Portable water purification
Portable drinking water systems or chemical additives are available for hiking, camping, and travel in remote areas. Portable pump filters are commercially available with ceramic filters that will filter 5000 to 50,000 liters per cartridge. Some also utilize activated charcoal filtering. Chemical additives include chlorine dioxide or iodine solutions.
Iodine, in solution, crystallized, or in tablets, is added to water. The iodine kills off many, but not all, of the most common pathogens that may be present in natural fresh water sources such as lakes, rivers, and streams. Carrying iodine for water purification is a lightweight but imperfect solution for those in need of field purification of drinking water.
Solar Disinfection (Sodis): Microbes are destroyed through temperature and UVA radiation, provided by the Sun. Water is placed in a transparent plastic bottle, which is oxygenated by shaking, followed by topping-up. It is placed on tile or metal for six hours in full sun, which raises the temperature and gives an extended dose of solar radiation, killing any microbes that may be present. The combination of the two provides a simple method of disinfection for tropical developing countries.





