Abstract: A device for producing chlorine dioxide vapor in a time release manner when exposed to ambient moisture is provided. The device comprises two outer membranes and an inner membrane. The outer and inner membranes are sealed together along the edges of the device. The outer and inner membranes together form a pouch comprising two separate compartments separated by the inner membrane. Each compartment is provided with a dry reactant (e.g. an acid component and a metal chlorite component) for producing chlorine dioxide vapor. The outer membranes are permeable to moisture and chlorine dioxide vapor, and impervious to liquid water and the dry reactants. The acid component in one of the compartments is hydrated by the moisture penetrated through the outer membranes, and the hydrated acid component is absorbed by the inner membrane and transported across the inner membrane to come into contact with the metal chlorite component in the other compartment to produce chlorine dioxide vapor.

Abstract: A system for disinfecting and purifying aqueous solutions and water for drinking purposes comprising an outer pouch, a disinfectant generating device, and an inorganic coagulant. The disinfectant generating device is provided with a membrane shell defining at least two compartments which house a first reactant, a second reactant, and an inorganic coagulant. The disinfectant generating device is capable of producing a disinfectant when exposed to water or moisture and the disinfectant exits the compartment through the membrane shell. The inorganic coagulant aid the formation of flocs of the suspended dispersed particles in the aqueous solution.