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Factors Affecting Radium Removal Using Mixed Iron—Manganese Oxides

Henry V. Mott, Sarabjit Singh, Venkateshwer R. Kondapally

Abstract

Batch experiments confirmed that sorption of radium by a mixed iron‐manganese oxide solid phase shows promise for treating radium‐contaminated water. The capacities of these mixed oxides for sorption of radium depend on the composition of the solid phase, the pH of the aqueous solution, and the presence of competing cations. The removal of the oxide‐radium complexes from aqueous suspension by manganese greensand filtration was also investigated. It was found that influent radium concentrations of 100 pCi/L were reduced to 2–9 pCi/L by this process. Additional study of the fate of radium in manganese greensand filters is recommended before this procedure is used for drinking water treatment.

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Key concepts: Radium, Manganese, Sorption, Chemistry, Filtration (mathematics), Aqueous solution, Water treatment, Inorganic chemistry