive ion removal. The preparation and modification methods of MnO2, the application of MnO2-based materials in removing radionuclides, and the exploration of potential adsorption mechanisms will be carefully discussed. Finally, the research trends are summarized and an outlook is presented, aiming at providing reference for further design and synthesis of MnO2-based nanomaterials with practical application value for removal of radionuclides.