NANOSTRUCTURED COMPOSITIONS HAVING REDUCED DISSOLUTION OF MANGANESE, METHOD OF MAKING THEM AND USING THEM IN WATER TREATMENT

摘要

Nanostructured manganese-containing compositions having reduced manganese dissolution and methods of making and using the same are provided, in one embodiment, the composition comprises a nanostructured oxide or hydroxide doped with Mn4+. The composition can be made by forming a nanostructured oxide or hydroxide material doped with Mn3+ and oxidizing the Mn3+ to Mn4+ to reduce dissolution of the manganese in the nanostructured oxide or hydroxide material. In another embodiment, a method of reducing dissolution of manganese present in a nanostructured MnO2 material comprises doping a nanostructured MnO2 material with Fe3+ to reduce the dissolution of the manganese. The compositions are used in water treatment to at least partially remove a contaminant there from.