Color removal with zipgem filtration media for water and wastewater treatment

Patent metadata

Field	Value
Publication number	US-2024375975-A1
Application number	US-202418770246-A
Country	US
Kind code	A1
Filing date	Jul 11, 2024
Priority date	Apr 21, 2022
Publication date	Nov 14, 2024
Grant date	—

Abstract

Described herein relates to an optimum, low maintenance and low-cost filtration media which may be implemented near a source water location as a pretreatment to remove tannic acid and/or humic acid (color) from dissolved natural organic matter (NOM) (i.e., tannic acid, humic acid) to impede the prompt production of disinfection by-products collectively termed trihalomethanes in drinking water treatment processes. In an embodiment, the filtration media may comprise a composition having a ratio of at least 83% sand, at most 5% clay, at most 6% ZVI and at most 6% perlite by percent volume.

First claim

What is claimed is:

1 . A filtration media for the removal of at least one phosphorus molecule, microcystin molecule, or both from a water sample comprising:
at least one silicon atom; at least one aluminum atom; at least one zero-valence-iron (hereinafter “ZVI”) atom; wherein the at least one ZVI atom is chemically bonded to the at least one silicon atom of at least one grain of perlite, thereby forming at least one ZVI-perlite structure; wherein the at least one ZVI-perlite structure is chemically bonded to at least one alterative silicon atom of at least one grain of sand, thereby forming at least one quartz structure, whereby the at least one ZVI atom is disposed about at least a portion of a surface of the at least one quartz structure; and wherein the at least one ZVI-coated quartz structure is metallically bonded to at least one aluminum atom, thereby forming an aluminum-doped ZVI-quartz construct.

2 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct further comprises at least one potassium atom, at least one calcium atom, or both.

3 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct comprises a heterogenous morphological structure.

4 . The filtration media of claim 1 , wherein the ratio of the at least one ZVI atom to the at least one grain of sand within the aluminum-doped ZVI-quartz construct is at most 0.071 by percent volume.

5 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct comprises a composition ratio of at least 85% sand, at most 5% clay, at most 6% ZVI, and at most 4% perlite by percent volume.

6 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct comprises a surface area of at most 3.00 m 2 ·g −1 .

7 . The filtration media of claim 6 , wherein the aluminum-doped ZVI-quartz construct is configured to be hydraulicly conductive, highly porous, or both.

8 . The filtration media of claim 7 , wherein the aluminum-doped ZVI-quartz construct comprises a porosity of at least 29.0% of percent surface area.

9 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct comprises a density of at least 2.50 g·cm −3 .

10 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct is electrochemically stable.

11 . The filtration media of claim 1 , wherein the aluminum-doped ZVI-quartz construct is hydrophobic.

12 . A method of optimizing a phosphorus removal reaction, a microcystin removal reaction, or both within a water sample, the method comprising:
incorporating a filtration media into the water sample, the filtration media comprising:
at least one silicon atom;
at least one aluminum atom;
at least one zero-valence-iron (hereinafter “ZVI”) atom;
wherein the at least one ZVI atom is chemically bonded to the at least one silicon atom of at least one grain of perlite, thereby forming at least one ZVI-perlite structure;
wherein the at least one ZVI-perlite structure is chemically bonded to at least one alterative silicon atom of least one grain of sand, thereby forming at least one quartz structure, whereby the at least one ZVI atom is disposed about at least a portion of a surface of the at least one quartz structure; and
wherein the at least one ZVI-coated quartz structure is metallically bonded to at least one aluminum atom, thereby forming an aluminum-doped ZVI-quartz construct; and
wherein the incorporation of the filtration media to the water sample thereof optimizes the phosphorus removal reaction within the water sample.

13 . The method of claim 12 , wherein the aluminum-doped ZVI-quartz construct is configured to maintain an effluent concentration below at least 40 color units of Pt—Co.

14 . The method of claim 13 , wherein the aluminum-doped ZVI-quartz construct is configured to operate continuously in the water sample for at least 14,000 minutes.

15 . The method of claim 12 , wherein the aluminum-doped ZVI-quartz construct is configured to inhibit ponding, clogging, or both within at least one pour of the aluminum-doped ZVI-quartz construct for at least 40,000 minutes.

16 . The method of claim 12 , wherein the aluminum-doped ZVI-quartz construct is configured to maintain an adsorption capacity of at least 25.0 mg of Pt—Co·g −1 .

17 . A method of synthesizing a filtration media for the removal of at least one phosphorus molecule, microcystin molecule, or both, the method comprising:
pretreating at least one iron atom, wherein the at least one iron atom comprises zero-valence (hereinafter “ZVI”); chemically bonding at least one silicon atom of at least one grain of perlite to the at least one ZVI atom to form a ZVI-perlite structure; chemically bonding at least one alternative silicon atom of at least one grain of sand to the ZVI-perlite structure to a quartz structure, whereby the at least one ZVI atom is disposed about at least a portion of a surface of the quartz structure; and metallically bonding at least one aluminum atom to the ZVI-coated quartz structure to form the filtration media which is an aluminum-doped ZVI-quartz construct.

18 . The method of claim 17 , wherein heat treatment is used to chemically bond the at least one grain of perlite to the at least one grain of sand.

19 . The method of claim 17 , wherein heat treatment is used to chemically bond the at least one ZVI atom to the at least one grain of perlite.

20 . The method of claim 17 , wherein heat treatment is used to chemically bond the at least one aluminum atom to the at least one ZVI-coated quartz structure.

Assignees

• Univ Central Florida Res Found Inc

Inventors

• Chang Ni-Bin

Classifications

• B01J20/3078

  Thermal treatment, e.g. calcining or pyrolizing · CPC title

• C02F2101/20

  Heavy metals or heavy metal compounds · CPC title

• B01J20/10

  comprising silica or silicate · CPC title

• B01J20/3236

  containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title