Color removal with zipgem filtration media for water and wastewater treatment

Patent metadata

Field	Value
Publication number	US-12577129-B2
Application number	US-202318303973-A
Country	US
Kind code	B2
Filing date	Apr 20, 2023
Priority date	Apr 21, 2022
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

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 comprising:
at least one silicon atom; at least one aluminum atom; at least one zero-valence-iron (hereinafter “ZVI”) atom; wherein the filtration media comprises a composition of at least 85% sand, at most 5% clay, at most 6% ZVI atom, and at most 4% perlite by percent volume; wherein the ratio of the at least one ZVI atom to the at least one grain of sand is at most 0.071 by percent volume; wherein the filtration media comprises a surface area of at most 3.00 m 2 ·g −1 ; wherein the filtration media comprises a porosity of at least 29.0% of percent surface area; wherein the filtration media construct comprises a density of at least 2.50 g·cm −3 ; and wherein the filtration media comprises a saturated hydraulic conductivity of at least 10 −5 m·s −1 .

2 . The filtration media of claim 1 , wherein the filtration media further comprises at least one potassium atom, at least one calcium atom, or both.

3 . The filtration media of claim 1 , wherein the filtration media comprises a heterogenous morphological structure.

4 . The filtration media of claim 1 , wherein the filtration media is configured to maintain an effluent concentration below 40 color units of the Platinum-Cobalt Scale (hereinafter “Pt—CO”).

5 . The filtration media of claim 1 , wherein the filtration media is configured to inhibit ponding, clogging, or both within at least one pour of the filtration media for at least 40,000 minutes.

6 . The filtration media of claim 1 , wherein the filtration media is configured to maintain an adsorption capacity of at least 25.0 mg Pt—Co·g −1 .

7 . A method of optimizing a color removal reaction 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 filtration media comprises a composition of at least 85% sand, at most 5% clay, at most 6% ZVI atom, and at most 4% perlite by percent volume;
wherein the ratio of the at least one ZVI atom to the at least one grain of sand is at most 0.071 by percent volume;
wherein the filtration media comprises a surface area of at most 3.00 m 2 ·g −1 ;
wherein the filtration media comprises a porosity of at least 29.0% of percent surface area;
wherein the filtration media construct comprises a density of at least 2.50 g·cm −3 ; and
wherein the filtration media comprises a saturated hydraulic conductivity of at least 10 −5 m·s −1 ; and
wherein the incorporation of the filtration media to the water sample thereof optimizes the color removal reaction within the water sample.

8 . The method of claim 7 , wherein the filtration media is configured to operate continuously in the water sample for at least 14,000 minutes.

9 . The method of claim 7 , wherein the filtration media 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.

10 . The method of claim 7 , wherein the filtration media configured to maintain an adsorption capacity of at least 25.0 mg of Pt—Co·g −1 .

11 . A method of synthesizing a filtration media, the method comprising:
providing at least one zero-valent iron (“ZVI”) material; mixing the ZVI material with sand, clay, and perlite in proportions of at least 85% sand, at most 5% clay, at most 6% ZVI, and at most 4% perlite by percent volume; and subjecting the mixture to heat treatment to produce a filtration media having a porosity of at least 29%, a BET specific surface area of at most 3.0 m 2 ·g −1 , a density of at least 2.50 g·cm −3 , and a saturated hydraulic conductivity of at least 10 −5 m·s −1 .

12 . The method of claim 11 , wherein the heat treatment is conducted at a temperature of at least 850° C.

13 . The method of claim 11 , wherein the heat treatment is configured to promote formation of a heterogeneous morphological structure within the filtration media.

14 . The method of claim 11 , wherein the filtration media synthesized is configured to inhibit ponding, clogging, or both within at least one pour of the filtration media for at least 40,000 minutes.

Assignees

• Univ Central Florida Res Found Inc

Inventors

• Chang Ni-Bin

Classifications

• B01J20/28059

  being less than 100 m2/g · CPC title

• C02F1/281

  using inorganic sorbents · CPC title

• B01J20/28011

  Other properties, e.g. density, crush strength · CPC title

• C02F2101/308

  Dyes; Colorants; Fluorescent agents · CPC title

• B01J20/106 Primary

  Perlite · CPC title