Degermination methods Chlorine dioxide

What is chlorine dioxide?
Chlorine dioxide is an orange-yellow-colored, poisonous and penetrative smelling gas. The chlorine dioxide molecule consists of an atom chlorine and two atoms oxygen (ClO2).
Chlorine dioxide is an oxidating biocide, like ozone and chlorine, and is not a metabolic toxin. This means that chlorine dioxide destroys microorganisms by interrupting the transport of nutrients in the membrane of the cell and not through interruption of a metabolic process.
The stabilized chlorine dioxide is ClO2 buffered in an aqueous solution. Adding acid with the required concentration activates the disinfectant.
Specific characteristics of the disinfectant make sure that ClO2 works where other disinfectants fail.
Chlorine dioxide plays a special role in disinfection of swimming pools, cooling towers, airwashers or bleaching textiles and paper as well as microbe-precaution and –monitoring, that can cause legionnaires’ disease.
Unpleasant odor- and flavor-additives in the water, that descend from phenols, algae or its decomposition products for example, are oxidated by chlorine dioxide and transformed into odorless- and tasteless substances.
Contrary to chlorine, the degermination-speed of chlorine dioxide is not reduced with increasing pH-value. Chlorine dioxide is consistent in water. After the attrition is completed excess is held up for a length of time so that an excess can be held up to the end-line even in spacious tubing and therefore a renewed water-infection can be encountered effectively in the tubing.
General advantages:
- high power output (up to 250% higher oxidation-energy than chlorine)
- effective removal and prophylaxis of biofilms
- constant bactericidal efficiency in a large pH-area (4-10)
- high efficiency against all water-common microorganisms
- no formation of chemical resistance of microorganisms
Chlorine dioxide is an unstable radical compound that is highly explosive in pure condition as well as in air-concentration down until 10 Vol. %. It collapses under light and by heightened temperature of 102.6 kJ/mol to chlorine and oxygen.
For these reasons a conventional production of chlorine dioxide is bound to an expensive industrial- and building-system and a high risk-potential which makes it harder to spread the substance as an universal applicable disinfectant, especially in small or medium applications.
See also chlorine..