Filtration medium comprising a metal sulfide
View Patent ↗Described herein is a liquid filtration device is disclosed a vessel for treating an aqueous liquid, wherein the vessel contains a filtration medium and wherein the filtration medium comprises a metal sulfide, wherein the sulfur in the form of a metal sulfide is at least 0.5% by weight of the filtration media.
1. A method for removing chloramine from aqueous solutions, the method comprising:
providing an aqueous solution comprising chloramine; and
contacting the aqueous solution with a supported metal sulfide composition, wherein the supported metal sulfide composition comprises spherically-shaped carbon-containing particles and the surface of the spherically-shaped carbon-containing particles comprises at least 0.5% by weight of a metal sulfide.
2. The method of claim 1 , wherein the metal of the metal sulfide is selected from copper, iron, manganese, silver, zirconium, niobium, molybdenum, tungsten, and combinations thereof.
3. The method of claim 1 , wherein the supported metal sulfide composition is disposed in a matrix.
4. The method of claim 3 , wherein the matrix is a web, or a polymer-containing composite block.
5. The method of claim 1 , wherein the spherically-shaped carbon-containing particles are activated carbon.
6. The method of claim 1 , wherein the supported metal sulfide composition comprises carbon, molybdenum, and sulfur.
7. The method of claim 1 , wherein the supported metal sulfide composition is selected from a reaction product of:
(a) co-precipitation of the metal sulfide onto spherically-shaped carbon-containing particles;
(b) reacting spherically-shaped carbon-containing particles comprising a metal oxide with a sulfur source;
(c) reacting spherically-shaped carbon-containing particles comprising a metal salt with a sulfur source;
(d) heating spherically-shaped carbon-containing particle with a metal carbonyl in the presence of a sulfur source;
(e) reacting spherically-shaped carbon-containing particles comprising a metal with a sulfur source; and
(g) thermal decomposition of spherically-shaped carbon-containing particles comprising a thiometallate or oxythiometallate.
8. The method of claim 7 , wherein the sulfur source is selected from elemental sulfur, hydrogen sulfide, sulfided carbon, and combinations thereof.
9. The method of claim 7 , wherein the metal salt is selected from a carboxylate, a nitrate, a halide, a sulfate, a hydroxide, a carbonate, and combinations thereof.