Color removal with zipgem filtration media for water and wastewater treatment
AssigneeUniversity of Central Florida Research Foundation, Inc.
InventorNi-Bin Chang
Life of this patent
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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.
Claims14
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 m2·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.
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 m2·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.
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 m2·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.
Dependencies are inferred from the claim text.