COMBINATIONS OF LIQUID FILTRATION MEDIA AND METHODS FOR ENHANCED FILTRATION OF SELECTED WATER CONTAMINANTS

• US 20130022686A1
• Filed: 07/22/2011
• Published: 01/24/2013
• Est. Priority Date: 07/22/2011
• Status: Abandoned Application

• Current Assignee: Hydropure Technologies Incorporated
• Original Assignee: Hydropure Technologies Incorporated
• Inventors: Rademan, Jerry E., Black, Robert H.
• Application Number:
  US13/189,208
• Publication Number:
  US 20130022686A1
• Time in Patent Office: Days
• US Class Current: 424/600
• CPC Class Codes: A61P 17/00 Drugs for dermatological disorders
• CPC Class Codes: A61P 17/06 Antipsoriatics
• CPC Class Codes: C02F 1/001 Processes for the treatment of water whereby the filtration technique is of importance C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/505 by oligodynamic treatment
• CPC Class Codes: C02F 1/64 of iron or manganese
• CPC Class Codes: C02F 1/725 by catalytic oxidation
• CPC Class Codes: C02F 2101/20 Heavy metals or heavy metal compounds

Abstract

By sequentially aligning various filtration media and delivery systems, enhanced synergistic reduction of water contaminants is obtained compared to the prior art or separate use of the individual media/filters. Specific filtration media are formulated with proper proportioning and sequencing to enhance the ability to reduce metals that cause staining, odors and bad taste such as iron, copper and manganese. Also disclosed is the reduction of potentially hazardous metal radionuclides metals such as uranium, iodine, cesium, plutonium and radium. Also disclosed is improved removal of heavy metals such as arsenic, lead, chromium, and mercury as well as organic compounds such as halogenated carcinogenic compounds. The present devices and methods remove specific bacteria and their toxins from water to reduce the risk of dermatitis. Thus, the present invention enhances our ability to achieving cleaner and safer water for drinking, swimming, washing, bathing and cooking.

Claims

7. A method for removing or reducing the level of a contaminant from a liquid comprising:

(a) filtering the liquid through an alkali metal carbonate to obtain a first filtrate;

(b) treating the first filtrate with a filtration medium coated with manganese dioxide.

1. A liquid filtration system for removing or reducing the level of a contaminant from a liquid comprising the following filtration devices or elements serially disposed:

(a) an optional mechanical pre-filter;

(b) a bed of crystalline alkaline earth carbonate;

(c) an optional oxidation chamber that releases calcium peroxide, magnesium peroxide or sodium percarbonate into the liquid;

(d) a bed of MnO₂-coated medium;

(e) a bed of activated carbon optionally comprising silver ions at levels ranging from 0.001% to 3.0% (w/w); and

(f) an optional size exclusion filter.

2. The system of claim 1 wherein the liquid is water.

3. The system of claim 1 wherein the contaminant being removed is an inorganic metal or H₂S.

4. The system of claim 3 wherein the metal is Fe, Cu, Mn, Pb, As, Cr, Co, Ni, Al, Ag or Zn.

5. The system of claim 1 wherein the contaminant being removed is a radionuclide.

6. The system of claim 1 wherein the contaminant being removed is bacteria or a toxin produced by the bacteria.

8. The method of claim 7 further comprising a step of:

(c) filtering the liquid through a reducing or oxidizing ion exchange resin.

9. The method of claim 7 further comprising, before step (b), a step of

(c) treating the liquid with a surface-treated titanium dioxide.

10. The method of claim 9 further comprising after step (b) a step of:

(d) treating the liquid with granular and/or powdered activated carbon.

11. The method of claim 10 wherein the activated carbon is granular and to which is added a composition comprising 0.001 to 3.0% (w/w) silver ions that prevent or reduce bacterial growth in the liquid.

12. The method of claim 7, further comprising after step (b) a step of:

(e) filtering the liquid through a filter having a pore size between about 0.1 μ

m and about 40 μ

m.

13. The method of claim 10, further comprising after step (b) or (d) a step of:

(e) filtering the liquid through a filter having a pore size between about 0.1 μ

m and about 40 μ

m.

14. The method of claim 7, comprising, prior to step (b), a step of treating the liquid with a powdered oxidizing agent.

15. The method of claim 14 wherein said oxidizing agent is calcium peroxide, magnesium peroxide or sodium percarbonate.

16. The method of claim 7 wherein the liquid is water.

17. The method of claim 16 wherein the water is in a municipal water supply or a well.

18. The method of claim 7 wherein the alkali metal carbonate is CaCO₃, MgCO₃, Li₂CO₃, or a mixture thereof.

21. The method of claim 7 wherein the contaminant is a radionuclide.

22. The method of claim 21 wherein the radionuclide is U, Cs, Pu, Ra, Co or I.

23. The method of claim 7 wherein the contaminant is bacteria or a toxin produced by the bacteria.

24. The method of claim 23 wherein the bacteria are Clostridium perfringens

25. A method of preventing or ameliorating a skin condition, disorder or disease in a subject having or being susceptible to said condition, disorder or disease, comprising providing to said subject a water supply used by said subject for bathing or washing water that has been treated by the method of claim 7.

26. The method of claim 25, wherein the condition, disease or disorder is dermatitis, eczema or psoriasis.

17-1. The method of any of claim 7, wherein the MnO₂ is MTM®

, a form of Manganese Greensand, or another MnO₂-coated medium base.

18-2. The method of claim 17 wherein the medium base is sand, zeolite, activated carbon, an alkali metal carbonate or an oxide.

19. The method of claim wherein the contaminant is an inorganic metal.

20. The method of claim 19 wherein the inorganic metal is Fe, Cu, Mn, Pb, As, Cr, Co, Ni, Al, Ag, Au, or Zn.

27. A method of preventing or ameliorating a skin condition, disorder or disease in a subject having or being susceptible to said condition, disorder or disease, comprising

(i) treating a water supply used by the subject with the following filtration and treatment steps:

(a) filtering the water through mechanical pre filter that removes silt;

(b) filtering the water through crystalline CaCO₃, MgCO₃, Li₂CO₃ or a mixture thereof;

(c) treating the water by controlled release of an oxidizing agent selected from the group consisting of calcium peroxide, magnesium peroxide and sodium percarbonate dispensed from a ceramic fiber bag with limited porosity;

(d) filtering to water through MgO₂-coated zeolite;

(e) treating the water with activated carbon to which is added a composition comprising 0.001 to 3.0% (w/w) silver ions; and

filtering the water liquid through a filter having a pore size of about 1 μ

m.

(ii) providing said treated, filtered water to said subject for bathing or washing.