A non-toxic environmentally friendly aqueous disinfectant is disclosed for specific use as prevention against contamination by potentially pathogenic bacteria, fungi and virus. The aqueous disinfectant is formulated by electrolytically generating silver ions in water in combination with a citric acid. The aqueous disinfectant has many potential uses including bacteria, fungus and viral treatment, water treatment, medical treatment as well as for preserving consumable and non-consumable products.