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Main Title Radium removal from water by manganese dioxide adsorption and diatomaceous earth filtration /
Author Patel, Rahul. ; Clifford, D.
Other Authors
Author Title of a Work
Clifford, Dennis A.
CORP Author Houston Univ., TX. Dept. of Civil and Environmental Engineering.;Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div.
Publisher U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory,
Year Published 1991
Report Number EPA/600/2-91/063
Stock Number PB92-115260
Subjects Water--Purification--Filtration ; Water--Purification--Adsorption
Additional Subjects Manganese oxides ; Radium ; Filtration ; Diatomaceous earth ; Water treatment ; Ground water ; Concentration(Composition) ; Removal ; pH ; Pilot plants ; Cost analysis
Library Call Number Additional Info Location Last
NTIS  PB92-115260 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 92 pages : illustrations ; 28 cm
The study reveals that radium adsorption onto precipitated MnO2 followed by diatomaceous earth (DE) filtration is a very effective treatment process for radium-contaminated water. Radium removals in the range of 80% to 97% were observed for performed MnO2 feed concentrations of 0.63 and 1.26 mg/L as Mn in groundwaters with hardness in the range of 100 to 245 mg/L as CaCO3. Radium removal increased slightly with increasing pH whereas it decreased slightly with increasing hardness and iron (II) concentrations. Pilot studies were performed in Lemont, IL using DE filtration on a groundwater containing 12 pCi/L226Ra and 6 pCi/L228. Radium removals for both the pilot plants ranged from 90% to 97% at a MnO2 feed concentration of 1.26 mg/L as Mn, a total hardness of 245 mg/L as CaCO3, and a pH of 6.5. The costs of water treatment by MnO2 adsorption and DE filtration were estimated at $0.71 per 1000 gal for 280,000 gpd plants and $0.47 for 1 Mgd plants.