Abstract: The invention provides compositions for purification of fluids such as water and air. In particular the invention provides a mixture of a chlorhexidine substance, a calcium phosphate compound, a carbon material and sand. The mixed compositions may be provided in the form of loose particles that optionally contain a binder that swells in the presence of a fluid to be filtered. The compositions avoid the need for pre-formation of filter cartridges and may be used in a variety of water purification devices without further adaptation. The compositions also enable rapid, economical generation of purified fluids that are essentially free of chlorhexidine. The invention can be used for either high volume applications or disposable single-use applications.

Abstract: The invention provides systems and methods for purification of fluids such as water and air. The fluids are passed through a filter comprising chlorhexidine citrate (CXC), wherein either in the same filter or downstream from it a sorbing mixture of porous calcium phosphate, calcium carbonate and activated carbon is also provided. The invention enables rapid, economical fluid purification without byproducts. The materials can be regenerated for reuse, and the invention can be used for either high volume applications or disposable single-use applications.

Abstract: The invention provides systems and methods for purification of fluids such as water and air. The fluids are passed through a filter comprising chlorhexidine citrate (CXC), wherein either in the same filter or downstream from it a sorbing mixture of porous calcium phosphate, calcium carbonate and activated carbon is also provided. The invention enables rapid, economical fluid purification without byproducts. The materials can be regenerated for reuse, and the invention can be used for either high volume applications or disposable single-use applications.

Abstract: Composite materials with broad spectrum antimicrobial properties and methods and devices for fluid treatment utilizing said materials are provided. The antimicrobial composite materials may include combinations of activated carbon and a biguanide hydrate. A particular composition includes a mixture of carbon particles and particles of chlorhexidine hydrate, which is useful in fixed particle bed water treatment devices and methods.

Abstract: An antimicrobial composition for use in water, air, and other fluid treatment applications is provided. The composition includes a biguanide dihydrate compound, such as a chlorhexidine dihydrate, which exhibits broad spectrum antimicrobial activity.

Abstract: Devices and methods for inactivating microbiological contaminants in a fluid are provided for use in water, air, and other fluid treatment applications. The device includes (i) a housing having at least one fluid inlet and at least one fluid outlet; and (ii) an antimicrobial material secured in the housing between said at least one fluid inlet and said at least one fluid outlet. In one embodiment, the antimicrobial material is a biguanide dihydrate compound, such as a chlorhexidine dihydrate, which exhibits broad spectrum antimicrobial activity.

Abstract: Purification materials with broad spectrum antimicrobial properties and methods and devices for fluid treatment utilizing said materials are provided. The purification materials include biguanide hydrates and bases. A particular composition includes chlorhexidine dihydrate with the chemical formula (C22H30N10Cl2.1.3 H2O), which is useful in water purification applications.

Abstract: Purification materials with broad spectrum antimicrobial properties and methods and devices for fluid treatment utilizing said materials are provided. The purification materials include biguanide hydrates and bases. A particular composition includes chlorhexidine dihydrate with the chemical formula (C22H30N10Cl2.1.3 H2O), which is useful in water purification applications.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid water is passed through a purification material composed of apatite and absorption media in a fixed binder matrix.

Abstract: A method for generating composite materials and devices from these materials for the filtration, purification, and processing of fluids, water, or other solutions containing microbiological or chemical contaminants, such as fluids containing cysts, bacteria, and/or viruses and inorganic and/or organic contaminants, where the fluid is passed through or over a composite purification material composed of non-expandable and expandable matter that swell through the absorption of fluid.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid is passed through a purification material composed of aluminosilicates and more preferably bauxite and absorption media in a fixed binder matrix.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid water is passed through a purification material composed of apatite and absorption media in a fixed binder matrix.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid water is passed through a purification material composed of apatite and absorption media in a fixed binder matrix.

Abstract: A method and device for the filtration and/or purification of fluids water or other solutions containing microbiological contaminants, such as fluids containing including bacteria and/or viruses, where the fluid water is passed through a purification material composed of apatite and absorption media in a fixed binder matrix.

Abstract: A multiple stage filter having an extended useful life comprising a first stage having granulated activated carbon enclosed by multiple filter wafers, the filter wafer comprising a number of filter media having pore size ranging from 0.45 microns to 5 microns, and a second stage comprising a filter membrane having pore size of 0.2 microns or less and a surface area of several square feet, such that greater than 99 percent of particulates greater than 0.5 microns are removed in the first stage and greater than 99.9 percent of the bacteria and cysts are removed in the second stage.