Clarification and sorptive-filtration system for the capture of constituents and particulate matter in liquids and gases
A sorptive-filtration system for removing at least one of negatively or positively charged ions, complexes or particulates from an aqueous stream. The system includes a) flow formed substantially from at least one of rainfall-runoff or snowmelt-runoff; b) a filter containment communicating with the runoff stream such that at least part of the stream passes through the filter containment; and c) a granular filter media disposed within the filter containment, the filter media having an amphoteric material applied thereto, wherein the amphoteric material comprises a metal selected from at least one of Fe, Al, Mn, or Si.
1. A filtration system for removing waterborne constituents, comprising:
a. an inflow conduit positioned to receive water runoff from a paved surface;
b. a filter containment communicating with said inflow conduit such that at least part of said water runoff passes through said filter containment; and
c. a granular filter media disposed within said filter containment, said filter media comprising an amphoteric material applied thereto, wherein said amphoteric material comprises at least one of aluminum oxide or manganese oxide, and wherein said filter media has a specific surface area of at least 20 m 2 /gram.
2. The filtration system of claim 1 , wherein said filter containment consists essentially of a porous mesh material substantially enclosing said media.
3. The filtration system of claim 1 , wherein said filter media is a granular media bed having a porosity of between about 0.2 and about 0.7.
4. The filtration system of claim 1 , wherein said amphoteric material comprises both an oxide of Si and at least one oxide of a metal selected from at least one of Al, Mn, or Fe.
5. The filtration system of claim 4 , wherein said filter media comprises a first media having a Si oxide applied thereto and a second media having at least one oxide of at least one of Al, Mn, or Fe.
6. The filtration system of claim 1 , wherein said filter containment comprises a porous textile or geotextile material.
7. The filtration system of claim 1 , wherein said filter containment comprises a rigid material.
8. The filtration system of claim 1 , wherein said filter containment comprises a porous mesh material and said porous mesh material comprises a wire mesh or a fabric mesh.
9. The filtration system of claim 1 , wherein said filter system includes a rigid media housing and said filter containment is a flexible material generally shaped to fit within said media housing.
10. The filtration system of claim 3 , wherein said filter media is a granular media having a hydraulic conductivity of between about 1.0 and about 0.000 1 cm/sec.
11. The filtration system of claim 1 , wherein said media has a specific gravity of between about 0.2 and about 1.0.
12. The filtration system of claim 1 , wherein said media comprises a granular substrate having an average diameter ranging from 0.1 mm to 100 mm.
13. A filtration system for removing waterborne constituents from water runoff, comprising:
a. a flow comprising water runoff from a paved surface;
b. a filter containment communicating with said flow such that at least part of said flow passes through said filter containment; and
c. a cementitious granular filter media disposed within said filter containment, said filter media comprising an amphoteric material applied thereto, wherein said amphoteric material comprises at least one oxide of a metal selected from at least one of Fe, Al, Mn, or Si.
14. The filtration system of claim 13 , wherein individual media elements of said filter media have a hydraulic conductivity of between about 0.0001 and 1.0 cm/s.
15. The filtration system of claim 1 , wherein a size of granules in said filter media is between 0.2 mm and 10 mm.
16. The filtration system of claim 13 , wherein said filter media comprises individual granules having a hydraulic conductivity of between about 0.0001 and about 1.0 cm/sec.
17. The filtration system of claim 3 , wherein said media bed comprises individual granules having a porosity of between about 0.05 and about 0.6.
18. A filtration system for removing waterborne constituents, comprising:
a. a flow comprising water runoff from a substantially impermeable surface;
b. a filter containment communicating with said flow such that at least part of said flow passes through said filter containment; and
c. a granular filter media disposed within said filter containment, said filter media comprising an amphoteric material applied thereto, wherein said amphoteric material comprises at least one of aluminum oxide or manganese oxide.
19. The filtration system of claim 18 , wherein said filter media has a specific surface area of at least 20 m 2 /gram.
20. A filtration system for removing waterborne constituents, comprising:
a. a rigid media housing;
b. a filter containment comprising a porous mesh material positioned in said media housing; and
c. a granular filter media disposed within said filter containment, said filter media comprising an amphoteric material applied thereto, wherein said amphoteric material comprises at least one of aluminum oxide or manganese oxide.
21. The filtration system of claim 20 , wherein said porous mesh material is a wire mesh.
22. The filtration system of claim 20 , wherein a flow comprising water runoff from a roadway pavement communicates with said media housing.
23. The filtration system of claim 20 , wherein said media comprises at least one of perlite, fired silt, fired clay, or pumice.
24. The filtration system of claim 23 , wherein said media has a hydraulic conductivity of between about 0.0001 and about 1.0 cm/sec.
25. The filtration system of claim 1 , wherein said filter media comprises at least a first media having either manganese oxide or alumina oxide bonded thereto and a second media having a different amphoteric compound bonded thereto, said different amphoteric compound being either aluminum oxide, manganese oxide, silicon oxide, or iron oxide.
26. The filtration system of claim 25 , wherein said first media and said second media are position in separate layers in said filter containment.
27. The filtration system of claim 1 , wherein flow comprises diffuse flows.
28. The filtration system of claim 19 , wherein said filter containment is an in-situ system.
29. The filtration system of claim 19 , wherein said filter containment is an ex-situ system.
30. The filtration system of claim 1 , wherein said filter containment is position within a volumetric separation system or said filter containment receives said flow from a volumetric separation system.
31. The filtration system of claim 20 , wherein said media housing is formed to direct flow in an axial direction or a radial direction through said media.
32. A filtration system for removing waterborne constituents, comprising:
a. an inflow conduit positioned to receive water from a unit operation and process system;
b. a filter containment communicating with said inflow conduit such that at least part of said water runoff passes through said filter containment; and
c. a granular filter media disposed within said filter containment, said filter media comprising an amphoteric material applied thereto, wherein said amphoteric material comprises at least one of an aluminum oxide, an iron oxide, a manganese oxide or silica, and wherein said filter media has a specific surface area of at least 20 m 2 /gram.