The present invention relates to a method for producing a textile material having an antimicrobial compound in a manner in which the antimicrobial compound chemically binds or adheres to the textile material, and to a treated textile material which itself functions as a disinfectant or disinfectant. The treated textile material exhibits cleaning durability and non-leaching properties. The method includes a desorption process cycle comprising treating the textile material using an exhaustion process, wherein the liquor comprises one or more antimicrobial agents and the treated textile material is heat treated. The invention also relates to a water purification device capable of operating on the basis of gravity without electricity.