Removal of colored substances from aqueous liquids

摘要

The use of a decolorizing composition for removing colored substances from aqueous fluids (e.g., colored pigments, blood-containing fluids, etc.) is provided. The decolorizing composition contains one or more inorganic salts. In one embodiment, for example, the composition contains a mixture of sodium sulfate (Na2SO4) and monopotassium phosphate (KH2PO4). The decolorizing composition may be placed in fluid communication with an absorbent core, a liquid-permeable layer, or combinations thereof, in an absorbent article to help decolorize blood-containing fluids (e.g., menses) exuded from the body.

主权项

1. An absorbent article, comprising:
a liquid permeable layer; a generally liquid impermeable layer; an absorbent core disposed between the liquid permeable layer and the generally liquid impermeable layer; and a decolorizing composition for altering the color of blood-containing aqueous fluids, wherein the decolorizing composition is in fluid communication with the absorbent core, the liquid permeable layer, or combinations thereof, wherein the decolorizing composition comprises a first inorganic salt, and a second inorganic salt, wherein the first inorganic salt and the second inorganic salt each contain a polyvalent anion and a monovalent cation, wherein the decolorizing composition consists essentially of the inorganic salts, wherein the decolorizing composition contained within a hollow enclosure, wherein the hollow enclosure is formed from a fibrous web, further wherein the hollow enclosure completely surrounds the absorbent core.