MATERIALS AND METHODS FOR REMOVING ARSENIC FROM WATER
First Claim
Patent Images
1. A method of purifying water, comprising:
- contacting the water with a quaternary oxide while exposing the quaternary oxide to visible light, the quaternary oxide containing;
a dopant metal,a dopant nonmetal,titanium, andoxygen;
where the atomic ratio of titanium, oxygen and dopant nonmetal is 1;
0.5-1.99;
0.01-1.5.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of purifying water comprises contacting the water with a quaternary oxide while exposing the quaternary oxide to visible light, the quaternary oxide containing a dopant metal, a dopant nonmetal, titanium, and oxygen. The atomic ratio of titanium, oxygen and dopant nonmetal is 1:0.5-1.99:0.01-1.5.
57 Citations
37 Claims
-
1. A method of purifying water, comprising:
-
contacting the water with a quaternary oxide while exposing the quaternary oxide to visible light, the quaternary oxide containing; a dopant metal, a dopant nonmetal, titanium, and oxygen; where the atomic ratio of titanium, oxygen and dopant nonmetal is 1;
0.5-1.99;
0.01-1.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of oxidizing As(III) to As(V), comprising:
-
contacting a solution containing As(III) with a quaternary oxide while exposing the quaternary oxide to visible light, the quaternary oxide containing; a dopant metal, a dopant nonmetal, titanium, and oxygen; where the atomic ratio of titanium, oxygen and dopant nonmetal is 1;
0.5-1.99;
0.01-1.5. - View Dependent Claims (15, 16, 17, 18)
-
-
19-25. -25. (canceled)
-
26. A method of removing arsenic from water, comprising:
-
contacting the water with a quaternary oxide while exposing the quaternary oxide to visible light, the quaternary oxide containing; a dopant metal, a dopant nonmetal, titanium, and oxygen; where the atomic ratio of titanium, oxygen and dopant nonmetal is 1;
0.5-1.99;
0.01-1.5, andthe dopant nonmetal is nitrogen.
-
-
27-35. -35. (canceled)
-
36. A catalyst for oxidizing As(III) to As(V), containing:
-
a dopant metal, a dopant nonmetal, titanium, and oxygen; where the atomic ratio of titanium, oxygen and dopant nonmetal is 1;
0.5-1.99;
0.01-1.5, andthe dopant nonmetal is nitrogen.
-
-
37-45. -45. (canceled)
Specification