Radium removal from water by manganese dioxide adsorption and diatomaceous-earth filtration. Final report
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.
- Research Organization:
- Houston Univ., TX (United States). Dept. of Civil and Environmental Engineering
- OSTI ID:
- 5865700
- Report Number(s):
- PB-92-115260/XAB
- Resource Relation:
- Other Information: Sponsored by Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORBENTS
SORPTIVE PROPERTIES
GROUND WATER
DECONTAMINATION
MANGANESE OXIDES
RADIUM
MATERIALS RECOVERY
ADSORPTION
COST
FILTRATION
PILOT PLANTS
RADIOECOLOGICAL CONCENTRATION
ALKALINE EARTH METALS
CHALCOGENIDES
CLEANING
ECOLOGICAL CONCENTRATION
ELEMENTS
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
MANAGEMENT
MANGANESE COMPOUNDS
METALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WATER
540330* - Environment
Aquatic- Radioactive Materials Monitoring & Transport- (1990-)
540130 - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (1990-)