초록 ▼

The present invention is directed to a biocidal water treatment composition, water treatment apparatus, and method of treating water to reduce levels of pathogens. The composition contains sources of copper, zinc, and silver metal ions within a crosslinked polymer matrix. Examples of these ion sourc

The present invention is directed to a biocidal water treatment composition, water treatment apparatus, and method of treating water to reduce levels of pathogens. The composition contains sources of copper, zinc, and silver metal ions within a crosslinked polymer matrix. Examples of these ion sources include copper sulfate, zinc sulfate, and silver nitrate. An example of the crosslinked polymer matrix is crosslinked chitosan, which also serves to clarify the water and release the metal ions over time. The product is easy to manufacture, and allows the use of decreased halogen sanitizer, as well as decreased copper ion, thereby decreasing the likelihood of staining. The product simultaneously provides good bactericidal and algaecidal properties, despite low levels of copper ion and low chlorine levels.

대표청구항 ▼

[ What is claimed is:] [1.]1. A water treatment system comprising:(a) a composition for treating water, formed by preparing a mixture comprising(1) a source of copper ion;(2) a source of silver ion;(3) a source of zinc ion;(4) one or more crosslinkable polymers; and(5) a crosslinking agent allowing

[ What is claimed is:] [1.]1. A water treatment system comprising:(a) a composition for treating water, formed by preparing a mixture comprising(1) a source of copper ion;(2) a source of silver ion;(3) a source of zinc ion;(4) one or more crosslinkable polymers; and(5) a crosslinking agent allowing the mixture to dry to a solid composition, wherein the source of copper ion is present in an amount that provides a copper ion concentration in the water to be treated below the level at which copper staining of surfaces in contact with the water will occur; and(b) a container substantially immobilizing the composition (a), comprising at least one water inlet opening and at least one water outlet opening, and adapted to permit water to flow into and out of the container and to contact the composition.