| Main Title |
Radium removal from water by manganese dioxide adsorption and diatomaceous earth filtration / |
| Author |
Patel, Rahul. ;
Clifford, D.
|
| Other Authors |
|
| 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
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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 |
| Abstract |
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. |
| Notes |
Microfiche. |
