Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1992-04-09
1993-03-23
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210682, 210717, 210747, C02F 128
Patent
active
051961245
ABSTRACT:
A method is provided for reducing the radioactive material content of fluids withdrawn from subterranean reservoirs. The method involves deposition of sorbent solids within the reservoir matrix surrounding a production well to act as an in-situ filter for dissolved radionuclides present in reservoir pore waters. For this purpose, the sorbent solid is either a) precipitated within the reservoir matrix by the reaction of two or more carrier solutions or b) directly introduced into the reservoir as a solid component of a solid-liquid slurry using high-pressure injection techniques. Thereafter, fluids produced by the well contain significantly lower concentrations of radionuclides (e.g., principally radium and uranium ions), as radionuclides are removed from the inflowing reservoir fluids by means of ion exchange, adsorption, chelation, chemisorption, or coprecipitation with the in-situ filter medium.
REFERENCES:
patent: 3136715 (1964-06-01), Ames et al.
patent: 3449065 (1969-06-01), Kremer
patent: 3703208 (1972-11-01), Heckman et al.
patent: 3896045 (1975-07-01), Peeters et al.
patent: 4054320 (1977-10-01), Learmont
patent: 4636367 (1987-01-01), Huck et al.
patent: 4664809 (1987-05-01), Fenton et al.
patent: 4804498 (1989-02-01), Mizuno et al.
S. Subramonian et al., "Evaluating Ion Exchange for Removing Radium From Groundwater," Research & Technology, pp. 61-70 (May 1990).
D. Clifford, "Radium Removal From Water Using Softeners and Point-of-Use Devices," Technical Papers presented at Water Quality Assoc. Annual Convention, pp. 37-62 (Mar. 1989).
D. Clifford, "Removal of Radium from Drinking Water," Radon in Drinking Water, Chapter 16, pp. 225-247 (date unknown, edited by C. R. Cothern et al.).
D. Clifford, "Radon, Radium an Uranium in Drinking Water," pp. 234-238 (1990, edited by C. R. Cothern et al.).
Philip T. King, et al., Discussion of Irena Cech, et al, article "Radon Distributrion in Domestic Water of Texas," Ground Water Journal, vol. 27, No. 3, pp. 403-407 (May-Jun. 1989).
D. Clifford et al., "Evaluating Various Absorbents and Membranes for Removing Radium From Groundwater", Research & Technology, pp. 94-104 (Jul. 1988).
V. L. Snoeyink, et al., "Barium and Radium in Water Treatment Plant Wastes," EPA R&D Project Summary EPA/600/S2-85/006 (Mar. 1985).
R. J. Elsinger, et al., "Radium-224 in Natural Waters Measured by .gamma.-Ray Spectrometry," Analytica Chimica Acta, 144 pp. 277-281 (1982).
J. Michel et al., ".sup.228 RA and .sup.226 Ra in Drinking Water: A New Technique Using Gamma-Ray Spectroscopy and Results from South Carolina," Isotope Studies of Hydrologic Processes, Dept. of Geology Univ. So. Carolina, pp. 83-90 (no date).
Rama et al., "Mechanism of transport of U-Th series radioisotopes from solids into ground water," Geochimica et Cosmochimica Acta vol. 48, pp. 395-399 (1984).
P. T. King et al., "Ground water geochemistry of .sup.228 Ra, .sup.226 Ra and .sup.222 Rn," Geochimica et Cosmochimica Acta, vol. 46, pp. 1173-1182 (1982).
J. Michel, ".gamma.-Ray Spectrometry for Determination of Radium-228 and Radium-226 in Natural Waters," Anal. Chem. 53, pp. 1885-1889 (1981).
J. S. Nathwani et al., "Adsorption of .sup.226 Ra of Soils (I)," Chemosphere No. 5, pp. 285-291 (1979).
T. W. Healy, et al., "The Effect of Crystal Structure on the Surface Properties of a Series of Manganese Dioxides," Jnl of Colloid and Interface Science 21, pp. 435-444 (1966).
R. L. Valentine, et al., "Removing Radium by Adding Preformed Hydrous Manganese Oxides," Research & Technology, pp. 66-71 (Feb. 1990).
V. L. Snoeyink, et al., "Strong-Acid Ion Exchange for Removing Barium, Radium, and Hardness," Research & Technology pp. 66-72 (Aug. 1987).
N. A. Hahn Jr., "Disposal of Radium Removed From Drinking Water," Research & Technology pp. 71-78 (Jul. 1988).
J. P. Longtin, "Occurrence of Radon, Radium, and Uranium in Groundwater," Research & Technology, pp. 84-93 (Jul. 1988).
A. G. Myers, et al., "Removing Barium and Radium Through Calcium Cation Exchange," Research & Technology, pp. 60-66 (no date).
ASTM Designation: D2434-68, "Standard Test Method for Permeability of Granular Soils"(Constant Head), pp. 285-289 (Reapproved 1974).
Rahul Patel, et al., "Radium Removal From Water By Manganese Dioxide Adsorption and Diatomaceous Earth Filtration," 21 pages, Cooperative Research Agreement No. CR-813148, Submitted to Office of Research & Development, U.S. EPA (Oct. 18, 1991).
Deepak Garg, et al., "Removal of Radium from Water by Adsorption onto Barium Sulfate Impregnated and Plain Activated Alumina," 19 pages, Cooperative Research Agreement No. CR-812148, Submitted to Office of Research & Development, U.S. EPA (Feb. 24, 1992).
Clifford Dennis A.
Connor John A.
King Philip T.
Cintins Ivars
Groundwater Services, Inc.
LandOfFree
Method of controlling the production of radioactive materials fr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of controlling the production of radioactive materials fr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling the production of radioactive materials fr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1349728