Recent trends of MnO2-derived adsorbents for water treatment: a review

Over the years, manganese dioxide (MnO2) and its different allotropes have gained significant research attention in the field of wastewater treatment because of their exciting physicochemical properties. This review covers recent progress in MnO2 based materials for wastewater remediation. The structure details of MnO2 are summarized followed by an overview of different methods adopted for the preparation of MnO2 and its composites. Special attention is paid to their applications in removal of metal ions and dyes. Some case studies are also presented to give insight into the potential of MnO2 for use on a pilot scale for the removal of metal ions. At the end, future perspectives are also suggested.